931 results about "Analog control" patented technology

Linear lighting systems and methods. In one example, two or more lighting elements having an essentially linear or curvilinear shape are coupled together to form a lighting system. Each lighting element includes a group of LEDs arranged so as to illuminate the essentially linear or curvilinear shape of the lighting element. Each element may include LEDs to generate the same color light, and / or LEDs to generate light of different colors. Additionally, each element may include one or more controllers to control the LEDs so as to create a variety of temporal and / or color-oriented lighting effects. The controller(s) may employ one or more of a variety of control techniques to control the LEDs, such as those involving analog control signals or pulse-width modulated (PWM) control signals. The lighting elements of the system may each be configured as a “stand alone” unit working within the system, producing respective lighting effects that may or may not be coordinated with each other. Alternatively, two or more elements of the system may be configured as addressable lighting elements to facilitate coordination of the elements as a networked lighting system. Any of the foregoing linear lighting systems may be used in a variety of interior or exterior, as well as direct or indirect, lighting applications. In one example, such lighting systems are particularly well-suited as replacements or substitutes for neon lighting installations.

A thermostat providing modulated or analog control of valves or dampers of an air management system. This permits operating a single cooling or heating stage with partially open valves or dampers as needed, since one full stage that is either fully on or off may not be easy to manage for effective air management of a particular type of building, zone or facility. The thermostat may also provide non-modulated control of multi-stage cooling and heating systems. The thermostat may even be used to control a modulated system having more than one stage of cooling or heating.

A system and method for supplying power to a load and for controlling the power factor presented to the power line. Output voltage is controlled by a digital, outer, control loop, and inner, analog, control loop causes the input current to be substantially proportional to the input voltage at any particular point in the power line cycle. Thus, the system presents a load to the power line that appears to be purely resistive. The use of an analog multiplier is not required, nor is sampling of input voltage. Limiting of inrush current provides for brown-out protection and soft-start.

A control circuit for a lighting system allows analog control over a first range of illumination intensities in which the intensity of the illumination source varies in proportion to the voltage level of the control signal. The circuit provides for improved dimming and color mixing capability by allowing pulse width or frequency modulation control in addition to analog control over a second range of illumination intensities.

An analog control circuit is coupled to an apparatus having a variable characteristic over an operating range. A sensing circuit is coupled to the apparatus and the control circuit during the range of operation of the apparatus and is operative to sense the variable characteristic. The operating parameter of the apparatus is controlled to be set at a level corresponding to a prescribed criterion, which may be a maximum or minimum, of the characteristic sensed over the range of operation.

The invention provides a multi-sensor integrated synchronous control method and a multi-sensor integrated synchronous control system for high-precision time-space data acquisition. The method comprises the following steps of: establishing a time-space reference circuit which provides time reference and space reference; establishing a linear reference coordinate system through the time reference and the space reference, and implementing conversion between the linear reference coordinate system and a geodetic coordinate system; sending an analog control signal to an active synchronous sensor according to the preset parameters to realize synchronous control of the active synchronous sensor; and receiving an external event pulse signal, and responding to the interruption generated by the external event pulse signal to realize synchronous control of a passive synchronous sensor. An active synchronous control circuit and a passive synchronous control circuit are provided; and based on the time and space references provided by the time-space reference circuit, the circuits can expand random multiple sensor synchronous control cases aiming at different sensors and control requirements, and have extremely strong expansion and flexible functions.

A new sensing technology for chemical / biomolecular sensors is provided. One such sensor detects molecular hydrogen (H2) using nanoelectronic components. A tiny, low-cost nanosensor chip can offer: (i) performance that matches or exceeds that of existing technology, (ii) plug-and-play simplicity with both digital and analog control systems, and (ii) the small size and low power consumption needed for wireless integration.

An adapter that allows digital imaging devices to be used with existing analog consoles. In one embodiment of the invention, an adaptor is provided that receives a digital video image signal from a medical device and converts the digital signal into an analog signal that can be displayed by an analog console. In another embodiment, the invention provides a method for converting a digital video signal received from a medical imaging device into a standardized analog video format.

