| Patents for H03M 3 - Conversion of analogue values to or from differential modulation (7,070) |
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| 05/16/1995 | US5416483 Method and circuit for noise shaping |
| 05/16/1995 | US5416481 Analog-to-digital converter with multi-level dither current input |
| 05/09/1995 | US5414424 Fourth-order cascaded sigma-delta modulator |
| 05/04/1995 | DE4408768C1 Method for filtering a series of digital values with an improved signal-to-noise behaviour (noise performance), and circuit arrangement for carrying out the method |
| 05/03/1995 | EP0651518A1 Cascaded sigma-delta modulators |
| 05/02/1995 | US5412387 Error reduction in switched capacitor digital-to-analog converter systems by balanced sampling |
| 04/26/1995 | EP0650261A1 Bandpass sigma-delta analog-to-digital converter (adc), method therefor, and receiver using same |
| 04/25/1995 | US5410310 Method and apparatus for extending the resolution of a sigma-delta type analog to digital converter |
| 04/18/1995 | US5408235 Second order Sigma-Delta based analog to digital converter having superior analog components and having a programmable comb filter coupled to the digital signal processor |
| 04/18/1995 | US5408233 Noise source for an analog-to-digital converter |
| 04/13/1995 | WO1995008241A3 Apparatus for and method of speech digitizing |
| 04/11/1995 | US5406135 Differential current source circuit in DAC of current driving type |
| 04/06/1995 | WO1995009486A1 Pulse density mapping method for delta sigma modulators |
| 04/04/1995 | US5404142 Data-directed scrambler for multi-bit noise shaping D/A converters |
| 03/29/1995 | EP0645893A1 Analog-to-digital converters with dither signal |
| 03/23/1995 | WO1995008241A2 Apparatus for and method of speech digitizing |
| 03/23/1995 | WO1995008221A1 Digital to analog conversion using nonuniform sample rates |
| 03/23/1995 | WO1995008220A1 Analog to digital conversion using nonuniform sample rates |
| 03/23/1995 | CA2149214A1 Apparatus for and method of speech digitizing |
| 03/21/1995 | CA1334871C Device for quantizing an input signal adaptively so that a local decoded signal never exceeds a dynamic range of the input signal |
| 03/15/1995 | EP0643488A1 Sigma-delta analog-to-digital converter with filtration having controlled pole-zero locations, and apparatus therefor |
| 03/15/1995 | EP0643477A2 Demodulation of an IF-signal by a sigma-delta converter |
| 03/08/1995 | EP0642221A1 Output filter for over-sampling digital-to-analog converter |
| 03/08/1995 | EP0641502A1 Method and apparatus for multiplexed oversampled analog to digital modulation |
| 03/07/1995 | US5396248 Noise shaping circuit |
| 03/07/1995 | US5396244 Digital-to-analog converter |
| 03/07/1995 | US5396238 Data compressing and expanding apparatus for tone generation |
| 03/01/1995 | EP0641085A1 Cascaded sigma-delta modulators |
| 03/01/1995 | EP0641075A1 Switched-capacitor circuit |
| 03/01/1995 | EP0641074A1 Switched-capacitor circuit |
| 02/21/1995 | US5392043 Double-rate sampled signal integrator |
| 02/21/1995 | US5392042 Sigma-delta analog-to-digital converter with filtration having controlled pole-zero locations, and apparatus therefor |
| 02/21/1995 | US5392039 Sigma-delta analog to digital converter |
| 02/16/1995 | WO1995005034A1 Data-directed scrambler for multi-bit noise-shaping d/a converters |
| 01/31/1995 | US5386436 Synchronization system for use in digital transmission system |
| 01/26/1995 | WO1995002923A1 Method and apparatus for calibrating a gain control circuit |
| 01/26/1995 | CA2167060A1 Method and apparatus for calibrating a gain control circuit |
| 01/25/1995 | EP0635946A1 Analog to digital converter with modulated feedback |
| 01/25/1995 | EP0635945A1 A/D converter having a variable integrator whose time constant can be changed |
| 01/25/1995 | EP0513241B1 Sigma delta modulator |
| 01/10/1995 | US5381148 Method and apparatus for calibrating a gain control circuit |
| 01/04/1995 | EP0632597A2 Audio signal transmitting apparatus and the method thereof |
| 01/03/1995 | US5379040 Digital-to-analog converter |
| 01/03/1995 | US5379039 Method and improved apparatus for stabilizing analog-to-digital circuits |
| 12/28/1994 | EP0631395A1 Signal processing circuitry comprising an input stage with variable gain |
| 12/27/1994 | US5376936 One-bit switched-capacitor D/A circuit with continuous time linearity |
| 12/27/1994 | US5376892 Sigma delta saturation detector and soft resetting circuit |
| 12/22/1994 | DE4340387C1 Method for the encoded transmission of voice (speech) signals |
| 12/14/1994 | CN1096406A Digital integrator with reduced circuit area and analog-to-digital converter using same |
