| Patents for H03H 19 - Networks using time-varying elements, e.g. n-path filters (1,194) |
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| 03/24/1998 | US5732002 Multi-rate IIR decimation and interpolation filters |
| 03/17/1998 | US5729232 Combination shared capacitor integrator and digital-to-analog converter circuit with data dependency cancellation |
| 03/11/1998 | CN1175824A Switched capacitor digital-analog converter with decreased harmonic distortion |
| 03/04/1998 | CN1175124A Imitating first-in first-out memory and switch device |
| 03/03/1998 | US5724000 Differential switched capacitor filtering |
| 02/17/1998 | US5719573 Analog modulator for A/D converter utilizing leap-frog filter |
| 02/11/1998 | EP0695481B1 Switched capacitor one-bit digital to analog converter and sigma delta modulator using the same |
| 02/04/1998 | EP0822659A2 Switched capacitor circuit |
| 01/28/1998 | EP0821483A2 SC-filter with intrinsic anti-aliasing function and audio signal processor provided with the same |
| 01/28/1998 | EP0821479A2 Filter circuit and audio signal processor comprising the same |
| 01/14/1998 | CN1170303A Oscillator and phase-locked loop employing same |
| 01/07/1998 | EP0686288B1 Signal processing circuit comprising switched transconductors |
| 12/16/1997 | US5699006 DC blocking apparatus and technique for sampled data filters |
| 12/10/1997 | CN1167369A Piezoelectric resonator and electronic element using it |
| 12/03/1997 | EP0810730A2 Analog FIFO memory and switching device |
| 10/23/1997 | DE19630416C1 Audio signal filter with anti=aliasing function |
| 10/21/1997 | US5680072 Differential interpolating switched capacitor filter and method |
| 10/08/1997 | EP0799527A1 Differential switched capacitor filtering |
| 10/01/1997 | EP0706663B1 Electrical test instrument |
| 09/30/1997 | US5673007 Frequency synthesizer having PLL receiving filtered output of DDS |
| 09/24/1997 | CN1160307A 匹配滤波器电路 Matched filter circuit |
| 09/23/1997 | CA2109561C Switched capacitor circuit having reduced capacitance units |
| 09/02/1997 | US5663675 Multiple stage tracking filter using a self-calibrating RC oscillator circuit |
| 08/19/1997 | US5659314 Delta sigma modulator using a switched capacitor |
| 08/19/1997 | US5659269 Zero phase error switched-capacitor phase locked loop filter |
| 08/02/1997 | CA2168601A1 Amplifier-less low power switched-capacitor techniques |
| 07/30/1997 | EP0786863A2 Switch closing time controlled variable capacitor |
| 06/17/1997 | US5640082 Duty cycle controlled switch variable capacitor circuit |
| 06/10/1997 | US5638020 Switched capacitor differential circuits |
| 06/03/1997 | US5635828 Active filter circuit and power supply apparatus including same |
| 05/27/1997 | US5634202 Method and apparatus for integrating a plurality of analog input signals prior to transmitting a communications signal |
| 05/27/1997 | CA2115182C Narrow-band filter having a variable center frequency |
| 05/02/1997 | EP0771071A1 Matched filter circuit |
| 04/29/1997 | US5625361 Programmable capacitor array and method of programming |
| 04/24/1997 | WO1997015115A1 Differential switched capacitor filtering |
| 04/22/1997 | USRE35494 Integrated active low-pass filter of the first order |
| 04/02/1997 | CN1146665A Circuit matched with wave filter |
| 04/01/1997 | US5617054 Switched capacitor voltage error compensating circuit |
| 03/06/1997 | WO1997008629A1 Methods and systems for designing and making signal-processor circuits with internal companding, and the resulting circuits |
| 03/04/1997 | US5608345 Programmable switched capacitor circuit |
| 02/18/1997 | US5604927 Receiver having an adjustable bandwidth filter |
| 01/29/1997 | EP0756377A1 Matched filter circuit |
| 01/22/1997 | EP0755160A2 Comb filter device |
| 01/14/1997 | US5594556 Scanner having a misalignment detector |
| 01/02/1997 | DE19523432A1 Frequency-converting system |
| 12/31/1996 | US5589847 Switched capacitor analog circuits using polysilicon thin film technology |
| 12/18/1996 | EP0749205A1 Switched capacitor gain stage |
| 12/04/1996 | EP0746099A2 A MOS switching circuit |
| 11/28/1996 | WO1996037953A1 Multi-rate iir decimation and interpolation filters |