A programmable variable impedance output driver circuit uses analog biases to match driver output impedance to load input impedance. A current mirror is used to obtain a measurement of an external resistance value for matching the impedance of a driven load. The mirrored current generates the voltage "NBIAS" when passed through the resistively connected NFET. Similarly, the current is again mirrored and passed through a resistively connected PFET resulting in the voltage "PBIAS". The analog bias voltages, NBIAS and PBIAS are used to vary the impedance of complementary FETs in an impedance matched driver for a high degree of dI / dt control. The driver provides a high degree of flexibility because its turn-on and turn-off characteristics do not depend on a combination of digital control signals connected directly to the driving FETs as in the prior art. Instead, the PBIAS and NBIAS signals provide analog controls which may be applied to single transistors whose impedance changes as PBIAS and NBIAS increase or decrease.

A magnetic field sensor and a method associated with the magnetic field sensor provide gain correction coefficients and / or offset correction coefficients stored in the magnetic field sensor in digital form. The gain correction coefficients and / or offset correction coefficients can be used to generate analog control signals to control a sensitivity and / or an offset of an analog signal path through the magnetic field sensor.

An automatic frequency correction phase-locked loop (PLL) circuit includes an analog control circuit and a digital control circuit. The digital control circuit includes a High-side comparator and a Low-side comparator which receive an analog control voltage, a state monitor circuit, and a counter and decoder circuit. At least one of the High-side comparator and the Low-side comparator includes a threshold switching circuit which selectively gives a first threshold and a second threshold having different. When the analog control voltage remains between the High-side threshold and the Low-side threshold in a state in which the threshold switching circuit gives the first threshold, the threshold switching circuit switches the first threshold to the second threshold and expands the interval between the High-side threshold and the Low-side threshold.

A control circuit for a lighting system allows analog control over a first range of illumination intensities in which the intensity of the illumination source varies in proportion to the voltage level of the control signal. The circuit provides for improved dimming and color mixing capability by allowing pulse width or frequency modulation control in addition to analog control over a second range of illumination intensities.

A camera head is provided that is adapted to interface with an existing host camera supported on an existing inspection vehicle of an analog-based pipeline inspection system. The camera head allows for capture, processing and storage of digital image data in a memory at the camera head. The camera head includes a digital-to-analog signal converter, and a control module causing selected images to be converted from digital format to analog format, and to be transmitted for navigation purposes via a conventional analog control cable to conventional analog video monitoring equipment in a conventional operator station. Digital Image and other data may be retrieved directly from the digital data memory of the camera head. This approach provides numerous advantages with respect to capture and review of images in digital format, while also permitting control of the vehicle for navigation purposes using an operator's existing analog-based monitoring and control equipment.

Sub-pixel current in an OLED display is forced to converge to a desired level regardless of the source of pixel current error. By using a feedback loop, the pixel transistor current is forced to be equal to a predetermined target current that is established by an analog control circuit. The predetermined target current is selected to generate the desired pixel transistor current through the sub-pixel, and can be set by setting a target voltage. The sub-pixels have a 3T cell structure including 3 TFTs, one TFT for connecting the data line to the storage capacitor, another TFT for driving the sub-pixel current, and still another TFT for connecting the OLED diode anode to the data line of the AMOLED panel. Thus, the feedback loop of the present invention (comprising Taps M and N of a resistor string, and an amplifier, a comparator, and digital logic) senses the pixel transistor current via the data lines of the AMOLED panel to compensate for Mura

Power control circuitry that is configurable as either a Low Dropout (LDO) voltage regulator or a switching DC—DC converter for controlling a variable supply voltage provided to a power amplifier of a mobile terminal is provided. The power control circuitry includes an output stage including first and second output transistors, an analog control system, and a digital control system. When in LDO voltage regulator mode, the analog control system provides an analog control signal to the first transistor based on an adjustable power control signal and a feedback signal indicative of the variable supply voltage, and the digital control system operates to disable the second output transistor. When in DC—DC converter mode, an output stage of the analog control system is disabled, and the digital control system provides binary control signals to the first and second transistors based on the adjustable power control signal and the feedback signal.

A communication circuit, Ethernet controller card, and method comprises K digital-to-analog converters each receiving a corresponding digital control signal and each providing a corresponding analog control signal, wherein K is at least two; K voltage-to-current converters each providing a corresponding bi-level transmit signal component in accordance with a respective one of the corresponding analog control signals; and wherein the corresponding bi-level transmit signal components of each of the K voltage-to-current converters are combined to produce a J-level transmit signal, wherein J=K+1.

