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43results about "Pulse generation by vacuum tubes" patented technology
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Programmable receiver equalization circuitry and methods
InactiveUS20070014344A1Reduce high frequency noiseReduce gainMultiple-port networksTransmission control/equlisationCrosstalk cancellationEqualization
Data signals transmitted over transmission media suffer from attenuation caused by the transmission media. Equalization circuitry may be provided to compensate for attenuation caused by the transmission media. Equalization circuitry may include multiple stages arranged in series to allow the frequency responses of the stages to aggregate together. Each stage may be programmable to insert a zero, which causes the frequency response of the stage to increase in magnitude by 20 dB / decade. The frequency location of the zero may also be programmable to allow each stage to contribute a certain amount of gain for a specific frequency. Each stage may also be programmable to determine the location of poles for reduction of high frequency noise and cross-talk cancellation.
Owner:ALTERA CORP
RC oscillator integrated circuit including capacitor
ActiveUS7420431B2Pulse generation by bipolar transistorsPulse generation by vacuum tubesEngineeringRC oscillator
An RC oscillator integrated circuit includes: an active current mirror connected to an external resistor, for receiving a current signal corresponding to a voltage signal applied to the external resistor, performing 1 / N-times division of the received current signal according to an input clock signal, and generating a 1 / N-times current signal; an oscillation circuit for generating an output voltage corresponding to a charging- or discharging-operation of a capacitor via a current path formed by the active current mirror; a feedback switching circuit for controlling a charging- or discharging-path of the capacitor by a feedback of an output signal Vo of the oscillation circuit; and a divider for generating not only a first clock signal capable of driving the active current mirror according to the output signal of the oscillation circuit, but also a second output clock signal having a compensated mismatch of the active current mirror.
Owner:SEMICON COMPONENTS IND LLC
Oscillator and electronic apparatus using the same
ActiveUS20050116780A1Reduce power consumptionEasy constructionPulse generation by vacuum tubesPulse automatic controlEngineeringRunning time
An oscillator operated with an external power source or an external save power source is provided comprising: a clock signal generation unit for generating and outputting a clock signal; a power-on detection unit for detecting the power-on of the external power source; a power-off detection unit for detecting the power-off of the external power source; a running time count unit for counting the running time from a time of the power-on detection signal being input to a time of the power-off detection signal being input; storage means for storing accumulated running time up to a power-on time of the external power source; and a control unit for reading the running time at the time of the power-off detection signal being input, reading the accumulated running time from the storage means, adding the running time to the accumulated running time, and storing the addition result as a new accumulated running time in the storage means.
Owner:SEIKO EPSON CORP
Oscillator apparatus and method with wide adjustable frequency range
ActiveUS8890630B2Less complexLow costPulse generation by bipolar transistorsPulse generation by vacuum tubesConstant frequencyEngineering
An oscillator formed from low cost discrete semiconductors and passive devices creates a linear periodic ramp of constant frequency with ramp slope based on an external voltage signal. Parameters are stable over a wide range of temperatures and variations of transistor parameters that normally degrade in extreme environments. The oscillator period can be phase and frequency synchronized to an external clock source over a wide range of frequencies. The oscillator ramp generator phase can be synchronized on a cycle by cycle basis for incorporation in power converters employing spread spectral EMI reduction techniques, multi-converter systems employing clock interleaving for distribution bus filter optimization, and resonant mode converters employing zero voltage switching techniques. Oscillator ramp rate is independent of frequency and can be synchronized to DC (inhibit) for use in ultra low power burst mode power conversion.
Owner:CRANE ELECTRONICS INC
RC oscillator integrated circuit including capacitor
ActiveUS20070146087A1Pulse generation by bipolar transistorsPulse generation by vacuum tubesEngineeringRC oscillator
An RC oscillator integrated circuit includes: an active current mirror connected to an external resistor, for receiving a current signal corresponding to a voltage signal applied to the external resistor, performing 1 / N-times division of the received current signal according to an input clock signal, and generating a 1 / N-times current signal; an oscillation circuit for generating an output voltage corresponding to a charging- or discharging-operation of a capacitor via a current path formed by the active current mirror; a feedback switching circuit for controlling a charging- or discharging-path of the capacitor by a feedback of an output signal Vo of the oscillation circuit; and a divider for generating not only a first clock signal capable of driving the active current mirror according to the output signal of the oscillation circuit, but also a second output clock signal having a compensated mismatch of the active current mirror.
