| Patents for H03M 3 - Conversion of analogue values to or from differential modulation (7,070) |
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| 02/27/1991 | EP0414123A2 Analogue/digital converter |
| 02/26/1991 | US4996696 Waveform encoder |
| 02/19/1991 | US4995059 Predictive coding device |
| 02/19/1991 | US4994805 Delta sigma modulator arrangements compensated by chopper stabilization |
| 02/19/1991 | US4994804 Double integration delta-sigma modulation analog to digital converter |
| 02/05/1991 | US4990914 Method and apparatus for interpolative A/D conversion |
| 01/31/1991 | DE3924505A1 High solution A=D converter with analog loop filter - has inner A=D converter operated with increased scanning frequency |
| 01/22/1991 | US4987416 Analog to digital converters |
| 01/16/1991 | EP0408287A2 Correction of systematic error in an oversampled analog-to-digital converter |
| 01/16/1991 | EP0407674A1 Sigma-delta converter for performing an attenuation function and having a transfer function insensitive to the rise and fall time mismatch of the switching components |
| 01/08/1991 | US4983975 A/D converter |
| 01/08/1991 | US4983972 Video delta modulation encoder |
| 01/02/1991 | EP0405572A2 Voice coding/decoding system |
| 01/02/1991 | EP0404775A1 Method and apparatus for high resolution analog-digital-analog transformations |
| 12/18/1990 | US4979187 Predictive coding device |
| 12/12/1990 | EP0402149A2 Coding device |
| 12/11/1990 | US4977403 Digital correction circuit for data converters |
| 12/05/1990 | EP0400473A2 Digital signal processing apparatus |
| 11/28/1990 | EP0399738A2 Analogue to digital converter |
| 11/20/1990 | US4972436 High performance sigma delta based analog modem front end |
| 11/20/1990 | US4972360 Digital filter for a modem sigma-delta analog-to-digital converter |
| 11/14/1990 | EP0397564A2 Method and apparatus for coding audio signals |
| 11/14/1990 | EP0396787A1 Integrable sigma-delta modulator of the switched-capacitor type |
| 11/14/1990 | EP0396786A1 Integrable sigma-delta modulator of the switched-capacitor type |
| 11/06/1990 | US4968987 Delta-sigma modulation analog to digital converter |
| 10/02/1990 | US4961228 Method of and device for encoding a signal, for example a speech parameter such as the pitch, as a function of time |
| 09/18/1990 | US4958158 Modem with noise-reducing decoder in demodulation of encoded binary pulse signals representative of constant amplitude signals |
| 08/29/1990 | EP0384544A2 Analog-to-digital encoder and digital-to-analog decoder |
| 08/22/1990 | EP0383689A2 Digital-to-analog converter |
| 08/21/1990 | US4951052 Correction of systematic error in an oversampled analog-to-digital converter |
| 08/16/1990 | EP0381764A1 Analog operation circuit |
| 08/14/1990 | US4949383 Frequency domain speech coding |
| 08/07/1990 | US4947171 Circuit arrangement for averaging signals during pulse-density D/A or A/D conversion |
| 07/31/1990 | US4945359 A/D converter |
| 07/24/1990 | US4943807 Digitally calibrated delta-sigma analog-to-digital converter |
| 07/24/1990 | CA1271995A1 Method and apparatus for converting an analog signal to a digital signal using an oversampling technique |
| 07/17/1990 | WO1990008430A1 An ad converter |
| 07/17/1990 | CA2045568A1 Ad converter |
| 07/10/1990 | US4940977 Adaptive-filter single-bit digital encoder and decoder and adaptation control circuit responsive to bit-stream loading |
| 07/04/1990 | EP0376933A2 Digital to analog decoder |
| 07/03/1990 | US4939749 Differential encoder with self-adaptive predictive filter and a decoder suitable for use in connection with such an encoder |
| 07/03/1990 | US4939516 Chopper stabilized delta-sigma analog-to-digital converter |
| 06/28/1990 | WO1990007246A1 Predictive coding and decoding |
| 06/27/1990 | EP0375551A2 A speech coding/decoding system |
| 06/27/1990 | EP0375195A2 Time continuous, differential analog-to-digital converter |
| 06/26/1990 | US4937577 Integrated analog-to-digital converter |
| 05/30/1990 | EP0370661A2 Self-calibrating pipelined subranging analog-to-digital converter |
| 05/29/1990 | US4929947 Constant width pulse distribution in a digital to analog converter for serial digital data |
| 05/23/1990 | EP0229073B1 Improvements in or relating to analogue to digital converters |
| 05/16/1990 | EP0368610A2 A method of cascading two or more sigma-delta modulators and a sigma-delta modulator system |