| 11/20/1996 | EP0743749A1 Method and device for reducing the sensibility to phase errors of a band-pass filter |
| 11/19/1996 | USRE35379 Completely differential filter with switched condensers using CMOS operational amplifiers with no common-mode feedback |
| 11/12/1996 | US5574671 True/complementer for a half-band filter |
| 11/12/1996 | US5574457 Switched capacitor gain stage |
| 11/06/1996 | EP0741350A2 Switch capacitor interface circuit |
| 11/05/1996 | US5572107 Switched capacitor network |
| 10/23/1996 | EP0353308B1 Semiconductor device |
| 10/08/1996 | US5563573 For emulating a relativity high input impedance |
| 10/02/1996 | EP0735669A2 Switched capacitor differential circuits |
| 09/17/1996 | US5557187 Switched capacitor network |
| 08/20/1996 | US5548542 Half-band filter and method |
| 07/30/1996 | US5541600 Signal processing circuit including a variable gain input stage |
| 07/30/1996 | US5541531 Switch capacitor interface circuit |
| 07/04/1996 | CA2150861A1 Flip-flop with programmable sliding set-up and hold window |
| 06/04/1996 | US5523719 Component insensitive, analog bandpass filter |
| 05/15/1996 | EP0712203A1 Programmable capacitor array and method of programming |
| 05/07/1996 | US5514999 Differential switched capacitor circuit |
| 05/07/1996 | US5514997 Inverting delay circuit |
| 04/24/1996 | EP0708320A2 Signal processing circuit |
| 04/17/1996 | EP0706663A1 Electrical test instrument |
| 04/03/1996 | EP0704119A1 Double sampled biquad switched capacitor filter |
| 03/27/1996 | CN1119366A Active filter circuit and power supply apparatus including same |
| 03/05/1996 | US5497116 Method and apparatus for processing signals |
| 02/28/1996 | CN1117667A Switched capacitor bandpass filter for detecting pilot signal |
| 02/27/1996 | US5495200 Double sampled biquad switched capacitor filter |
| 02/27/1996 | US5495199 Switched capacitor circuit |
| 02/15/1996 | DE19512858A1 Switched capacitor bandpass filter for pilot signal recognition |
| 02/13/1996 | US5491453 Narrow-band filter having a variable center frequency |
| 02/07/1996 | EP0695481A1 Switched capacitor one-bit digital to analog converter and sigma delta modulator using the same |
| 02/07/1996 | CN1116469A Method and apparatus for integrating a plurality of input signals |
| 02/07/1996 | CN1116464A Method and apparatus for detecting an input signal level |
| 12/27/1995 | EP0689286A1 Low voltage, switched capacitance circuit employing switched operational amplifiers with maximized voltage swing |
| 12/19/1995 | US5477481 Switched-capacitor integrator with chopper stabilization performed at the sampling rate |
| 12/13/1995 | EP0686324A1 Receiver having an adjustable bandwidth filter |
| 12/13/1995 | EP0686288A1 Signal processing circuit comprising switched transconductors |
| 12/12/1995 | US5475337 Switched capacitor amplifier circuit |
| 12/05/1995 | US5473685 Telecommunications end station with electrically controlled terminating impedance |
| 10/25/1995 | EP0678980A1 Low distortion circuit with switched capacitors |
| 10/12/1995 | DE4411693A1 Signal transfer unit with noise reduced by correlated double sampling |
| 10/10/1995 | US5457421 Voltage stepdown circuit including a voltage divider |
| 08/17/1995 | WO1995019073A3 Receiver having an adjustable bandwidth filter |
| 08/08/1995 | US5440306 Switched capacitor circuit having reduced capacitance units |
| 08/08/1995 | US5440270 Linear-phase filter having high gain selectivity |
| 07/13/1995 | WO1995019073A2 Receiver having an adjustable bandwidth filter |
| 06/20/1995 | US5426393 Tunable filter network having DC accuracy |
| 06/13/1995 | US5424670 Precision switched capacitor ratio system |
| 05/31/1995 | EP0655753A1 Active filter circuit and power supply apparatus including same |
| 05/23/1995 | CA1335674C Electronic filters, signal conversion apparatus, hearing aids and methods |
| 05/18/1995 | WO1995013664A1 Method and apparatus for integrating a plurality of input signals |
| 05/18/1995 | WO1995013655A1 Method and apparatus for detecting an input signal level |
| 05/17/1995 | EP0653855A1 A differential switched capacitor circuit |