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Class Information
Number: 341/167
Name: Coded data generation or conversion > Analog to or from digital conversion > Analog to digital conversion > Intermediate conversion to time interval > Dual slope
Description: Subject matter wherein the input analog signal is integrated for a fixed time interval following which there is a linear return of the integrated signal to the datum level by means of an applied reference signal; the order of application of the two signals may be reversed.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8188903 Ramp wave output circuit, analog/digital conversion circuit, and camera May. 29, 2012
8144047 Current-mode dual-slope temperature-digital conversion device Mar. 27, 2012
8041131 Variable length coding of coefficient clusters for image and video compression Oct. 18, 2011
8036471 Joint amplitude and position coding of coefficients for video compression Oct. 11, 2011
7990305 Current mode double-integration conversion apparatus Aug. 2, 2011
7916061 Apparatus and method for sigma-delta analog to digital conversion Mar. 29, 2011
7830294 Measurement amplification device and method Nov. 9, 2010
7804438 Image sensors and dual ramp analog-to-digital converters and methods Sep. 28, 2010
7702488 Measuring device for capacitive pressure measure Apr. 20, 2010
7671777 AD converter Mar. 2, 2010
7616147 Analog-to-digital converter Nov. 10, 2009
7436343 Solid state image pickup apparatus, camera and driving method of solid state image pickup apparatus Oct. 14, 2008
7382304 Sampling and measurement of periodic signals Jun. 3, 2008
7336213 Polarity independent precision measurement of an input voltage signal Feb. 26, 2008
7071862 Transmission line analog to digital converter Jul. 4, 2006
7038610 Integration type A/D converter, and battery charger utilizing such converter May. 2, 2006
6906648 Circuit and method of multi-channel dual slope ADC with offset cancellation and hysteresis input Jun. 14, 2005
6784823 Rail to rail dual slope ADC Aug. 31, 2004
6762706 Reduced power analog-to-digital converter and method thereof Jul. 13, 2004
6670904 Double-ramp ADC for CMOS sensors Dec. 30, 2003
6646586 Dual-slope analog-to-digital converter and comparison circuit Nov. 11, 2003
6473018 Delta sigma analog-to-digital converter Oct. 29, 2002
6411247 Analog/digital converter Jun. 25, 2002
6384760 Analog-to-digital converter May. 7, 2002
6285310 Integrating analog/digital converter Sep. 4, 2001
6278394 Signal processing circuit and method of operation Aug. 21, 2001
6226562 Method and system for adjusting and calibrating circuit parameters May. 1, 2001
5784016 Self-calibration technique for pipe line A/D converters Jul. 21, 1998
5764541 Microprocessor controlled sensor signal conditioning circuit Jun. 9, 1998
5614902 Ratiometric analog to digital converter with automatic offset Mar. 25, 1997
5612698 Current-input, autoscaling, dual-slope analog-to-digital converter Mar. 18, 1997
5592168 High speed dual-slope analog-to-digital converter Jan. 7, 1997
5579194 Motor starter with dual-slope integrator Nov. 26, 1996
5519352 Integrator system with variable gain feedback May. 21, 1996
RE34428 Analog-to-digital converter with offset voltage polarity inversion Nov. 2, 1993
5229771 Analog to digital converter for converting multiple analog input signals to corresponding digital output signals during one conversion cycle Jul. 20, 1993
5229772 Ratiometric ADC with pulse width modulated output for wide temperature range applications Jul. 20, 1993
5194868 Dual slope integrating A/C converter Mar. 16, 1993
5184128 Integrating A/D converter with means for reducing rollover error Feb. 2, 1993
5144307 Method of controlling double integral A-D converter Sep. 1, 1992
5128676 Variable conversion rate analog-to-digital converter Jul. 7, 1992
5121120 Programmable digital measuring and control instrument for a vacuum gauge Jun. 9, 1992
5101206 Integrating analog to digital converter Mar. 31, 1992
5097264 Analog-to-digital converter Mar. 17, 1992
5014058 Method and arrangement for evaluating a measurable analog electrical quantity May. 7, 1991
5006853 Hysteresis insensitive analog to digital converter system using a coarse comparator and a fine comparator Apr. 9, 1991
4999632 Analog to digital conversion with noise reduction Mar. 12, 1991
4939520 Analog to digital converter using an integrator having a partially controlled output signal Jul. 3, 1990
4939519 Apparatus for method and a high precision analog-to-digital converter Jul. 3, 1990
4910516 Integrated dual-slope analog to digital converter with R/C variance compensation Mar. 20, 1990

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