| Patents for H03M 3 - Conversion of analogue values to or from differential modulation (7,070) |
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| 08/29/1989 | US4862168 Audio digital/analog encoding and decoding |
| 08/22/1989 | US4860315 ADPCM encoding and decoding circuits |
| 08/22/1989 | US4860313 Adaptive differential pulse code modulation (ADPCM) systems |
| 08/22/1989 | US4860012 Integrated analog-to-digital converter |
| 08/22/1989 | US4859883 Digital circuit arrangement for quantization-noise reduction |
| 08/16/1989 | EP0328318A2 Delta-sigma modulator |
| 08/15/1989 | US4857928 Method and arrangement for a sigma delta converter for bandpass signals |
| 08/15/1989 | CA1258532A1 Coding device selectively connected to a transmission line |
| 08/10/1989 | WO1989007368A1 Method and arrangement for a sigma delta converter for bandpass signals |
| 08/02/1989 | EP0325926A2 Oversampling A/D converter and method for performing A/D conversion |
| 08/01/1989 | CA1258131A1 Switched capacitance feedback control circuit and sigma-delta modulator using same |
| 07/25/1989 | US4852125 Adaptive quantizing device for use in a differential encoder |
| 07/25/1989 | US4851841 Gain scaling of oversampled analog-to-digital converters |
| 07/25/1989 | CA1257930A1 A-d encoder and d-a decoder system |
| 07/19/1989 | EP0324584A2 Predictive coding device |
| 07/18/1989 | US4849758 System for transmitting or storing input signals |
| 07/11/1989 | US4847866 Differential pulse code modulation scheme incorporating a reconstructed value constrainer |
| 06/27/1989 | US4843391 System for analog-digital-analog conversion |
| 06/27/1989 | US4843390 Oversampled A/D converter having digital error correction |
| 06/21/1989 | EP0320517A1 Digital decimation filter |
| 06/13/1989 | US4839897 Fault detecting system for ADPCM codec |
| 06/13/1989 | US4839649 Signal processing system |
| 06/06/1989 | US4837527 Switched capacitor arrangement |
| 05/23/1989 | US4833474 A/D converter |
| 05/10/1989 | CN1032890A Adaptive-filter single-bit digital encoder and decorder and adaptation control circuit responsive to bit-stream loading |
| 05/09/1989 | US4829299 Adaptive-filter single-bit digital encoder and decoder and adaptation control circuit responsive to bit-stream loading |
| 04/26/1989 | EP0312672A1 Offset correction circuit for a sigma-delta coding device |
| 03/29/1989 | EP0308982A2 Analog-to-digital converter having an excellent signal-to-noise ratio for small signals |
| 03/29/1989 | EP0308826A2 Adaptive-filter single-bit digital encoder and decoder with adaptation control circuit responsive to bitstream loading |
| 03/29/1989 | EP0186763B1 Method of and device for speech signal coding and decoding by vector quantization techniques |
| 03/28/1989 | CA1251865A1 Continuously variable slope delta modulation using digital vector for slope control |
| 03/22/1989 | EP0308194A2 Multi-stage noise shaping over-sampling D/A converter |
| 03/21/1989 | EP0199745A4 Analog-to-digital converter. |
| 03/07/1989 | US4811398 Method of and device for speech signal coding and decoding by subband analysis and vector quantization with dynamic bit allocation |
| 03/07/1989 | US4811019 Delta modulation encoding/decoding circuitry |
| 03/07/1989 | US4810912 Current switch |
| 02/21/1989 | US4807250 Coding device selectively connected to a transmission line |
| 01/18/1989 | EP0299711A2 An audio signal recording and reproducing apparatus |
| 01/11/1989 | EP0298216A2 Circuit for PCM conversion of an analogic signal, with improvement in gain-tracking |
| 01/04/1989 | EP0297503A2 Oversampling a/d converter with two capacitor arrays |
| 01/03/1989 | US4796004 Integrated analog-to-digital converter |
| 01/03/1989 | CA1248234A1 Frequency domain speech coding |
| 12/20/1988 | US4792794 Differential pulse code modulation system with neutralization of direct current information |
| 12/13/1988 | US4791670 Method of and device for speech signal coding and decoding by vector quantization techniques |
| 12/07/1988 | EP0293780A2 Analog-to-digital converter employing delta-sigma modulation |
| 12/07/1988 | EP0293415A1 Method and apparatus for reversible compression of information-carrying symbols |
| 12/06/1988 | US4789862 Analogue to digital converters |
| 11/08/1988 | US4783644 Continuously variable slope delta modulation using digital vector for slope control |
