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588 results about "RC circuit" patented technology
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A resistor–capacitor circuit (RC circuit), or RC filter or RC network, is an electric circuit composed of resistors and capacitors driven by a voltage or current source. A first order RC circuit is composed of one resistor and one capacitor and is the simplest type of RC circuit.
Current sensing in multiple coupled inductors by time constant matching to leakage inductance
InactiveUS7233132B1Small and negligible leakage inductanceImprove accuracyDc-dc conversionElectric variable regulationRC time constantEngineering
Voltage regulators often have coupled output inductors because coupled output inductors provide improvements in cost and efficiency. Coupled inductors are often used in multi-phase voltage regulators. Feedback control of voltage regulators often requires accurate and responsive sensing of output current. Provided is a technique for accurately sensing the magnitude of output current in coupled inductors. An RC circuit (comprising a resistor and capacitor in series) is connected in parallel with the coupled inductor. The inductor has a leakage inductance Lk and a DC (ohmic) resistance of DCR. The resistor and capacitor are selected such that an RC time constant is equal to an L / R time constant of Lk / DCR. With the matching time constants, a sum of voltages on the capacitors is accurately proportional to a sum of currents flowing in the output inductors. Also provided is a technique for sensing current when an uncoupled center tap inductor is present.
Owner:VIRGINIA TECH INTPROP PROPERTIES
Bandwidth enhancement for a touch sensor panel
InactiveUS20100059294A1Enhancing stimulation signal bandwidthUniform touch sensitivityTransmission systemsInput/output processes for data processingEngineeringCapacitor
A system is disclosed for enhancing the stimulation signal bandwidth for a touch sensor panel and maintaining relatively uniform touch sensitivity over the touch sensor panel surface. In one embodiment, a bandwidth enhancement circuit is coupled in parallel to a sensor circuit. The sensor circuit includes a source of stimulating voltage, a drive line, a sense line, and a charge amplifier. The drive line and the sense line are coupled with each other by a mutual capacitance Csig. The bandwidth enhancement circuit can be a RC circuit coupled in parallel to the sensor circuit. The bandwidth enhancement circuit can be represented by two serially coupled resistors, each of which is also coupled to ground on one end, and two capacitors. In particular, one of the capacitors couples the bandwidth enhancement circuit to the drive line, and the other capacitor couples the bandwidth enhancement circuit to the sense line.
Owner:APPLE INC
Apparatus and method of determining a user selection in a user interface
InactiveUS20060097992A1Cathode-ray tube indicatorsInput/output processes for data processingCapacitanceEngineering
A user interface (210) includes an RC circuit (213). The RC circuit (213) includes a variable capacitance. The variable capacitance is produced by a sensing member (310) in cooperation with a user's finger (311). When a user makes a selection with the user interface (210), the user places a finger (311) in close proximity and in a facing relationship to a section, or discrete surface (320, 322, 324), of the sensing member (310). The discrete surfaces (320, 322, 324) can correspond to keys of a keypad (138) or to directions of a directional button (1030), for example. The time constant of the RC circuit (213) varies according to which discrete surface (320, 322, 324) is determining the capacitance of the RC circuit (213). A controller (118) determines the user's selection based on the time constant of the RC circuit (213).
Owner:MOTOROLA INC
Output buffer with slew rate control and a selection circuit
An output buffer having a controlled output slew rate comprises a first predriver circuit having a first RC circuit and a first output node and a second predriver circuit having a second RC circuit and a second output node. A buffer input node is coupled to the first and second predriver circuits. The output buffer further includes an output circuit having first and second input nodes and a third output node, where the first and second input nodes are coupled, respectively, to the first and second output nodes. The time constants of the RC circuits control a signal slew rate at the third output node of the output circuit, and the value of R may be selected to provide a predetermined, controlled slew rate range at the third output node. A selection circuit aids in the selection of an appropriate value for R.
