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| Number | Title | Issue Date |
| 8144047 | Current-mode dual-slope temperature-digital conversion device A current mode dual-slope temperature-to-digital conversion device is disclosed. The conversion device comprises a temperature dependent current source and a reference current source. Firstly, a capacitor is charged by the temperature dependent current source. Next,... | 03/27/2012 |
| 7990305 | Current mode double-integration conversion apparatus A double-integration signal processing apparatus for pulse width amplification and A/D conversion is provided. The current mode double-integration conversion apparatus includes: a current mode double-integration unit which integrates an input current in a predetermi... | 08/02/2011 |
| 7830294 | Measurement amplification device and method Measurement amplification methods and devices for detecting the detuning of a measurement bridge (10) to which a bipolar, rectangular supply voltage (Us) is supplied. The methods and devices use integrating A/D conversion and are characterized in t... | 11/09/2010 |
| 7804438 | Image sensors and dual ramp analog-to-digital converters and methods Dual ramp analog-to-digital converters and methods allow for performing analog-to-digital conversion of an analog signal. Various dual ramp analog-to-digital converters and methods allow for applying the analog signal and a coarse ramp to a same input of a comparato... | 09/28/2010 |
| 7436343 | Solid state image pickup apparatus, camera and driving method of solid state image pickup apparatus A solid state image pickup apparatus capable of reading a signal at a high speed while securing a wide dynamic range is provided. A signal based on a part of charges having overflown a photoelectric conversion unit (201) to a floating diffusion region (205... | 10/14/2008 |
| 7382304 | Sampling and measurement of periodic signals A periodic signal is sampled. The sampling frequency is less than the Nyquist rate of the periodic signal. A period of the periodic signal is determined. A phase of the periodic signal is tracked to determine a sample's position on the period of the periodic signal.... | 06/03/2008 |
| 7339418 | Differential filter topology with dielectric absorption cancellation for a data acquisition device In one embodiment, a differential filter is configured using a differential operational amplifier (op-amp) with two feedback RC networks, each RC network coupled between a respective input and a respective output of the op-amp. Two capacitive elements may each provi... | 03/04/2008 |
| 7336213 | Polarity independent precision measurement of an input voltage signal Polarity independent precision measurement of an input voltage signal is accomplished using a voltage integrating circuit that receives a first positive reference voltage and the input voltage signal, wherein the first positive reference voltage is greater in magnit... | 02/26/2008 |
| 7324037 | Analog to digital converter with interference rejection capability An analog to digital converter (ADC) with interference rejection capability and method thereof are disclosed. The ADC includes a threshold generator, a comparator circuit, a counter and an integrator. By comparing a signal with positive and negative threshold signal... | 01/29/2008 |
| 7287318 | Biosensor A biosensor is provided that comprises a plate element with a pre-determined reaction zone and a recess positioned adjacent to the reaction zone. The biosensor also comprises a reagent that is positioned on the reaction zone. In preferred embodiments, the recess cir... | 10/30/2007 |
| 7265329 | Image sensors with distributed amplifiers and related methods The image sensor makes use of a distributed amplifier having its non-inverting input provided by a pixel amplifier transistor, and its inverting input and output provided in the pixel's column circuitry. The distributed amplifier is directly integrated with the imag... | 09/04/2007 |
| 7148831 | Variable quantization ADC for image sensors An A/D converter suitable for use in a system in which the signal power of noise increases with the signal power of the signal, such as an imaging system, utilizes a variable quantization system for converting analog signals into digital signals. The variable quanti... | 12/12/2006 |
| 7102405 | Pulse-width modulation circuit and switching amplifier using the same A pulse-width modulation circuit converts an input signal into a pulse signal to be supplied to a switch amplifying circuit. The modulation circuit includes a comparison signal generator, an amplitude controller for modulating a comparison signal from the signal gen... | 09/05/2006 |