Owner:SEMICON COMPONENTS IND LLC
Oscillator and electronic apparatus using the same
ActiveUS6952139B2Reduce power consumptionEasy constructionPulse generation by vacuum tubesPulse automatic controlEngineeringRunning time
Owner:SEIKO EPSON CORP
Circuit and method for contact-less transmission
InactiveUS20070070951A1Improved contact-less transmission of signalQuality improvementPulse generation by vacuum tubesTransformersElectromagnetic couplingInductor
A system includes a first and second circuit electromagnetically coupled to establish a contact-less transmission, for example, between a vehicle body and a removable seat of the vehicle body. The first circuit includes a first inductor and the second circuit includes a second inductor. In order to detect in the first circuit the status of one or more input signals of the second circuit, the second circuit includes a signal generating portion including a resistor and a capacitor that generates, a time-pulsed signal. The second circuit is adapted to set a value of at least one of the resistor and the capacitor based on a sensed parameter and sets a duty cycle of the time-pulsed signal based on a value of at least one of the resistor and the capacitor. The time-pulsed signal changes a load of the second circuit over time which can be detected in the first circuit.
Owner:TYCO ELECTRONICS BELGIUM EC
Programmable receiver equalization circuitry and methods
InactiveUS7697600B2High frequency responseReduce gainMultiple-port networksTransmission control/equlisationUltrasound attenuationData signal
Data signals transmitted over transmission media suffer from attenuation caused by the transmission media. Equalization circuitry may be provided to compensate for attenuation caused by the transmission media. Equalization circuitry may include multiple stages arranged in series to allow the frequency responses of the stages to aggregate together. Each stage may be programmable to insert a zero, which causes the frequency response of the stage to increase in magnitude by 20 dB / decade. The frequency location of the zero may also be programmable to allow each stage to contribute a certain amount of gain for a specific frequency. Each stage may also be programmable to determine the location of poles for reduction of high frequency noise and cross-talk cancellation.
Owner:ALTERA CORP
Crystal oscillator
ActiveUS20070024386A1Increase valuePulse generation by vacuum tubesGenerator stabilizationEngineeringMemory circuits
A crystal oscillator that outputs an oscillation output signal of an oscillator circuit oscillated by a crystal resonator as a resonation source via a buffer circuit, includes: a plurality of waveform output circuits provided in the buffer circuit, each converting, when inputted, the oscillation output signal into a different waveform and outputting the converted signal; a circuit selection switch that selects any one of the plurality of waveform output circuits as a waveform output circuit of the buffer circuit; and a memory circuit that stores data used by the circuit selection switch to select any one of the waveform output circuits.
Owner:SEIKO EPSON CORP
Electric signal outputting apparatus, semiconductor laser modulation driving apparatus, and image forming apparatus
InactiveUS20070126517A1Eliminate the problemInput/output impedence modificationMultiple input and output pulse circuitsElectricityEngineering
The present invention discloses an electric signal outputting apparatus in a serial electric transmission system. The electric signal outputting apparatus includes a switching part for switchably generating high and low output signals in accordance with signal data and transmitting the output signals to a transmission path, an impedance matching part for matching an output impedance to the impedance of the transmission path, and an auxiliary switching part for subsidiarily supplying current to an output node in the transmission path and subsidiarily absorbing current from the output node in the transmission path when the switching part switches the generation between high and low output signals, wherein the auxiliary switching part conducts the supplying and the absorbing for a period shorter than a pulse width of a reference clock of the serial electric transmission system.
Owner:RICOH KK
Variable frequency relaxation oscillator
ActiveUS9401703B1Exclusive-OR circuitsMultiple input and output pulse circuitsControl signalRelaxation oscillator
A relaxation oscillator system has a relaxation oscillator and a frequency control (FC) unit. The oscillator includes first and second oscillator sub-circuits and a latch. The first and second oscillator sub-circuits receive from the FC unit, respectively, first and second control signals for controlling corresponding outputs provided to the latch by the first and second oscillator sub-circuits. The latch outputs a variable frequency feedback signal provided to the FC unit. The FC unit receives a frequency control signal for controlling the frequency of an oscillator output signal and generates the first and second control inputs based on the frequency control signal and the feedback signal so that changes to the oscillator frequency are implemented by each oscillator sub-circuit while that sub-circuit is in an idle state to avoid glitches in the oscillator output signal.