Owner:ADVANCED MICRO DEVICES INC
Micropower RC oscillator
InactiveUS6462625B2Logic circuits coupling/interface using field-effect transistorsGenerator stabilizationElectrical resistance and conductanceClosed loop
Owner:SAMSUNG ELECTRONICS CO LTD
High voltage ESD protection featuring pnp bipolar junction transistor
InactiveUS20080316659A1Reduce decreaseReduce riskTransistorEmergency protective arrangements for limiting excess voltage/currentCapacitanceDriving current
A protection circuit is disclosed that protects a semiconductor device from damage due to an electrostatic discharge. One such protection circuit comprises a vertical pnp hetero-junction bipolar transistor (HBT) connected between terminals such as supply terminals of the device, configured to conduct during an electrostatic discharge. The protection circuit also comprises a trigger circuit, such as a transient activated RC circuit connected between the terminals to detect the electrostatic discharge and control the transistor based on the detected electrostatic discharge. A Darlington transistor pair in the trigger circuit can be used to multiply the effective capacitance and HBT drive current. The HBT transistor absorbs energy from the electrostatic discharge and clamps the over-voltage across the terminals. The protection circuit may also be used across other I / O terminals of the device.
Owner:TEXAS INSTR INC
Electrostatic discharge circuit and method
A method and integrated circuit renders a shunt structure non-conductive during a power up event or noise event for and in addition, during an electrostatic discharge event, keeps the shunt structure conductive for a period of time to discharge electrostatic energy through the shunt structure. In one example, a shunt structure, such as a transistor, is interposed between a power node and a ground node. Circuitry is operative during a power up event or noise event, to render the shunt structure non-conductive for a period of time during the power up event or during the noise event (when power is applied). Second circuit is operative, during an electrostatic discharge event, to keep the shunt structure conductive for a period of time to discharge electrostatic energy through the shunt structure. In one example, a plurality of resistor / capacitors (RC) circuits are utilized wherein the RC circuits have different time constants. In addition, an ESD feedback circuit is employed in conjunction with control logic to suitably control the ESD control logic during an ESD event. Circuitry is also used during a power up event to render the shunt structure non-conductive.
Owner:ATI TECH INC
PWM buck convertor with overcurrent protection function
InactiveCN101594048AAvoid opening repeatedlyGuaranteed to workApparatus without intermediate ac conversionCapacitanceSignal on
The invention relates to a PWM buck convertor with overcurrent protection function, which comprises a control circuit, a first switching tube connected between an input power source and an inductor, and a current-limit circuit, wherein the current-limit circuit is used for sampling current signals on the first switching tube and outputting overcurrent signals; the control circuit judges whether the overcurrent signals are greater than a preset current maximum to control the connection and cut off of the first switching tube; and the PWM buck convertor is provided with the current-limit circuit, so that a power tube is cut off when the current is increased to the preset current maximum to protect a chip and ensure the normal work of a switch power supply. Furthermore, a capacitor in an RC circuit outputs sampling voltage so as to avoid the influence of power supply voltage vibration on the current-limit circuit in the direct sampling process; when the overcurrent happens, the cut-off time of the power tube is fixed so as to avoid the repeat starting of the power tube in short time and reduce power consumption; and two shifts of cut-off time are automatically selected according to the output voltage of the buck convertor so as to ensure the stability of the output voltage.
Owner:SHENZHEN CHIP HOPE MICRO ELECTRONICS LTD
Switched-mode power supply
The present invention provides a switched-mode power supply. The ripple-control switched-mode power supply integrates a ripple injection function into an feedback voltage in a control circuit without increasing the number of external terminals. The ripple-control switched-mode power supply includes a control circuit 20 to switch on / off a drive switching element SW1 for making current through an inductor. The control circuit comprises: a voltage comparator 23 comparing the feedback voltage with a predetermined voltage; a ripple injection circuit 27, wherein the ripple injection circuit has an integrator outputting an integral of the voltage at the node between the driver switching element and the inductor, and a series RC circuit for adding a ripple component to the feedback voltage; and a control pulse generator 24 generating the control pulse based on an output of the voltage comparator. The switched-mode power supply is configured to switch on / off the drive switching element based on the control ripple generated by the control pulse generator.
Owner:MITSUMI ELECTRIC CO LTD
Lithium-battery variable fractional order and equivalent circuit model and identification method thereof
ActiveCN104392080ADescribe wellImprove featuresSpecial data processing applicationsCapacitanceElectrical battery
The invention discloses a lithium-battery variable fractional order and equivalent circuit model and an identification method thereof. The lithium-battery variable fractional order and equivalent circuit comprises a run time circuit and a battery I-V characteristic circuit, wherein a capacitor in the battery I-V characteristic circuit is a variable fractional order capacitor. A second order RC circuit model is generalized to a non-integer order, and the model parameters and the number of fractional order of different SOC are identified based on a least square method, so that the fractional order and equivalent circuit varying order according to the SOC is obtained. The instruction of fractional order realizes the continuous change of the order number of the model, so that the model is relatively stable, good in dynamic property and high in precision. The variation of fractional order realizes more freedom and more flexibility and innovation of the model. As the number of RC networks is not increased, the fractional order model effectively solves the contradiction between the accuracy and practicality of the model, is suitable for various working conditions of batteries, and has high practical value. The invention provides a precise battery model easy to realize for precise estimation of SOC.