| 12/07/1994 | CN1096148A Sigma-delta modulator with improved tone rejection and method therefor |
| 11/29/1994 | US5369404 Combined angle demodulator and digitizer |
| 11/29/1994 | US5369403 Dual quantization oversampling digital-to-analog converter |
| 11/17/1994 | EP0624290A1 Method for cascading sigma-delta modulators and a sigma-delta modulator system. |
| 11/13/1994 | CA2105148A1 Sigma delta converter for vortex flowmeter |
| 11/10/1994 | WO1994026068A1 Differential coding and decoding method and related circuits |
| 11/10/1994 | CA2161678A1 Differential coding and decoding method and related circuits |
| 11/08/1994 | US5363102 Offset-insensitive switched-capacitor gain stage |
| 11/08/1994 | US5363101 Analog to digital converter |
| 11/02/1994 | EP0381715B1 Digital correction circuit and method for data converters |
| 10/18/1994 | US5357252 Sigma-delta modulator with improved tone rejection and method therefor |
| 10/18/1994 | CA2020084C Voice coding/decoding system having selected coders and entropy coders |
| 10/13/1994 | WO1994023502A1 Switched capacitor one-bit digital-to-analog converter |
| 10/11/1994 | US5353801 Method for processing an electrical signal, particularly a signal derived from a heart |
| 10/04/1994 | US5352986 Closed loop power controller |
| 09/28/1994 | EP0617516A1 Sigma-delta modulator with improved tone rejection and method therefor |
| 09/27/1994 | US5351050 Detent switching of summing node capacitors of a delta-sigma modulator |
| 09/27/1994 | US5351048 One bit high speed signal processing system utilizing controlled spectrum of quantization noise |
| 09/20/1994 | US5349353 Method and apparatus for mixed analog and digital processing of delta modulated pulse streams including digital-to-analog conversion of a digital input signal |
| 09/20/1994 | US5349352 Analog-to-digital converter having high AC line noise rejection and insensitive to AC line frequency variations |
| 09/14/1994 | EP0615344A1 Improved noise shaping coder in particular sigma/delta coder |
| 09/13/1994 | US5347279 Analog/digital converter of the over-sampling type with feedback correction to offset sampling error |
| 09/13/1994 | US5347278 Pulse density mapping method and circuit for delta sigma modulators |
| 09/07/1994 | EP0614285A1 Digital-to-analog converters |
| 09/07/1994 | EP0614284A1 Thermochromic compounds, their manufacture and use |
| 09/06/1994 | US5345406 Bandpass sigma delta converter suitable for multiple protocols |
| 09/06/1994 | US5345236 Improved sigma-delta type analog-to-digital converter and method |
| 09/01/1994 | WO1994019872A1 One-bit analog-to-digital converters and digital-to-analog converters using an adaptive filter having two regimes of operation |
| 08/30/1994 | US5343197 Digital-to-analog converter |
| 08/25/1994 | DE4328974C1 Switched-capacitor network |
| 08/25/1994 | DE4328973C1 Switched-capacitor network |
| 08/24/1994 | EP0612011A1 Digital integrator with reduced circuit area and analog-to-digital converter using same |
| 08/24/1994 | EP0607299A4 Nmr receiver with sigma-delta a/d converter. |
| 08/23/1994 | US5341136 Bandpass sigma-delta modulator for analog-to-digital converters |
| 08/23/1994 | US5341135 Analogue-to-digital converters, digital-to-analogue converters, and digital modulators |
| 08/04/1994 | WO1994017588A1 Closed loop power controller |
| 08/03/1994 | EP0608492A2 Method and apparatus for delta row decompression |
| 08/02/1994 | US5334977 ADPCM transcoder wherein different bit numbers are used in code conversion |
| 07/27/1994 | EP0607714A1 Multiple stage frequency modulated circuit |
| 07/27/1994 | EP0607712A1 Frequency modulated integrator circuit |
| 07/27/1994 | EP0607299A1 Nmr receiver with sigma-delta a/d converter |
| 07/26/1994 | US5333211 Image processing apparatus for preventing occurrence of moire in a reconstructed image |
| 07/21/1994 | WO1994016501A1 Sigma-delta type analogue-to-digital converter |
| 07/19/1994 | US5331583 Running-average/decimation filter for an oversampling A/D converter |
| 07/12/1994 | US5329282 Multi-bit sigma-delta analog-to-digital converter with reduced sensitivity to DAC nonlinearities |
| 07/12/1994 | US5329281 Analog to digital converter with autoranging offset |
| 07/07/1994 | WO1994015405A1 Sigma - delta converter with multiplexed channels |
| 07/07/1994 | WO1994015404A1 Analog to digital converter and method |
| 07/06/1994 | CN1025398C Plural-order sigma-delta analog-to-digital converters using both single-bit and multiple-bit quantization |
| 07/05/1994 | US5327133 Digital integrator with reduced circuit area and analog-to-digital converter using same |
| 07/05/1994 | US5327130 Spur-free sigma-delta modulator and multiple flux quanta feedback generator |