| Patents for H03M 3 - Conversion of analogue values to or from differential modulation (7,070) |
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| 10/06/1998 | US5818375 Digital-to-analog converter |
| 10/06/1998 | US5818374 Switched current delta-sigma modulator |
| 10/06/1998 | US5818370 Integrated CODEC with a self-calibrating ADC and DAC |
| 09/30/1998 | EP0769222B1 Improved sigma-delta fm demodulator |
| 09/29/1998 | US5815530 Data converters for sound equipment |
| 09/29/1998 | US5815207 Method for coding a video signal |
| 09/29/1998 | US5815102 Delta sigma pwm dac to reduce switching |
| 09/23/1998 | EP0866548A1 Differential integrating amplifier with switched capacitor circuit for precision input resistors |
| 09/23/1998 | EP0865685A1 Data compression and expansion of an audio signal |
| 09/22/1998 | US5812078 Josephson junction digital to analog converter for accurate AC waveform synthesis |
| 09/09/1998 | EP0863607A1 Method and apparatus for linearizing an efficient class D/E power amplifier using delta modulation |
| 09/08/1998 | US5805093 Oversampled high-order modulator |
| 09/01/1998 | US5802108 Waveform correction apparatus |
| 09/01/1998 | US5801652 Digital signal processor for processing digital data |
| 08/27/1998 | WO1998037636A1 Voice encoding method |
| 08/27/1998 | CA2282278A1 Voice encoding method |
| 08/18/1998 | US5796360 Fast sigma-delta modulator having a controlled clock generator |
| 08/18/1998 | US5796359 Data conversion and processing system |
| 08/11/1998 | US5794021 Variable frequency clock generation circuit using aperiodic patterns |
| 08/11/1998 | US5793811 Stabilization scheme of delta-sigma modulator |
| 08/11/1998 | US5793249 System for providing tight program/erase speeds that are insensitive to process variations |
| 08/04/1998 | US5790064 Apparatus and method for switching capacitors within a switched capacitor circuit at times selected to avoid data dependent loading upon reference voltage supplies |
| 08/04/1998 | US5790063 Signal processing circuit |
| 08/04/1998 | US5790062 Delta modulator with pseudo constant modulation level |
| 07/29/1998 | CN1189016A Signal processors |
| 07/28/1998 | US5786779 Digital-to-analog converter which uses a sigma-delta modulation |
| 07/28/1998 | US5786778 Variable sample-rate DAC/ADC/converter system |
| 07/22/1998 | EP0854579A2 Analogue to digital conversion circuit with interference suppression filter |
| 07/22/1998 | EP0719478B1 Digital to analog conversion using nonuniform sample rates |
| 07/21/1998 | US5784017 Analogue and digital convertors using pulse edge modulators with non-linearity error correction |
| 07/16/1998 | WO1998031105A1 Delta sigma analog-to-digital converter |
| 07/14/1998 | US5781138 System and method for generating a sigma-delta correction circuit |
| 07/14/1998 | US5781137 System and method for reducing errors in a delta-sigma converter |
| 07/07/1998 | US5777908 Comb filter with a smaller number of delay elements |
| 07/07/1998 | US5777568 Analog/digital and digital/analog converting apparatus |
| 07/07/1998 | US5777512 Method and apparatus for oversampled, noise-shaping, mixed-signal processing |
| 07/01/1998 | EP0851589A2 Second order demodulator for sigma-delta digital to analogue converter |
| 07/01/1998 | CN1186386A Band-pass sigma-delta converter and commutating filter therefor |
| 06/30/1998 | US5774842 Noise reduction method and apparatus utilizing filtering of a dithered signal |
| 06/25/1998 | WO1998020488A3 Data processing of a bitstream signal |
| 06/17/1998 | EP0748537A4 Sigma-delta converter having a digital logic gate core |
| 06/16/1998 | US5768316 Mixing circuit utilizing N inputs and a number of decimation filters that is less than N |
| 06/16/1998 | US5768315 Band-pass sigma-delta converter and commutating filter therefor |
| 06/09/1998 | US5765013 Digital signal processor |
| 06/09/1998 | US5764171 Quadrature signal conversion device |
| 06/03/1998 | EP0845779A2 Storage and transmission of one-bit data |
| 06/03/1998 | CN1183864A Balance companded delta conversion for homodyne receiver |
| 06/03/1998 | CN1183680A 1-bit digital signal processing device, recording device and reproducing device |
| 06/02/1998 | US5761210 Signal processing apparatus and method |
| 06/02/1998 | US5760728 Input stage for an analog-to-digital converter and method of operation thereof |
| 06/02/1998 | US5760723 Delta-sigma analog-to-digital converter including charge coupled devices |
| 06/02/1998 | US5760722 Distributed quantization noise transmission zeros in cascaded sigma-delta modulators |