Owner:SHANDONG UNIV
Controller for a vehicle starter motor
InactiveUS6050233AProtection from damageStarter detailsDynamo-electric converter controlElectric powerCapacitor
A controller for a vehicle starter motor, the controller comprising means for applying power to the electric starter motor as a function in particular of the open or closed state of a starter switch, wherein said means include in particular an RC type circuit having a charging time constant that is shorter than its discharging time constant and that charges and discharges depending on whether the starter switch is closed or open, said control means also including means for preventing power being applied to the starter motor when the voltage across the terminals of the capacitor means of the RC circuit exceeds a given threshold.
Owner:VALEO EQUIP ELECTRIC MOTEUR
Wide band RFID system with tag on flexible label
ActiveUS7504952B2Good synchronizationReduce power consumptionSubscribers indirect connectionRecord carriers used with machinesEngineeringWide band antenna
An active radio frequency identification (REID) tag implemented on a flat label. The tag includes a battery printed on the label, a flat wide-band antenna printed on the label and a wide band communication circuit implemented as a chip inlay inside the label. The circuit is attached to the battery and to the antenna. The combined thickness of the battery, the antenna and the circuit as printed on the flexible label is less than one millimeter. The battery, the antenna and the circuit are printed on the label so as to render substantial flexibility to the RFID tag. The circuit operates at a center frequency of at least one gigahertz and a bandwidth at least twenty percent of said center frequency or a bandwidth at least 500 Mhz. The tag typically includes an inaccurate clock source such as an RC circuit and does not include a crystal. Average power consumption of the battery is preferably reduced by operating the tag with a low duty ratio between an active and an inactive interval; and during the active interval transmitting in bursts while turning off parts of the tag between the bursts. The communications circuit performs timing measurements on incoming received waveforms and transmits transmit signals in response to the received waveforms with timing based on the timing measurements. The receiver circuitry locks on a repetition frequency of the incoming received waveforms, and based on the repetition frequency generates a pulse repetition frequency of the transmit signals.
Owner:SANDLINKS
Switched-mode power supply
Provided is a switched-mode power supply. The power supply includes: a DC voltage input terminal; a driver switching element connected to the input terminal; an inductor connected to the driver switching element; an output terminal connected to the inductor and outputting output voltage different from the input voltage; and an integrated circuit outputting control pulses used for on-off control of the driver switching element. The integrated circuit has: a ripple injection circuit adding a ripple component to a feedback voltage of the output voltage; a voltage comparator comparing the summed voltage with a predetermined voltage; and a control pulse generator generating the control pulse based on an output of the voltage comparator. The ripple injection circuit has an integrator outputting an integral of the voltage at the node between the driver switching element and the inductor, and a series RC circuit connected to the output end of the integrator.
Owner:MITSUMI ELECTRIC CO LTD
Remote sensing of remaining battery capacity using on-battery circuitry
ActiveUS20140188413A1Electrical testingSpecial data processing applicationsComputer moduleBattery capacity
A method of remote sensing a charge includes charging or discharging a capacitor of an RC circuit to a predetermined threshold voltage using a power source. A response signal is provided from a communications module to a handheld computing device comprising a reader system once the capacitor reaches the predetermined threshold voltage. An amount of time taken for the handheld computing device to receive the response signal is determined using a processor. The processor determines charge information using the amount of time.