| 7095355 | Low power ADC for imaging arrays An analog to digital converter ADC is adapted for low power for use in an imaging array. The ADC is a digital inverter with feedback to convert an asynchronous ramp voltage to an output count at each crossing of a voltage threshold. A separate circuit generates a vo... | 08/22/2006 |
| 7088275 | Variable clock rate analog-to-digital converter An algorithmic analog-to-digital converter (ADC) includes a sample-and-hold circuit and an ADC processing unit operating in parallel and sharing a single operational amplifier. The ADC processing unit includes an MDAC with a switched capacitor topology and a sub-ADC... | 08/08/2006 |
| 7075464 | Circuit for current measurement and current monitoring A circuit for current measurement and current monitoring in a motor vehicle is provided, with a measuring circuit with a first subtractor circuit, connected to a measuring resistor; an offset circuit, which is connected to the first subtractor circuit in such a way ... | 07/11/2006 |
| 7071862 | Transmission line analog to digital converter A transmission line analog-to-digital converter uses an unterminated transmission line driven by a current source to generate a stair-step waveform having equal time step periods for measuring the conversion time as a digital output value of an analog input. The con... | 07/04/2006 |
| 7064694 | Multi-cycle, multi-slope analog to digital converter A multi-cycle, multi-slope analog to digital converter overlaps charge and discharge periods to reduce latency to the end of the measurement following a sampling window. Additionally, charging and discharging of an integration capacitor during the measurement cycle ... | 06/20/2006 |
| 7045054 | Small volume biosensor for continuous analyte monitoring Sensors (10, 110, 210, 310, 410) and a method for detecting an analyte are described. Sensors (10, 110, 210, 310, 410) each have a volume of a hydrophilic medium (24) that retains an amount of analyte proportionate to the concentration of analyt... | 05/16/2006 |
| 7038610 | Integration type A/D converter, and battery charger utilizing such converter An integration type A/D converter has two sets of integration type A/D converter sections which can be periodically switched over at a predetermined period, with one converter section integrating an input signal to give an integral output voltage and another convert... | 05/02/2006 |
| 7029171 | Integrated digital temperature sensor A digital integrated circuit temperature sensor including an analog-to-digital converter providing a binary word representative of a temperature internal to the integrated circuit, and a circuit for providing an analog voltage representative of the circuit temperatu... | 04/18/2006 |
| 7012557 | Ramp modulation ADC for imagers An imager with a ramp modulation analog-to-digital converter. The ramp modulation analog-to-digital converter uses a ramp generator capable of generating ramp voltages that change by more than one step to reduce the number of steps in the conversion process. ... | 03/14/2006 |
| 7002821 | Zero drift analog memory cell, array and method of operation A zero-drift analog memory (ZDAM) cell that indefinitely maintains an output signal at a discrete voltage while the memory circuit is powered, wherein the memory circuit receives an input signal, passes the input signal to a storage element upon receiving an asserti... | 02/21/2006 |
| 6998850 | Systems and methods for measuring picoampere current levels In one embodiment, a circuit measures picoampere current levels. The circuit comprises: an operational-amplifier that has differential inputs and differential outputs; a switching structure that switchably couples an input line to one of the differential inputs in r... | 02/14/2006 |
| 6975103 | Resistance ratio digitizing ohmmeter system A digitizing ohmmeter system for providing a digital resistance ratio measurement includes a high impedance current source providing a DC excitation current to an impedance-varying input sensor and a reference resistor and an ADC circuit including a charge-balancing... | 12/13/2005 |
| 6919835 | Infinite electronic integrator An electronic integrator includes a compensation circuit which maintains an output of the integrator within a desired range. The compensation circuit includes a comparator which continuously compares the integrator output to a reference value, and a correction circu... | 07/19/2005 |
