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Class Information
Number: 341/143
Name: Coded data generation or conversion > Analog to or from digital conversion > Differential encoder and/or decoder (e.g., delta modulation, differential pulse code modulation)
Description: Subject matter wherein the analog signal which is to be encoded or decoded depends on the difference between a given analog signal and the analog signal previously encoded or decoded.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6476752 |
Signal processing system employing two bit ternary signal |
Nov. 5, 2002 |
| 6473009 |
PWM power amplifier |
Oct. 29, 2002 |
| 6473017 |
One-bit second order sigma-delta modulator including a polynomial vector quantizer |
Oct. 29, 2002 |
| 6473018 |
Delta sigma analog-to-digital converter |
Oct. 29, 2002 |
| 6473019 |
Low capacitance, low kickback noise input stage of a multi-level quantizer with dithering and multi-threshold generation for a multi-bit sigma-delta modulator |
Oct. 29, 2002 |
| 6469648 |
Digital-to analog-converting method and digital-to analog converter employing common weight generating elements |
Oct. 22, 2002 |
| 6469649 |
Narrowband analog to digital converter with suppressed second-order distortion |
Oct. 22, 2002 |
| 6469650 |
Method and system for selecting implementation of a filter controller between a single conversion mode that ensures a fully-settled converted output and a continuous conversion mode |
Oct. 22, 2002 |
| 6466143 |
Non-return-to-zero DAC using reference sine wave signals |
Oct. 15, 2002 |
| 6466146 |
Hybrid low-pass sigma-delta modulator |
Oct. 15, 2002 |
| 6466147 |
Method and apparatus for randomized dynamic element matching DAC |
Oct. 15, 2002 |
| 6466277 |
VSB digital modulator |
Oct. 15, 2002 |
| 6462685 |
Dither signal insertion inversely proportional to signal level in delta-sigma modulators |
Oct. 8, 2002 |
| 6462686 |
Servo controller and servo control method |
Oct. 8, 2002 |
| 6462687 |
High performance delta sigma ADC using a feedback NRZ sin DAC |
Oct. 8, 2002 |
| 6462688 |
Direct drive programmable high speed power digital-to-analog converter |
Oct. 8, 2002 |
| 6462689 |
Digital to analog converter (DAC) having an adjustable dynamic range |
Oct. 8, 2002 |
| 6462690 |
Circuit systems and methods for multirate digital-to-analog amplifier systems |
Oct. 8, 2002 |
| 6459397 |
Saturation compensating analog to digital converter |
Oct. 1, 2002 |
| 6456217 |
Digital/analog converter having delta-sigma type pulse modulation circuit |
Sep. 24, 2002 |
| 6456219 |
Analog-to-digital converter including two-wire interface circuit |
Sep. 24, 2002 |
| 6452521 |
Mapping a delta-sigma converter range to a sensor range |
Sep. 17, 2002 |
| 6452522 |
Delta Modulator |
Sep. 17, 2002 |
| 6452524 |
Delta sigma converter incorporating a multiplier |
Sep. 17, 2002 |
| 6452525 |
One-bit second order sigma-delta modulator including a polynomial vector quantizer |
Sep. 17, 2002 |
| 6448912 |
Oversampled centroid A to D converter |
Sep. 10, 2002 |
| 6448915 |
Modulo-M delta sigma circuit |
Sep. 10, 2002 |
| 6448918 |
Digital/analog converter |
Sep. 10, 2002 |
| 6449569 |
Calibration and compensation of delta sigma ADC's and DAC's by correlating noise signals |
Sep. 10, 2002 |
| 6445318 |
Method and apparatus for providing signal dependent dither generator for sigma-delta modulator |
Sep. 3, 2002 |
| 6445320 |
A/D conversion apparatus |
Sep. 3, 2002 |
| 6445321 |
Hybrid low-pass sigma-delta modulator |
Sep. 3, 2002 |
| 6445324 |
Method for dynamic matching of the elements of an integrated multibit digital-to-analog converter with balanced output for audio applications |
Sep. 3, 2002 |
| 6445331 |
Apparatus and method for common-mode regulation in a switched capacitor circuit |
Sep. 3, 2002 |
| 6441759 |
Multi-bit .DELTA..SIGMA. modulator having linear output |
Aug. 27, 2002 |
| 6441760 |
Method and apparatus for digital to analog conversion |
Aug. 27, 2002 |
| 6441761 |
High speed, high resolution digital-to-analog converter with off-line sigma delta conversion and storage |
Aug. 27, 2002 |
| 6437718 |
Continuous time delta-sigma modulator |
Aug. 20, 2002 |
| 6437719 |
Delta-sigma modulator for power amplification of audio signals |
Aug. 20, 2002 |
| 6433643 |
Reduced latency differentiator |
Aug. 13, 2002 |
| 6433726 |
Fractional decimation filter using oversampled data |
Aug. 13, 2002 |
| 6429797 |
Decimation filter for a bandpass delta-sigma ADC |
Aug. 6, 2002 |
| 6430229 |
Capacitive isolation system with digital communication and power transfer |
Aug. 6, 2002 |
| 6426714 |
Multi-level quantizer with current mode DEM switch matrices and separate DEM decision logic for a multibit sigma delta modulator |
Jul. 30, 2002 |
| 6426978 |
Digital communication systems and methods for differential and/or amplitude encoding and decoding secondary symbols |
Jul. 30, 2002 |
| 6424279 |
Sigma-delta analog-to-digital converter using mixed-mode integrator |
Jul. 23, 2002 |
| 6424280 |
Signal clipping circuit for switched capacitor sigma delta analog to digital converters |
Jul. 23, 2002 |
| 6420987 |
Hysteresis in an oversampled data conveter |
Jul. 16, 2002 |
| 6420991 |
Dynamic element matching for converting element mismatch into white noise for a pipelined analog to digital converter |
Jul. 16, 2002 |
| 6417792 |
Single phase bi-directional electrical measurement systems and methods using ADCs |
Jul. 9, 2002 |
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