Owner:DURACELL U S OPERATIONS
Micropower RC oscillator
InactiveUS20020000889A1Pulse automatic controlLogic circuits coupling/interface using field-effect transistorsLevel shiftingElectrical resistance and conductance
A micropower RC oscillator having stable frequency characteristics with varying temperature includes a number of inverting circuits which are driven by an external driving voltage and connected in series with each other and an RC circuit having a resistor disposed in between a head-inverter and a tail inverter to form a closed loop and a capacitor disposed between the tail-inverter and the head-inverter. The resistor comprises a plurality of unit resistors constituting of a P+ diffusion resistor and a polysilicon resistor having opposing characteristics with respect to temperature variation at a predetermined ratio. A resistance regulator controls the resistance of the resistor by decoding an external resistance setting data to select a unit resistor that determines the oscillation frequency effectively. A driving voltage circuit receives a reference signal having the voltage level which is stable against the temperature variation by using a current source and a load having opposing characteristics with respect to the temperature variation and provides as a driving voltage of the RC oscillating circuit after increasing a fan-out capacity of the reference signal. An output level shifting circuit can be added to the rear side of the RC oscillating circuit to adjust the voltage level of the oscillation signal with the appropriate standard required at a receiving end.
Owner:SAMSUNG ELECTRONICS CO LTD
ESD detection circuit and related method thereof
ActiveUS20100148797A1Eliminate unwanted leakage currentEliminates the excessive unwanted leakage currentSemiconductor/solid-state device detailsSolid-state devicesCapacitanceEngineering
An electro-static discharge (ESD) detection circuit is provided. The ESD detection circuit includes: a first power pad for receiving a first supply voltage; a second power pad for receiving a second supply voltage; an RC circuit having an impedance component coupled between the first power pad and a first terminal and having an capacitive component coupled between the first terminal and a second terminal, wherein the second terminal is not directly connected to the second supply voltage; a trigger circuit couples to the first power pad, the second power pad, and the RC circuit, for generating an ESD trigger signal according to a voltage level at the first terminal and a voltage level at the second terminal, and a bias circuit coupled between the first power pad and the second power pad for providing a bias voltage to the second terminal.
Owner:FARADAY TECH CORP
Integrated circuitry for generating a clock signal in an implantable medical device
Timer circuitry completely formable in an integrated circuit (IC) for generating a clock signal in an implantable medical device is disclosed. The timer circuitry can be formed on the same Application Specific Integrated Circuit typically used in the implant, and requires no external components. The timer circuitry comprises modification to a traditional astable timer circuit. A resistance in the disclosed timer circuit can be trimmed to adjust the frequency of the clock signal produced, thus allowing that frequency to be set to a precise value during manufacturing. Precision components are not needed in the RC circuit, which instead are used to set the rough value of the frequency of the clock signal. A regulator produces a power supply for the timer circuitry from a main power supply (Vcc), producing a clock signal with a frequency that is generally independent of temperature and Vcc fluctuations.
Owner:BOSTON SCI NEUROMODULATION CORP
Semiconductor integrated circuit device
InactiveUS7440248B2Reduce voltageIncrease resistanceTransistorEmergency protective arrangements for limiting excess voltage/currentEngineeringSemiconductor
A semiconductor integrated circuit device includes: a protected circuit protected against electro-static discharge applied from outside the device; an SCR protection circuit having an anode terminal connected to a power line, a cathode terminal connected to a ground line and a trigger terminal; and a trigger circuit connected to the trigger terminal and including an RC circuit connected between the power line and the ground line.
Owner:PANASONIC CORP
Resistor/Capacitor Based Identification Detection
ActiveUS20080042701A1Low costPulse automatic controlPrinted circuit aspectsCapacitanceRC time constant
A resistor / capacitor identification detection (RCID) circuit may provide system level identification of hardware (e.g. circuit board ID) through a single pin interface, by identifying up to a specified number of more than two quantized RC time constant states by measuring the discharge and charge times of an external RC circuit coupled to the single pin. The RCID circuit may initiate the discharge followed by a charging of the external RC circuit. The signal developed at the signal pin may be provided to the input of a threshold detector, with the threshold set at a specified percentage of a supply voltage used for operating the RCID circuit. The digitized output of the threshold detector may be used to gate a counter, after having been filtered through an input glitch rejection filter. A resolution of the counter may be determined by a high frequency clock used for clocking the counter. The numeric values of the charge and discharge times may be stored in data registers comprised in the RCID circuit.