| 6911621 | Biosensor A method of forming a biosensor is provided. The method includes providing a substrate and a cover including first and second surfaces, positioning a reagent on the substrate, carving a channel by laser ablation in the first surface, and coupling the first surface o... | 06/28/2005 |
| 6906648 | Circuit and method of multi-channel dual slope ADC with offset cancellation and hysteresis input A multi-channel dual slope analog-digital converter with offset cancellation an hysteresis input is provided in the present invention, wherein a charge reset period and an auto zero period are eliminated, so as to shorten cycle time. An offset cancel capacitor is al... | 06/14/2005 |
| 6784823 | Rail to rail dual slope ADC A rail to rail dual slope analog to digital converter (ADC) is provided in the present invention. The circuit scheme has an input stage, an integrator stage, and a comparator stage, where an operational amplifier (OPAMP) can be comprised of each stage respectively. ... | 08/31/2004 |
| 6762706 | Reduced power analog-to-digital converter and method thereof A reduced power analog-to-digital (A/D) converter is disclosed herein. Reference current to an op-amp used in an A/D converter is reduced during later conversion cycles in an A/D conversion process. The reference current to the op-amp can be reduced without sacrific... | 07/13/2004 |
| 6670904 | Double-ramp ADC for CMOS sensors A double ramp ADC within an image sensor. The double ramp ADC divides the analog-to-digital conversion process into two steps. During the first step of the conversion, the ADC runs through the potential digital values roughly, using coarse counter steps, ... | 12/30/2003 |
| 6646586 | Dual-slope analog-to-digital converter and comparison circuit A dual-slope analog-to-digital converter and a comparison circuit for the dual-slope analog-to-digital converter. The dual-slope analog-to-digital converter includes a buffer, an integrator coupled to the buffer and the comparison circuit. The comparison ... | 11/11/2003 |
| 6473018 | Delta sigma analog-to-digital converter For the realization of a unipolar analog input range, in addition to the provision of an analog input sampling circuit having an input capacitor, a charge transfer circuit, an integrator having an integrating capacitor, a comparator, and a D-type flip-flo... | 10/29/2002 |
| 6411247 | Analog/digital converter An integration voltage obtained by continuously integrating an input voltage and a reference voltage is compared with a base voltage GND by a voltage comparator. The time that is required until a comparison result is inverted is counted by a counter And a... | 06/25/2002 |
| 6384760 | Analog-to-digital converter A multislope, continuously integrating analog-to-digital converter includes a first switch coupled to a first reference voltage, a second switch coupled to a second reference voltage, a third switch coupled to an input voltage, and an integrator operably ... | 05/07/2002 |
| 6285310 | Integrating analog/digital converter An analog/digital converter including an amplifier (1) wired as an integrator, a comparator (2) electrically downstream from the integrator, a time counter (6) which continually counts the pulses of a pulse generator (5), a bistable element (4), and addit... | 09/04/2001 |
| 6278394 | Signal processing circuit and method of operation An analog-to-digital or digital-to-analog system contains a converter (706). The converter is supplied with a clock signal (CLK1) at a frequency fs derived from a crystal of a frequency fs/N. The frequency fs is derived from the fs/N crystal frequency by ... | 08/21/2001 |
| 6226562 | Method and system for adjusting and calibrating circuit parameters A method and system for calibrating analog integrated circuits. Initially, a single calibration circuit is formed integral with a group of analog integrated circuits. A control signal and a calibration signal are generated from the calibration circuit. Ne... | 05/01/2001 |
| 5784016 | Self-calibration technique for pipe line A/D converters A new self calibration technique for pipe line A/D converters is presented. It consists of calibration by correcting the reference voltage to each stage by means of a tunable MOSFET attenuator. This simplifies the calibration circuit in each stage and shi... | 07/21/1998 |
| 5764541 | Microprocessor controlled sensor signal conditioning circuit A method and apparatus for measurement signal compensation comprises providing an analog-to-digital converter that includes a dual slope integrator. A microprocessor controls the reference voltage applied to the integrator. An amplifier having a switchabl... | 06/09/1998 |