A computer system and method of managing a logical partition on a logically-partitioned multi-user computer utilize a handheld computer with a plug-in console emulation module to emulate a console through which various system administrations operations may be performed. The handheld computer is coupled to an adapter on a logically-partitioned computer via a plug-in module coupled to the handheld computer and connected to the adapter via a cable. The handheld computer is configured to emulate a console for a logical partition in the partitioned computer using program code resident in the plug-in module. The plug-in module may incorporate a network interface configured to receive a network connector, a memory, and program code resident in the memory and configured to control the handheld computer to perform the desired console emulation. As such, by incorporating both the console emulation program code and the network interface in the same module, a relatively compact, portable, cost-effective and easy-to-use mechanism for performing system administration operations on a multi-user computer may be provided.

Methods and systems for a hybrid optical device for high dynamic range high resolution remote sensing of object distance, object motion displacement, object three dimensional structure, object spatial profile, and measurement of liquid levels, and different matter interface positions. The device uses a hybrid digital-analog controlled variable focal length lens system to target both specular and diffuse objects. The spatial processing methods and systems can include time-frequency processing optical distance measurement methods to enable a robust hybrid-technique sensor.

The disclosed aerodynamic muscle motion simulation control platform comprises: three very same pieces of aerodynamic muscles connected to a central post and a fixed platform, a motion platform hinged to the muscles with uniform-distributed hinge points, and the central post to rigid connect with the fixed platform and hinge the motion platform through a central ball hinge with the hinge point on platform center to endow the motion platform two rotation DOF. Besides, the control system comprises an input conversion module, a controller, and an output drive amplification module. This invention is fit to different motion simulation.

A frequency synthesizer, a calibrator thereof, and an operating controller thereof are described. The synthesizer comprises a main charge pump that drives a voltage controlled oscillator (VCO) through a loop filter. The calibrator includes a second, replica charge pump that can also drive the VCO, but is set up to output only its maximum or minimum analog output control voltage. Since the construction and characteristics of the replica charge pump duplicate the main charge pump, the main charge pump's minimum and maximum analog control outputs can be cloned out to the VCO on demand. A VCO calibration procedure therefore includes switching the VCO to each of its ranges set by a bank of fixed capacitors, and using the replica charge pump to drive the VCO to its minimum and maximum frequency for each range setting. The min-max frequency data is stored in a lookup table, and operational requests to switch to a new channel frequency can be supported with a priori information about which fixed-capacitor range selection will be best. The operating point controller includes a sensor to sense the operating point and a controller that provides a switching input to a switchable bank of capacitors to change the operating point. The change can be determined according to calibration data.

A general method is provided for electronically reconfiguring the internal structure of a solid to allow precision control of the propagation of wave energy. The method allows digital or analog control of wave energy, such as but not limited to visible light, while maintaining low losses, a multi-octave bandwidth, polarization independence, large area and a large dynamic range in power handling. Embodiments of the technique are provided for large-angle beam steering, lenses and other devices to control wave energy.

The invention discloses a testing device and a testing method of an electric steering engine. The testing method is characterized in that a digital control instruction is sent and a digital feedback signal is received by an industrial control computer; communication protocol conversion is carried out upon the digital control instruction and the feedback signal by a test transfer box; when the electric steering engine to be tested is of analogue type, digital-to-analogue conversion is carried out upon the digital control instruction signal after communication protocol conversion to generate an analogue control instruction; analogue-to-digital conversion is carried out upon a feedback signal after communication protocol conversion to generate a digital feedback signal; the electric steering engine to be tested is controlled by an electric steering engine controller to drive a simulated load table to work according to the digital control instruction or the analogue control instruction, and a signal generated during work is sent to the test transfer box to be used as a feedback signal. According to the testing device and the testing method disclosed by the invention, the entire test device is commonly used in test of analogue and digital electric steering engines through functions of analogue-to-digital conversion and digital-to-analogue conversion of the test transfer box, so that the test process is simplified.