Owner:MICROCHIP TECH INC
Method for faulty indication and subsection of power system low current grounding
ActiveCN101201379AIncreased inductive reactanceReduce manufacturing costEmergency protective circuit arrangementsFault locationCapacitanceTransient state
An indication and sectionalizing method of the small current grounding fault of the power system relates to the detecting field of the grounding fault of the power system. The method is characterized in that the back zero sequence equivalent capacity of the detecting point is estimated, simultaneously the related information of the transient phase voltage and the transient zero sequence current caused by the fault is utilized as the basis of the fault indication and sectionalizing. The back zero sequence equivalent capacity of the detecting point is estimated according to the collected transient phase voltage and the transient zero sequence current after the fault, and whether the fault detecting device is actuated to alarm is determined according the value of the zero sequence capacitor. The method has the advantages of only need of one phase voltage transformer for realization, effective decrease of the production cost, obtaining the phase voltage signal for the cable line via the sheet iron that is covered on the line and grounded via the RC circuit, being simple and feasible, higher amplitude of the transient signal than that of the stationary signal and easy detecting, and no influence from the grounding mode of the neutral point of the system.
Owner:SHANDONG KEHUI POWER AUTOMATION
Output current sharing
A regulator with output current sharing including an output node and multiple converters. Each converter includes a PWM controller and switch circuit, an inductor, and an RC circuit. Each PWM controller and switch circuit receives a corresponding rail voltage and has a phase node and a regulation feedback input. Each inductor has a first end coupled to the output node and a second end coupled to a corresponding phase node. The RC circuit is coupled across the inductor and has an intermediate phase sense node coupled to a corresponding regulation feedback input. Each RC circuit may include an RC filter coupled across an inductor with an intermediate node and a feedback circuit coupled between the intermediate node and a regulation feedback input. The RC circuits may be configured to program a relative power distribution between the rail voltages to the shared output.
Owner:INTERSIL INC
Remote sensing of remaining battery capacity using on-battery circuitry
ActiveUS9551758B2Material analysis by electric/magnetic meansElectrical testingElectrical batteryEngineering
Owner:DURACELL U S OPERATIONS INC
Dimming method applicable to traditional dimmers and LED dimmable drive power
InactiveCN101646288AShock-resistantSolution to short lifeElectrical apparatusElectric light circuit arrangementEngineeringShock resistance
The invention relates to a dimming method applicable to traditional dimmers and an LED dimmable drive power. The method comprises the following steps: converting PWM signals determined by the phase ofthe angle of flow into DC signals through a phase test circuit after being filtered by a RC circuit, and magnifying the signals to control the changes of the resistance value of a constant-current sampling resistor so as to regulate the magnitude of the LED current. The invention can regulate the brightness of an LED bulb by the traditional dimmer, so that people can conveniently change the traditional incandescent bulb lamp into the LED bulb lamp with the ideal stepless dimming function. The LED has the characteristics of long service life, no mercury pollution or ultraviolet pollution, highlight efficiency, shock resistance, energy saving and the like, and belongs to a new generation of green light sources. Therefore, the invention has the advantages of favorable dimming effect (1-100%of continuous stepless dimming), soft light color, environmental protection and energy saving.
Owner:GUANGZHOU BODI LIGHTING & ELECTRICAL MFG CO LTD
Outer watchdog circuit
ActiveCN101165656AAdjustable widthAs soon as possibleError detection/correctionElectricitySignal source
The circuit comprises: a watch-dog chip (U1) whose dog-feeding input end (WDI) is connected to the dog-feeding signal source, and whose reset output end (RST) is used for outputting a reset signal; a first order RC circuit connected to the power failure detection input (PFI) of the watch-dog chip (U1) and used for adjusting the time length in which the input voltage of said PFI is made to equal to the reference voltage; the power failure detection output end (PFO) is connected to the reset input end (MR); the state of both PFO and MR are the same high level or low level. The invention can be used for disabling the watch-dog when the CPU is powered on.
Owner:VERTIV CORP
Active snubber
InactiveUS20060244428A1Less power dissipationAvoid dischargeEfficient power electronics conversionEmergency protective circuit arrangementsElectrical resistance and conductanceSnubber
An improved snubber is electrically switched to close a current path to a capacitor (C) in a series connected RC circuit at the onset of an abrupt voltage change otherwise producing ringing in a resonant circuit to which the snubber circuit is connected. The current path to the capacitor (C) is then interrupted before the capacitor (C) discharges and thereafter at each such voltage change in the resonant circuit the capacitor (C) is no longer charged from its totally discharged state but nevertheless damps the ringing by virtue of current flow to the nearly completely charged capacitor (C). By preventing complete charging and discharging of the capacitor (C) in the RC circuit every cycle, power dissipation in the resistance of the snubber circuit is greatly reduced.
