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Class 341/129 - Plural slope analog to digital converter


Subclass of Class 341 - Coded data generation or conversion
Definition: Subject matter where the input analog signal is integrated
No. of patents: 26
Last issue date: 08/19/2008


NumberTitleIssue Date
7414553Microcontroller having in-situ autocalibrated integrating analog-to-digital converter (IADC)
A microcontroller has an integrating analog-to-digital converter (IADC) with an in-situ autocalibrating functionality. On-chip autocalibrating circuitry supplies a first predetermined analog input voltage to the IADC and obtains a first data value from the IADC. The...
08/19/2008
7379011Lossless nonlinear analog gain controller in image sensor and manufacturing method thereof
An image sensor comprises an active pixel sensor (APS) array, a first analog-to-digital converter (ADC), and a ramp signal generator. The APS array has includes a plurality of pixels of arranged in a second order two-dimensional matrix, and wherein the APS array gen...
05/27/2008
7324037Analog 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
7064694Multi-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
7038610Integration 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
6850178Analog-to-digital conversion method and device
An analog-to-digital conversion device is provided that uses pulse delay circuits to convert an input voltage into numerical data and offers a high resolution in analog-to-digital conversion or a high analog-to-digital conversion rate. The analog-to-digital conversi...
02/01/2005
6661359Device and method for generating synchronous numeric signals
A device for generating synchronous numeric signals, including a reference generating device supplying a reference signal and a first timing signal, both having a reference frequency; and a timed generating device supplying a synchronized signal having th...
12/09/2003
6636575Cascading PLL units for achieving rapid synchronization between digital communications systems
A clock synchronization system for synchronizing a first communications device and a second communications device to enable digital communication there between. A first device generates a first clock signal Fa. A second device generates a second clock sig...
10/21/2003
6535156Method and apparatus for a folding analog-to-digital converter (ADC) having a coarse decoder with reduced complexity
A method that correlates a course analog to digital converter (ADC) output value against a folded fine ADC transfer curve slope value to determine an ADC circuit region. The folded fine ADC has a greater resolution than the course ADC. A decoder that corr...
03/18/2003
6492929Analogue to digital converter and method of analogue to digital conversion with non-uniform sampling
An analogue to digital converter generating at least two threshold levels and a comparator for comparing each of the levels with the input signal and generating a primary digital output signal to provide an indication that the input signal has crossed one...
12/10/2002
6448918Digital/analog converter
It is object to provide a digital-to-analog converter capable of generating an output waveform having less distortion without increasing the operating speed of components. A D/A converter comprises a multiplying section 1, four data holding sections 2-1 t...
09/10/2002
6285310Integrating 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
5781142Method and apparatus for converting an analog measurement signal to a digital signal having reduced conversion error
In a measurement device, a detector output signal indicative of a condition magnitude, e.g., radiation, pressure, temperature, etc, and a ramp signal are added, and the resulting analog summation signal is converted to a digital signal. The digital signal...
07/14/1998
5565869Multiple slope analog-to-digital converter having increased linearity
A multiple slope integrating analog-to-digital converter (ADC) includes an integrator and a comparator in which an input voltage to be measured is applied to a summing node at the input of the integrator during an integrate cycle, while at the same time p...
10/15/1996
5022052Analog signal binary transmission system using slope detection
A system for transmitting an analog signal comprises converting the input analog signal to a binary signal by detecting the change in sign of the slope of the analog signal and generating a binary signal whose transition occurs at each change of sign of s...
06/04/1991
5019817Analogue-to-digital converter
A multiple ramp analogue-to-digital converter comprises an integrator connected to receive and integrate an analogue input signal to be converted, and an opposing coarse reference signal. Instead of these signals being applied to the integrator sequential...
05/28/1991
4942401Analog to digital conversion with charge balanced voltage to frequency converter having polarity responsive offset
A bipolar analog voltage is converted into a digital signal by sensing the polarity of the voltage and selectively supplying a bias voltage to an analog-to-digital converter, which can preferably be a charge balanced voltage to frequency converter, as a f...
07/17/1990
4906996Analog-to-digital converter with offset voltage polarity inversion
There is provided according to the invention a method and apparatus for eliminating or minimizing the error due to amplifier offset or drift error in an integrating dual slope analog-to-digital converter. The converter is provided with a switching and con...
03/06/1990
4573037Analog-to digital converter and method
A system and method is provided for producing digital signals proportional to selected parameters of an input signal supplied to a modulator. The modulated output of the modulator is supplied to a delaying bistable circuit, and both the original output an...
02/25/1986
4357600Multislope converter and conversion technique
A multislope A/D converter is presented which employs a multislope integration technique enabling the use of a single comparator to detect polarity changes in the integrator output voltage. The A/D converter integrates a test signal during a run-up interv...
11/02/1982
4309692Integrating analog-to-digital converter
An integrating analog-to-digital converter for producing a digital output signal representing the value of an analog input signal which may have either a positive or negative polarity. The converter uses a switching circuit to reverse an integrator capaci...
01/05/1982
4195283Method for converting an analog voltage to a digital value free from conversion errors, and an integrating type analog-to-digital converter capable of eliminating conversion errors
An integrating type analog-to-digital converter is provided which finds in the first conversion cycle an analog-to-digital conversion value including a possible conversion error resulting from offset voltage applies an unknown voltage to an inverting ampl...
03/25/1980
4081800Analog-to-digital converter
Disclosed is an analog-to-digital converter comprising an analog switch for selecting one of analog input voltage, and first and second different reference potentials; an integrator including at least one integration resistor to which is applied the outpu...
03/28/1978
4063236Analog-digital converter
An analog-digital converter which comprises first and second signal input terminals selectively supplied with any of an input analog voltage and first and second reference voltages having the same polarity as said input analog voltage but different levels...
12/13/1977
3943506Multiple ramp digitisers
This invention relates to electronic analogue to digital converters of the integrating type wherein a capacitor is successively charged by an input signal and discharged by a reference signal, the time required for discharge serving as a measure of the am...
03/09/1976
3942174Bipolar multiple ramp digitisers
Electronic analogue to digital converters of the integrating type wherein a capacitor is successively charged by an input signal and discharged by a reference signal, the time required for discharge serving as a measure of the amplitude of the input signa...
03/02/1976
 
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