Owner:NXP USA INC
Random Delay Generation for Thin-Film Transistor Based Circuits
InactiveUS20100295661A1Low costReadily apparentSemiconductor/solid-state device testing/measurementSolid-state devicesEngineeringRandom delay
Circuits and circuit elements configured to generate a random delay, a monostable oscillator, circuits configured to broadcasting repetitive messages wireless systems, and methods for forming such circuits, devices, and systems are disclosed. The present invention advantageously provides relatively low cost delay generating circuitry based on TFT technology in wireless electronics applications, particularly in RFID applications. Such novel, technically simplified, low cost TFT-based delay generating circuitry enables novel wireless circuits, devices and systems, and methods for producing such circuits, devices and systems.
Owner:ENSURGE MICROPOWER ASA
Circuit and method for contact-less transmission
InactiveUS7639095B2Improved contact-less transmission of signalQuality improvementPulse generation by bipolar transistorsPulse generation by vacuum tubesElectromagnetic couplingEngineering
A system includes a first and second circuit electromagnetically coupled to establish a contact-less transmission, for example, between a vehicle body and a removable seat of the vehicle body. The first circuit includes a first inductor and the second circuit includes a second inductor. In order to detect in the first circuit the status of one or more input signals of the second circuit, the second circuit includes a signal generating portion including a resistor and a capacitor that generates, a time-pulsed signal. The second circuit is adapted to set a value of at least one of the resistor and the capacitor based on a sensed parameter and sets a duty cycle of the time-pulsed signal based on a value of at least one of the resistor and the capacitor. The time-pulsed signal changes a load of the second circuit over time which can be detected in the first circuit.
Owner:TYCO ELECTRONICS BELGIUM EC
Crystal oscillator
ActiveUS7348859B2Increase valuePulse generation by vacuum tubesGenerator stabilizationMemory circuitsEngineering
A crystal oscillator that outputs an oscillation output signal of an oscillator circuit oscillated by a crystal resonator as a resonation source via a buffer circuit, includes: a plurality of waveform output circuits provided in the buffer circuit, each converting, when inputted, the oscillation output signal into a different waveform and outputting the converted signal; a circuit selection switch that selects any one of the plurality of waveform output circuits as a waveform output circuit of the buffer circuit; and a memory circuit that stores data used by the circuit selection switch to select any one of the waveform output circuits.
Owner:SEIKO EPSON CORP
Electric signal outputting apparatus with a switching part, an impedance matching part, and an auxiliary switching part
InactiveUS7863946B2Input/output impedence modificationMultiple input and output pulse circuitsElectricityEngineering
Owner:RICOH KK
Stability controlled high frequency chopper-based oscillator
ActiveUS20160322981A1Pulse generation by vacuum tubesPulse automatic controlSignal responseControl circuit
Circuitry for providing an oscillating output signal. This circuitry includes a transconductance circuit having a first input, a second input, an output. The transconductance also includes a first transistor, a second transistor, and chopping circuitry. The chopping circuitry is for alternatively connecting, in a first clock cycle phase, a first node to a first terminal of the first transistor and a second node to a first terminal of the second transistor and, in a second clock cycle phase, following the first clock cycle phase, the first node to the first terminal of the second transistor and the second node to a first terminal of the first transistor. An oscillator circuit is also included and coupled to receive voltage from the output of the transconductance circuit, wherein the oscillating output signal is responsive to an output of the oscillator circuit. Further connected to the transconductance circuit are circuitry for providing a first voltage to its first input and a frequency controlled circuit for providing a second voltage to its second input.
Owner:TEXAS INSTR INC
PWM signal generating circuit
InactiveUS7583158B2Pulse generation by vacuum tubesOscillations generatorsImage resolutionEngineering
A PWM signal generating circuit according to the invention includes a digital PWM signal generating circuit that generates a digital PWM signal having a resolution of 2n based on a clock signal CLK and n-bits (n≧1) of digital information; a triangular wave generator that generates a triangular wave (e.g. ramp wave) synchronized with the clock signal CLK; and a comparator that compares the triangular wave with a threshold value. The PWM signal generating circuit increases the resolution of the digital PWM signal based on an output from the comparator.
