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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 |
| 6844838 |
Digital to analog converter having a low power semi-analog finite impulse response circuit |
Jan. 18, 2005 |
| 6842128 |
Higher order sigma-delta analog-to-digital converter based on finite impulse response filter |
Jan. 11, 2005 |
| 6842129 |
Delta-sigma analog-to-digital converter |
Jan. 11, 2005 |
| 6842130 |
Hardware-efficient implementation of dynamic element matching in sigma-delta DAC's |
Jan. 11, 2005 |
| 6842131 |
Delta-sigma modulator |
Jan. 11, 2005 |
| 6842133 |
Strobe through differential signaling |
Jan. 11, 2005 |
| 6842134 |
Highly accurate digital to analog converter |
Jan. 11, 2005 |
| 6842486 |
Signal processing system with baseband noise modulation and noise fold back reduction |
Jan. 11, 2005 |
| 6839010 |
Sigma-delta analog-to-digital converter with reduced quantization noise |
Jan. 4, 2005 |
| 6839011 |
System and method of filtering in an integration system |
Jan. 4, 2005 |
| 6839012 |
Variable-order delta sigma modulator and DA converter |
Jan. 4, 2005 |
| 6839016 |
Pipeline ad converter |
Jan. 4, 2005 |
| 6839387 |
Self-dithering sigma-delta converter and communication device incorporating same |
Jan. 4, 2005 |
| 6836228 |
Analog-to-digital converter with switched integrator |
Dec. 28, 2004 |
| 6836229 |
Automatic gain control method |
Dec. 28, 2004 |
| 6836231 |
Signal generator |
Dec. 28, 2004 |
| 6831577 |
Sigma delta modulator having enlarged dynamic range due to stabilized signal swing |
Dec. 14, 2004 |
| 6831578 |
Method and circuit arrangement for demodulation of a quadrature amplitude- or phase-modulated signal |
Dec. 14, 2004 |
| 6831579 |
BiCMOS latches with NPN control devices for current limiting of NPN regeneration devices |
Dec. 14, 2004 |
| 6822592 |
Method for self-calibrating a frequency of a modulator circuit, and circuit using said method |
Nov. 23, 2004 |
| 6822593 |
Digital to digital Sigma-Delta modulator and digital frequency synthesizer incorporating the same |
Nov. 23, 2004 |
| 6822594 |
Overload protection and stability for high order 1-bit delta-sigma modulators |
Nov. 23, 2004 |
| 6822595 |
Extended range digital-to-analog conversion |
Nov. 23, 2004 |
| 6823019 |
Reduced DC transients in a sigma delta filter |
Nov. 23, 2004 |
| 6819275 |
Audio signal compression |
Nov. 16, 2004 |
| 6819276 |
Noise-shaper system and method |
Nov. 16, 2004 |
| 6819281 |
A/D conversion circuit and solid imaging device |
Nov. 16, 2004 |
| 6816097 |
System and method for performing digital-to-analog conversion using a sigma-delta modulator |
Nov. 9, 2004 |
| 6816098 |
High-speed oversampling modulator device |
Nov. 9, 2004 |
| 6816100 |
Analog-to-digital converters with common-mode rejection dynamic element matching, including as used in delta-sigma modulators |
Nov. 9, 2004 |
| 6816104 |
Analog-to-digital converter utilizing a timer for increased resolution |
Nov. 9, 2004 |
| 6812875 |
Analog/digital converter and method for controlling the same |
Nov. 2, 2004 |
| 6812876 |
System and method for spectral shaping of dither signals |
Nov. 2, 2004 |
| 6809669 |
Selective noise generator |
Oct. 26, 2004 |
| 6809672 |
Low power, high SNR, high order delta sigma modulator stage having integrators with pipelined cross coupled input circuits |
Oct. 26, 2004 |
| 6806820 |
Analog reconstruction of a digital signal |
Oct. 19, 2004 |
| 6803869 |
Circuits, Systems, and methods for volume in low noise 1-bit digital audio systems |
Oct. 12, 2004 |
| 6801148 |
Beamformed ultrasonic imager with delta-sigma feedback control |
Oct. 5, 2004 |
| 6795001 |
Analog FIR-filter with .SIGMA. .DELTA. modulator and delay line |
Sep. 21, 2004 |
| 6795002 |
Gain scaling for higher signal-to-noise ratios in multistage, multi-bit delta sigma modulators |
Sep. 21, 2004 |
| 6795003 |
Hardware-efficient implementation of dynamic element matching in sigma-delta DAC's |
Sep. 21, 2004 |
| 6795004 |
Delta-sigma modulation apparatus and signal amplification apparatus |
Sep. 21, 2004 |
| 6795005 |
Variable, adaptive quantization in sigma-delta modulators |
Sep. 21, 2004 |
| 6795006 |
Integrator reset mechanism |
Sep. 21, 2004 |
| 6795007 |
Circuits and methods for a variable over sample ratio delta-sigma analog-to-digital converter |
Sep. 21, 2004 |
| 6788232 |
Sigma delta modulator |
Sep. 7, 2004 |
| 6788233 |
Digital decimation filter |
Sep. 7, 2004 |
| 6788235 |
A/D converter having signaling and requesting capability |
Sep. 7, 2004 |
| 6788236 |
Method and system for implementing a sigma delta analog-to-digital converter |
Sep. 7, 2004 |
| 6784816 |
Circuits, systems and methods for volume control in 1-bit digital audio systems |
Aug. 31, 2004 |
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