Owner:DET INT HLDG LTD
Apparatus and methods for eliminating DC offset in a wireless communication device
ActiveUS20050277396A1Dc level restoring means or bias distort correctionRadio transmissionAudio power amplifierVariable-gain amplifier
Apparatus and methods for eliminating DC offset in a wireless communication device operable on a continuous basis or on a sampled basis. In a receive channel, the output of a forward variable gain amplifier is fed back to an RC circuit to charge the capacitor (C) to a voltage dependent on the DC offset in the variable gain amplifier output. The voltage on the capacitor is amplified and summed with the input to the variable gain amplifier. The RC circuit is configured to provide a high gain feedback at DC and very low frequencies, but very low gain at signal frequencies. Preferably the output of the forward variable gain amplifier is fed back to the RC circuit with a gain that is inversely proportional to the forward gain. Disconnection of the capacitor and feedback of the capacitor voltage provides sampled operation. Various embellishments and sample applications are disclosed.
Owner:THETA IP
Programmable integrated microphone interface circuit
ActiveUS20090110213A1Reduce impactReduce noiseTransducer acoustic reaction preventionElectrostatic transducersAudio power amplifierIntegrator
An integrated circuit for providing programmable microphone interface includes an input terminal for receiving an input signal and an output terminal for providing an output audio signal. The integrated circuit includes a bias circuit, an amplifier circuit, and two feedback circuits. The bias circuit provides a microphone bias signal to the microphone and provides a sensed microphone signal. The amplifier circuit includes a first input, a second input, and an output. The first input is configured to receive the sensed microphone signal, a first feedback signal, and a second feedback signal. The second input is configured to receive a first reference signal. The feedback circuits are in communication with the output and the first input of the amplifier circuit. In a specific embodiment, the first feedback circuit includes an RC circuit and the second feedback circuit includes an integrator.
Owner:WINBOND ELECTRONICS CORP
True root mean square value detection-based soil moisture sensor
ActiveCN102023182AImprove developmentImprove adaptabilityMaterial analysis by electric/magnetic meansMoisture content investigation using microwavesCapacitanceSignal on
The invention relates to a true root mean square value detection-based soil moisture sensor, which comprises a power supply filter circuit, an active crystal oscillator, a Schmidt trigger, a signal attenuator, a probe and a true root mean square value detector. The Schmidt trigger shapes a high-frequency sine wave or square wave signal output by the active crystal oscillator into a standard waveform square wave signal, the amplitude of the standard waveform square wave signal is reduced by the signal attenuator, a resistor-capacitor (RC) circuit consisting of the signal attenuator and the probe is charged and discharged periodically, a periodic charging and discharging curve waveform is obtained on the probe, and the true root mean square value detector converts a waveform signal on the probe into equivalent direct current voltage serving as a sensor output signal. When soil moisture is different, the equivalent capacitance of the probe is different, the charging and discharging waveforms are different, and the final output signals are different, so that the soil moisture is measured according to the principle. The soil moisture sensor has the characteristics of simple structure, small volume, low power consumption, low cost, high soil adaptability, simple input / output interface and the like, is easy to apply and facilitates the development of secondary instruments.
Owner:SOUTH CHINA AGRI UNIV
System and method for reducing the size of RC circuits
InactiveUS7243313B1Computer aided designSoftware simulation/interpretation/emulationComputer scienceRC circuit
Owner:CADENCE DESIGN SYST INC
Circuit simulation model of capacitor, constructing method of simulation model, method of circuit simulation, circuit simulator
ActiveUS20120185223A1Inconvenient to usePrecise changeComputation using non-denominational number representationComputer aided designLow-pass filterEngineering
Provided is a circuit simulation model that can suitably represent capacitor characteristics, thereby realizing accurate circuit design and circuit analysis. A SPICE model is constituted of a capacitor unit in which a capacitor is replaced with a linear voltage dependent current source, a low-pass filter unit that has a function of extracting a DC bias voltage, a calculation circuit unit that is configured by combining an adder, a multiplier, and the like to perform a calculation of a circuit equation derived from an equivalent circuit for a capacitor such as an idealized C circuit model, an RC circuit model, or the like, and a linear voltage dependent voltage source that applies a total voltage applied across the capacitor to the calculation circuit.
Owner:TAIYO YUDEN KK
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