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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 |
| 6657571 |
Data acquisition system using delta-sigma analog-to-digital signal converters |
Dec. 2, 2003 |
| 6657572 |
Digital noise-shaping filter with real coefficients and method for making the same |
Dec. 2, 2003 |
| 6653958 |
Method for compensating non-linearity of a sigma-delta analog-to-digital converter |
Nov. 25, 2003 |
| 6653960 |
Stabilized power supply using delta sigma modulator |
Nov. 25, 2003 |
| 6653967 |
Fully differential sampling circuit |
Nov. 25, 2003 |
| 6650264 |
Quadrature sampling architecture and method for analog-to-digital converters |
Nov. 18, 2003 |
| 6646581 |
Digital-to-analog converter circuit incorporating hybrid sigma-delta modulator circuit |
Nov. 11, 2003 |
| 6646582 |
Error compensation for sigma-delta modulated digital signals or the like |
Nov. 11, 2003 |
| 6646583 |
High speed digital to analog converter using multiple staggered successive approximation cells |
Nov. 11, 2003 |
| 6642873 |
Multi-level D/A converter incorporated with multi-level quantizer in multi-bit sigma-delta A/D converter |
Nov. 4, 2003 |
| 6642874 |
Sigma-delta data conversion employing quantization error feedback |
Nov. 4, 2003 |
| 6642875 |
PWM converting circuit, D/A converter and PWM converting method with improved resolution |
Nov. 4, 2003 |
| 6639526 |
Circuits and methods for a variable oversample ratio delta-sigma analog-to-digital converter |
Oct. 28, 2003 |
| 6639528 |
Apparatus for multi-channel signal processing and communication terminal using the same |
Oct. 28, 2003 |
| 6639530 |
Modulation of an analog signal into a digital representation thereof |
Oct. 28, 2003 |
| 6639531 |
Cascaded noise shaping circuits with low out-of-band noise and methods and systems using the same |
Oct. 28, 2003 |
| 6639532 |
Nested chopper delta-sigma modulator |
Oct. 28, 2003 |
| 6639537 |
Highly linear analog-to-digital conversion system and method thereof |
Oct. 28, 2003 |
| 6639946 |
Sigma delta modulator with SAW filter |
Oct. 28, 2003 |
| 6636122 |
Analog frequency locked loop with digital oversampling feedback control and filter |
Oct. 21, 2003 |
| 6636170 |
Signal converter with digital/analog conversion and noise-dependent variability of output signal bandwidth |
Oct. 21, 2003 |
| 6636575 |
Cascading PLL units for achieving rapid synchronization between digital communications systems |
Oct. 21, 2003 |
| 6630898 |
Low voltage, unit delay quantizer with feedforward auto-zero mechanism |
Oct. 7, 2003 |
| 6628217 |
Signal scaling scheme for a delta sigma modulator |
Sep. 30, 2003 |
| 6628218 |
Method and apparatus for mismatched shaping of an oversampled converter |
Sep. 30, 2003 |
| 6624772 |
Offset calibration system |
Sep. 23, 2003 |
| 6624774 |
Delta sigma D/A converter |
Sep. 23, 2003 |
| 6621434 |
Method for converting a plurality of signals from one of a digital and analogue form to the other form |
Sep. 16, 2003 |
| 6621435 |
Method and circuit for improving the signal/noise ratio of a sigma-delta modulator |
Sep. 16, 2003 |
| 6621436 |
Delta sigma type AD converter having band pass filter transmission functionality |
Sep. 16, 2003 |
| 6617988 |
Apparatus for analogue information transfer |
Sep. 9, 2003 |
| 6617991 |
Structure for adjusting gain in a flash analog to digital converter |
Sep. 9, 2003 |
| 6614373 |
Method and system for sampling a signal using analog-to-digital converters |
Sep. 2, 2003 |
| 6614374 |
High performance switched-capacitor filter for oversampling Sigma-Delta digital to analog converters |
Sep. 2, 2003 |
| 6614375 |
Sigma-delta analog-to-digital converter having improved reference multiplexer |
Sep. 2, 2003 |
| 6611220 |
Architecture for decimation algorithm |
Aug. 26, 2003 |
| 6611221 |
Multi-bit sigma-delta modulator employing dynamic element matching using adaptively randomized data-weighted averaging |
Aug. 26, 2003 |
| 6608572 |
Analog to digital converters with integral sample rate conversion and systems and methods using the same |
Aug. 19, 2003 |
| 6608575 |
Hybrid multi-stage circuit |
Aug. 19, 2003 |
| 6608576 |
Pulse code modulation encoder for data acquisition |
Aug. 19, 2003 |
| 6606043 |
Method and arrangement for synchronizing a sigma delta-modulator |
Aug. 12, 2003 |
| 6606044 |
Method and apparatus for generating a pulse width modulated signal |
Aug. 12, 2003 |
| 6604009 |
Signal processors |
Aug. 5, 2003 |
| 6600378 |
Fractional-N frequency synthesizer with sine wave generator |
Jul. 29, 2003 |
| 6600789 |
Signal processing method and device |
Jul. 29, 2003 |
| 6597371 |
System for digitally driving addressable pixel matrix |
Jul. 22, 2003 |
| 6593865 |
Rapid multiplexing analog to digital converter |
Jul. 15, 2003 |
| 6593866 |
Signal processors |
Jul. 15, 2003 |
| 6593870 |
MEMS-based electrically isolated analog-to-digital converter |
Jul. 15, 2003 |
| 6590512 |
Developing a desired output sampling rate for oversampled converters |
Jul. 8, 2003 |
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