| 05/27/1998 | CN1183179A Slope, drift and offset compensation in zero-if receivers |
| 05/26/1998 | US5757867 Digital mixing to baseband decimation filter |
| 05/26/1998 | US5757301 Instability recovery method for sigma-delta modulators |
| 05/26/1998 | US5757300 Feed-forward bandpass delta-sigma converter with tunable center frequency |
| 05/26/1998 | US5757299 Analog-Digital converter using delta sigma modulation digital filtering, and gain-scaling |
| 05/19/1998 | US5754131 Low power delta sigma converter |
| 05/14/1998 | WO1998020488A2 Data processing of a bitstream signal |
| 05/12/1998 | US5751771 Waveform data compression apparatus and waveform data expansion apparatus |
| 05/06/1998 | CN1181163A A fast sigma-delta modulator having controlled clock generator |
| 05/06/1998 | CN1180962A Digital-to-analog conversion apparatus |
| 05/05/1998 | US5748126 Sigma-delta digital-to-analog conversion system and process through reconstruction and resampling |
| 04/28/1998 | US5745523 Multi-mode signal processing |
| 04/28/1998 | US5745061 Method of improving the stability of a sigma-delta modulator employing dither |
| 04/28/1998 | US5745060 Gain calibration circuitry for an analog to digital converter |
| 04/22/1998 | EP0673576A4 Apparatus for and method of speech digitizing. |
| 04/22/1998 | CN1179650A Analog-to-digital conversion apparatus |
| 04/21/1998 | US5742246 Stabilizing mechanism for sigma-delta modulator |
| 04/16/1998 | WO1998016014A1 Data compression and expansion of an audio signal |
| 04/15/1998 | EP0835556A2 Method and apparatus for multiplexed oversampled analog to digital modulation |
| 04/15/1998 | EP0712549A4 Data-directed scrambler for multi-bit noise-shaping d/a converters |
| 04/07/1998 | US5736953 For sampling-and-holding an analog input signal |
| 04/07/1998 | US5736950 Sigma-delta modulator with tunable signal passband |
| 04/07/1998 | US5736895 Biquadratic switched-capacitor filter using single operational amplifier |
| 04/01/1998 | EP0832517A2 Hybrid analog-to-digital converter for low power applications, such as use in an implantable medical device |
| 03/31/1998 | US5734683 Demodulation of an intermediate frequency signal by a sigma-delta converter |
| 03/25/1998 | EP0830739A1 Digitally controlled oscillator for a phase-locked loop |
| 03/24/1998 | US5732105 Method of estimating signal quality in a DPSK demodulator |
| 03/24/1998 | US5731769 Multi-rate digital filter apparatus and method for sigma-delta conversion processes |
| 03/19/1998 | WO1998011683A1 Arrangements and methods for generating a radio frequency signal |
| 03/19/1998 | WO1998011668A1 Wide dynamic range a/d converter |
| 03/17/1998 | US5729232 Combination shared capacitor integrator and digital-to-analog converter circuit with data dependency cancellation |
| 03/17/1998 | US5729230 Delta-Sigma Δ-Σ modulator having a dynamically tunable continuous time Gm-C architecture |
| 03/17/1998 | US5729229 Data independent loading of a reference in a sampled data integrator |
| 03/17/1998 | US5729225 Method and apparatus for asynchronous digital mixing |
| 03/11/1998 | CN1175824A Switched capacitor digital-analog converter with decreased harmonic distortion |
| 03/11/1998 | CN1175819A Signal processing apparatus and method for sound field processing of sigma-delta modulated digital signal |
| 03/10/1998 | US5727024 Circuit configuration for conversion of a one-bit digital signal into an analog signal |
| 03/10/1998 | US5727023 Apparatus for and method of speech digitizing |
| 03/04/1998 | CN1175133A Improved structure for data compression coder, decoder and recording medium |
| 03/03/1998 | US5724038 Noise cancelling circuit and arrangement |
| 03/03/1998 | US5724037 Data acquisition system for computed tomography scanning and related applications |
| 02/24/1998 | US5721547 Analog-to-digital converter employing DC offset cancellation after modulation and before digital processing |
| 02/17/1998 | US5719577 For converting an analog signal into a digital signal |
| 02/17/1998 | US5719573 Analog modulator for A/D converter utilizing leap-frog filter |
| 02/17/1998 | US5719572 Digital signal processor with reduced pattern dependent noise |
| 02/11/1998 | EP0823154A1 Method and device for transmitting analogue signals by means of a transmission system using optical transmission lines |
| 02/11/1998 | EP0823146A2 Reduced complexity signal converter |
| 02/11/1998 | EP0695481B1 Switched capacitor one-bit digital to analog converter and sigma delta modulator using the same |