The invention provides real-time automatically leveled table and chair. The panel of the table and chair is supported by a central supporting column and two hydraulic cylinders, and the three supporting points are distributed in an isosceles right triangle shape; a two-dimensional tilt sensor is arranged in the center of the panel to provide two-dimensional tilt angles of a workbench plane relative to the horizontal plane in real time, including x-axial signals with symbols and y-axial signals; and PLC acquires a tilt error according to the signals from the two-dimensional tilt sensor and sends proportional analog control signals in real time, controls positive rotation, negative rotation and rotating speed of a servo motor after the PLC is adjusted by a motor driver, and drives two hydraulic cylinders for leveling to make telescopic actions respectively by driving a composite bidirectional gear pump so as to maintain the horizontal state of the panel of the table and chair. If a substrate is constantly in a moving state, the device acquires tilt signals in real time and constantly repeats the leveling process to play a role in real-time leveling. The table and chair is particularly suitable for application in sea wave shaking environment.

A process is proposed for recovering disturbed digital signals, wherein the electrical signals pass through a feedback equalizer and an analogue control of the setting parameters of the equalizers is performed. A pseudo-error monitor, which facilitates a high-speed adjustment of decision element thresholds, is also provided.

The invention discloses a self-tracking servo control system for a flat plate with high integration and high precision. The self-tracking servo control system comprises a monitoring computer, a servo controller, a PWM driver, a direct current motor, a speed measurer, a transmission mechanism, a rotary transformer, a flat plate antenna and a support rotating mechanism, wherein the monitoring computer receives working conditions and issues control commands; the servo controller receives the control commands issued by the monitoring computer, reads antenna angle position information and receiver angle error information, closes a position loop, tracks the closed loop, and outputs analog controlled quantity to the PWM driver; the PWM driver closes a speed lop and a current loop to drive the direct current motor to further drive the flat plate antenna by the transmission mechanism to rotate; the flat plate antenna receives high frequency telemetry signals; the transmission mechanism, the flat plate antenna and the support rotating mechanism jointly constitute an antenna pedestal; the servo controller, the PWM driver, the direct current motor, the speed measurer, and the rotary transformer are installed on the antenna pedestal; the self-tracking servo control system has the advantages of small volume, light weight, low energy consumption and high integration level.

At a first step, in a synchronous clock generation circuit, the number of delay stages serving as a digital PLL circuit is increased / decreased, and an oscillation circuit performs an oscillation operation when an optimal number of delay stages is set. Thereafter, in an operation at a second step, a control voltage is controlled with the optimal number of delay stages being set for serving as an analog PLL circuit, thereby attaining a lock-in state. As the lock-in state is finally maintained under analog control, an excellent jitter characteristic can be obtained. Thus, ensuring a lock-in range that has been a problem in the analog PLL circuit is solved by varying the number of delay stages in the operation at the first step, and a high jitter characteristic that has been a problem in a digital PLL circuit can be solved by analog control in the operation at the second step.

In a pipeline type A / D converter apparatus including A / D converter circuit parts connected in cascade with each other and A / D converting a sample hold signal in a pipeline form, each A / D converter circuit part includes a pre-A / D converter circuit for A / D converting an input signal into a digital signal, and a multiplying D / A converter circuit for D / A converting the digital signal into an analog control signal, and D / A converting the input signal by sampling, holding and amplifying the input signal using a sampling capacitor based on the analog control signal. A precharge circuit precharges a sampling capacitor before sampling so as to attain a predetermined output value in accordance with a digital input to output characteristic substantially adapted to an input to output characteristic of each A / D converter circuit part that presents an output signal corresponding to the input signal to each A / D converter circuit part.

An intelligent control system for platform screen doors is provided, which belongs to the field of automatic control technology and comprises a CMOS camera, a signal processor, a controller, and a driver. The CMOS camera collects and outputs images to the signal processor. The signal processor is used for the A / D conversion, enchantment processing and information recognition of the images, and converts the recognition results to a control command and outputs the command to the controller. The controller converts the digital control command and emergency control command to an analog control signal and outputs the analog control signal to the driver. The driver drives a mechanical servomechanism after amplification of the analog control signal, thereby controlling the opening / closing operation of the screen door. The inventive system has simple structure and high operational reliability, and can ensure the comfortable travel for passengers and safe and on-time operation of the train.