Owner:TOYOTA JIDOSHA KK
Comparator and relaxation oscillator employing same
ActiveUS20140028408A1Multiple input and output pulse circuitsPulse generation by vacuum tubesEngineeringRelaxation oscillator
A relaxation oscillator has a comparator that includes first through third bias current transistors coupled to a first supply rail. First and second input transistors form a pair of parallel coupled transistors connected to the first bias current transistor. A first current mirror control transistor connects the first input transistor to a second supply rail. A first current mirror output transistor is coupled to the first current mirror control transistor, and connects the second bias current transistor to the second supply rail. A second current mirror control transistor connects the second input transistor to the second supply rail. A second current mirror output transistor is coupled to the second current mirror control transistor, and connects the third bias current transistor to the second supply rail. A transition time reduction transistor, coupled across the third bias current transistor, is coupled to the second bias current transistor, and provides a comparator output.
Owner:NXP USA INC
Quadrature signal generator for tuning phases of all of four generated quadrature signals
InactiveUS7397317B2Multiple-port networksPulse generation by vacuum tubesDifferential signalingEngineering
A quadrature signal generator capable of phase-tuning with respect to all of four generated quadrature signals. The quadrature signal generator includes four phase tuning units each having two input terminals, one receiving a differential signal, the other being grounded, and changing a phase of the differential signal to thereby generate quadrature signals. Accordingly, it is possible to tune phases of all the four generated quadrature signals. It is also possible to prevent the amplitude of quadrature signals from being deviated from a reference value.
Owner:SAMSUNG ELECTRONICS CO LTD
Relaxation oscillator circuit including two clock generator subcircuits having same configuration operating alternately
InactiveUS20130049875A1Pulse generation by vacuum tubesPulse manipulationVoltage converterCurrent voltage
A control circuit controls first and second clock generator subcircuits so that one subcircuit of the first and second clock generator subcircuits operates for a comparison voltage generating interval, then another subcircuit operates for a clock generating interval, and so that the first and second clock generator subcircuits alternately repeat processes of the comparison voltage generating interval and the clock generating interval. For the comparison voltage generating interval, each of the first and second clock generator subcircuits is controlled to generate a comparison voltage and output the same voltage to an inverted output terminal of a comparator. For the clock generating interval, each of the first and second clock generator subcircuits compares an output voltage from a current-voltage converter circuit with the comparison voltage.
Owner:SEMICON TECH ACADEMIC RES CENT
Multivibrator protected against current or voltage spikes
ActiveUS20060255870A1Improve protectionPulse generation by vacuum tubesDigital storageVoltage spikeEngineering
The multivibrator is protected against current or voltage spikes and includes a first data transfer port that receives, as input, multivibrator input data, and a first / master latch cell connected on the output side of the first transfer port. A second / slave latch cell is included, and a second data transfer port is placed between the first and second latch cells. Each latch cell includes a set of redundant data storage nodes. The transfer ports each circuits / devices for writing data separately into each storage node.
Owner:STMICROELECTRONICS SRL
Bias circuit for supplying a bias current to a RF power amplifier
ActiveUS10141892B1Improve linearityAmplifier modifications to reduce non-linear distortionPulse generation by vacuum tubesPower flowEngineering
A bias circuit for supplying a bias current to a RF power amplifier by using at least two voltage reference circuits coupled between the base terminal of a bipolar transistor and a voltage supply for generating a bias current to the RF power amplifier, wherein each of the at least two voltage reference circuits respectively clamps to a reference voltage at a corresponding terminal node of the voltage reference circuit on a conductive path having a current flowing from the voltage supply to the base terminal of the bipolar transistor, wherein when the current flowing out of the voltage supply increases, the current flowing through each of the at least two voltage reference circuits will also increases, so that the variation range of the bias current to the RF power amplifier will be kept in a smaller range compared with the variation range of the current flowing out of the power supply, thereby increasing the linearity of the RF power amplifier.
Owner:RAFAEL MICROELECTRONICS INC
Multivibrator with reduced average offset voltage
InactiveUS20060181360A1Change in oscillator frequencyChange in pulse widthPulse generation by vacuum tubesEngineeringComparator
This invention relates to monostable and astable multivibrators in which the pulse width or frequency stability, respectively is increased by reducing the effect of the comparator input offset voltage. The reduction is accomplished by alternately reversing the input connections to the comparator.
Owner:MIROW FRED
Voltage controlled oscillator and electronic system using the same
InactiveUS6943638B1Increase input voltagePulse generation by vacuum tubesPulse automatic controlElectronic systemsVoltage reference
A voltage controlled oscillator comprises two XOR logic units and two inverters. A first inverter inverts a first XOR result into a first output signal; a second inverter inverts a second XOR result into a second output signal; a first XOR logic unit performs an XOR logic operation based on an input signal and the second output signal and thus generating the first XOR result; and a second XOR logic unit performs an XOR logic operation based on the first output signal and a reference voltage and thus generates the second XOR result.