| 10/26/1988 | EP0288281A2 ADPCM encoding and decoding systems |
| 10/18/1988 | US4779225 Adaptive digital filter |
| 10/12/1988 | EP0286138A2 Oversampling a/d converter comprising an additional capacitor switched in synchronism with switching of an input capacitor |
| 10/11/1988 | US4777472 Modified cascode amplifier |
| 10/04/1988 | US4775986 DPCM decoding circuit for digital samples |
| 10/04/1988 | US4775851 Analog-to-digital converter |
| 09/21/1988 | EP0283167A2 Audio digital/analog encoding and decoding |
| 09/20/1988 | US4772871 Delta sigma modulator circuit for an analog-to-digital converter |
| 09/13/1988 | US4771439 Differential coding circuit with reduced critical path applicable to DPCM |
| 08/30/1988 | US4768018 Analog to digital converter for an electronic circuit breaker with out-of-supply-range input signals |
| 08/23/1988 | CA1241116A1 Method of and device for speech signal coding and decoding by vector quantization techniques |
| 07/26/1988 | CA1239704A1 Oversampling converter |
| 07/19/1988 | CA1239480A1 Wideband adaptive prediction |
| 07/12/1988 | US4757517 System for transmitting voice signal |
| 07/05/1988 | CA1238979A1 Higher order interpolation for digital-to-analog conversion |
| 06/15/1988 | EP0271166A2 Digital circuit arrangement for reducing the quantizing noise |
| 06/14/1988 | US4751736 Variable bit rate speech codec with backward-type prediction and quantization |
| 06/08/1988 | EP0269758A1 Current change-over switch |
| 05/31/1988 | US4748503 Data reduction circuit with a differential pulse code modulator for video signals |
| 05/24/1988 | US4746899 Method for reducing effects of electrical noise in an analog-to-digital converter |
| 05/19/1988 | WO1988003729A1 Method and apparatus for reversible compression of information-carrying symbols |
| 05/18/1988 | EP0267254A1 Analogue to digital converters |
| 04/27/1988 | EP0264999A2 System for transmitting or memorizing input signals |
| 04/05/1988 | US4736188 Analog to digital converters |
| 03/09/1988 | EP0080725B1 Method and apparatus for a/d conversion |
| 03/03/1988 | DE3728514A1 Verfahren und vorrichtung zum erzeugen eines differenz-pulscodemodulations (dpcm)-signals A method and apparatus for generating a differential pulse code modulation (DPCM) signal |
| 01/12/1988 | CA1231452A1 Method and apparatus for a/d conversion |
| 12/29/1987 | US4715257 Waveform generating device for electronic musical instruments |
| 12/15/1987 | CA1230425A1 Digitally controlled syllabic filter for a delta modulator |
| 11/25/1987 | EP0246701A1 DPCM coder and associated decoder |
| 11/19/1987 | WO1987007098A1 Analogue to digital converters |
| 11/10/1987 | US4706260 DPCM system with rate-of-fill control of buffer occupancy |
| 11/10/1987 | US4706066 Switch capacitor D/A converter having a distortion reducing capacitor |
| 11/03/1987 | US4704600 Oversampling converter |
| 10/28/1987 | EP0242413A1 Data reducing circuit with a differential pulse code modulator for video signals |
| 10/21/1987 | EP0241922A2 Musical tone generating apparatus |
| 10/14/1987 | EP0241077A1 Encoding device |
| 10/14/1987 | CN87102565A 编码装置 Encoding device |
| 09/15/1987 | CA1226950A1 System and method for adpcm transmission of speech or like signals |
| 09/08/1987 | US4692737 Encoding device |
| 09/08/1987 | US4692719 Combined pacemaker delta modulator and bandpass filter |
| 09/02/1987 | EP0234640A1 DPCM decoding circuit |
| 08/04/1987 | US4684925 Method and apparatus for converting an analog signal to a digital signal using an oversampling technique |
| 08/04/1987 | US4684898 Temperature and process variation compensation for a delta demodulation decoder |
| 07/29/1987 | EP0230001A1 Method of and device for speech signal coding and decoding by subband analysis and vector quantization with dynamic bit allocation |
| 07/29/1987 | EP0229764A1 Interpolative analogue to digital converter. |
| 07/28/1987 | CA1224877A1 Double integration, delta-sigma, analog-digital coder |
| 07/22/1987 | EP0229073A1 Improvements in or relating to analogue to digital converters. |
| 07/21/1987 | CA1224545A1 Integrated circuits |
| 07/15/1987 | EP0228696A2 ADPCM coder-decoder including partial band energy transition detection |
| 06/30/1987 | US4677423 ADPCM coder-decoder including partial band energy transition detection |
| 06/23/1987 | US4675884 Decoding circuit |