| 05/15/1990 | US4926178 Delta modulator with integrator having positive feedback |
| 05/08/1990 | US4924226 Signal error compensation |
| 05/02/1990 | EP0366229A2 Noise-reducing analog-to-digital converters |
| 04/24/1990 | US4920544 Delta-sigma modulator |
| 04/17/1990 | US4918454 Compensated capacitors for switched capacitor input of an analog-to-digital converter |
| 04/17/1990 | US4916996 Musical tone generating apparatus with reduced data storage requirements |
| 03/20/1990 | US4910780 Audio signal recording and reproducing apparatus utilizing digital data compression and extension |
| 03/20/1990 | US4910751 Method and apparatus for reversible compression of information-carrying symbols |
| 03/07/1990 | EP0356598A1 Digital filter for a modem sigma-delta analog-to-digital converter |
| 02/22/1990 | WO1990001836A1 Digital correction circuit for data converters |
| 02/13/1990 | US4901077 Sigma-delta modulator for D-to-A converter |
| 02/07/1990 | EP0354060A2 Delta sigma modulator arrangement |
| 02/06/1990 | US4899155 Apparatus and method for analogue to digital conversion |
| 01/31/1990 | CN1006672B 编码装置 Encoding device |
| 01/30/1990 | US4897856 Offset correction circuit for a sigma-delta coding device |
| 01/30/1990 | US4897855 DPCM system with adaptive quantizer having unchanging bin number ensemble |
| 01/25/1990 | WO1990000836A1 Delta modulator with integrator having positive feedback |
| 01/23/1990 | US4896156 Switched-capacitance coupling networks for differential-input amplifiers, not requiring balanced input signals |
| 01/16/1990 | US4894656 Self-calibrating pipelined subranging analog-to-digital converter |
| 01/09/1990 | US4893184 Arrangement for DPCM-coding with high data rate |
| 01/09/1990 | US4893123 Transmission system having a differential pulse code modulation encoding apparatus and an associated decoding apparatus |
| 01/04/1990 | DE3822355A1 DPCM coder for high data rates |
| 01/02/1990 | US4891698 Arrangement for DPCM-coding of video signals |
| 12/20/1989 | EP0346751A2 Device for the DPCM coding of television signals |
| 12/20/1989 | EP0346750A2 Device for DPCM coding at a high data rate |
| 12/19/1989 | US4888587 Oversampling A/D converter with two capicitor arrays |
| 12/14/1989 | WO1989012280A1 Analog operation circuit |
| 12/12/1989 | US4887085 Time continuous, differential analog-to-digital converter |
| 11/23/1989 | DE3815839A1 DPCM (differential pulse code modulation) coder for multi-dimensional prediction |
| 11/21/1989 | US4882585 Method and apparatus for high resolution analog-digital-analog transformations |
| 11/15/1989 | CN1037246A Sigma-delta modulator for d-to-a converter |
| 11/01/1989 | CN1036866A Circuit arrangement for averaging signals during pulse-density d/a or a/d conversion |
| 10/25/1989 | EP0338358A2 Sigma-delta modulator for D-TO-A converter |
| 10/24/1989 | US4876544 Oversampling A/D converter comprising an additional capacitor switched in synchronism with switchin of an input capacitor |
| 10/24/1989 | US4876543 Multi-rate cascaded noise shaping modulator |
| 10/24/1989 | US4876542 Multiple output oversampling A/D converter with each output containing data and noise |
| 10/24/1989 | CA1262476A1 A modified cascode amplifier |
| 10/18/1989 | EP0337458A2 Apparatus for synthesizing analog signals in PCM |
| 10/11/1989 | EP0336502A2 Method of and device for encoding a speech parameter such as the pitch, as a function of time |
| 10/11/1989 | EP0335988A1 Circuit arrangement for averaging in the pulse density D/A or A/D conversion |
| 10/03/1989 | US4872129 Digital decimation filter |
| 09/27/1989 | EP0334714A1 Differential coder with a self-adaptive filter, and decoder for said coder |
| 09/27/1989 | CN1035923A Method and arrangement for sigma delta converter for bandpass signals |
| 09/26/1989 | US4870416 Analogue to digital converters |
| 09/21/1989 | WO1989008953A1 Method and apparatus for high resolution analog-digital-analog transformations |
| 09/12/1989 | US4866442 Analog to digital converter employing delta-sigma modulation |
| 09/06/1989 | EP0331441A2 Waveform encoder/decoder |
| 09/05/1989 | US4864304 Analog voltage signal comparator circuit |
| 08/30/1989 | CN1035215A Digital decimation filter |
| 08/29/1989 | US4862169 Oversampled A/D converter using filtered, cascaded noise shaping modulators |