Owner:INNOLUX CORP
High frequency amplifier circuit and mobile communication terminal using the same
InactiveUS7239205B2Small sizeSimple control methodMultiple-port networksPulse generation by vacuum tubesEngineeringVoltage reference
A first FET is inserted in a series position between a signal input terminal and a signal output terminal, while second and third FETs are inserted in a shunt position respectively between the signal input terminal and a ground terminal and between the signal output terminal and a ground terminal. First and second reference voltage terminals and a control terminal are provided. A first reference voltage and a control voltage are applied to the first FET, while a second reference voltage and a control voltage are applied respectively to the second and third FETs, so that the first, second, and third FETs serve as variable resistors. As such, a gain control circuit is constructed. Further, a first resistor is provided in parallel to the first FET, while second and third resistors are provided respectively in series to the second and third FETs.
Owner:PANASONIC CORP
Oscillation circuit and operation method thereof
InactiveUS20050184821A1Variation in oscillation frequencySuppresses the influence of the variation in threshold voltagesPulse generation by bipolar transistorsPulse generation by vacuum tubesCharge currentCharge discharge
An oscillation circuit has: a first MOS transistor having a gate connected to a first node and a source connected to the ground; a second MOS transistor having a gate connected to a second node and a source connected to the ground; a current supply circuit supplying a control current; a threshold correction circuit supplying a correction current; and a charge-discharge circuit which supplies a charge current which is a superposition of the control current and the correction current to the first node and the second node alternately in response to potentials of drains of the first and the second MOS transistors. The threshold correction circuit increases the correction current as threshold voltages of the first and the second MOS transistors become large.
Owner:NEC ELECTRONICS CORP
Circuits, apparatuses, and methods for delay models
ActiveUS8797080B2Pulse generation by vacuum tubesDelay line applicationsEngineeringElectrical and Electronics engineering
Circuits, apparatuses, and methods are disclosed for delay models. In one such example circuit, a first delay model circuit is configured to provide a first output signal by modeling a delay of a signal through a path. A second delay model circuit is configured to provide a second output signal by modeling the delay of the signal through the path. A compare circuit is coupled to the first and second delay model circuits. The compare circuit is configured to compare a third signal from the first delay model circuit and a fourth signal from the second delay model circuit, and, in response provide an adjustment signal to adjust the delay of the second delay model circuit.
Owner:MICRON TECH INC
Oscillator circuit
ActiveUS8643442B2Reduce decreaseReduce impactPulse generation by bipolar transistorsPulse generation by vacuum tubesSeries compensationCharge rate
Owner:NXP USA INC
Multiple level transmitter and method of transmitting
InactiveUS20050243650A1Ultrasonic/sonic/infrasonic diagnosticsPulse generation by vacuum tubesSonificationAudio power amplifier
Transmitters for generating multilevel transmit waveforms for medical diagnostic ultrasound are provided. Voltages from a plurality of sources are superposed or summed. Switches control the amplitude and polarity of the summed voltages so that a transmit waveform having four or more, such as nine, voltage levels is provided. A simple switching pulser without a power amplifier combines voltages applied to two or more flux paths in a third flux path. Superposition of magnetic flux in the third flux path provides for an output voltage responsive to the sum and difference of two different voltages. Alternatively or additionally, the secondary windings of multiple transformers are connected in series with a transducer element. By providing different input voltages to each of the transformers, the multilevel transmit waveform is generated.
Owner:PETERSEN DAVID A +1
Power-saving multibit delta-sigma converter
ActiveCN1943117BImprove signal qualityReduce the number of bitsReconfigurable analogue/digital convertersPulse generation by vacuum tubesDifferential signalingAnalog signal
A power-saving multi-bit delta-sigma-converter (1) has an input (2) for analog signal (ZA) and an output for a digital output signal (ZD), a D / A converter (4), a summation device (5) for providing the difference between the input signal and the feedback signal (Z3), a filter (6) for the difference signal (Z1), a clocked quantization device (7) for quantizing the filtered difference signal (Z2) tothe digital output signal (ZD) with bit-width N. The quantization device (7) has less than (2 power N)-1 comparators which compare the filtered signal (Z2) with a reference potential associated with each one of the comparators, and output the result at a decoder.Decoder produce digital output signal coming from comparison result, and update the reference potential according to the comparison result.
Owner:INFINEON TECH AG
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