| Patents for H03H 19 - Networks using time-varying elements, e.g. n-path filters (1,194) |
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| 02/13/1985 | EP0132885A1 Multiplying circuit comprising switched-capacitor circuits |
| 02/05/1985 | US4498063 Switched capacitor filter having a reduced capacitance |
| 01/09/1985 | EP0130873A1 Switched capacitor band-pass filter |
| 01/02/1985 | EP0130107A1 Switched capacitor filter simulating an LC filter |
| 11/28/1984 | EP0126337A2 Switched-capacitor AGC system |
| 11/27/1984 | CA1178668A1 Switched-capacitor source resistor simulation circuit |
| 11/20/1984 | US4484358 Receiver having switched capacitor filter |
| 11/20/1984 | US4484089 Switched-capacitor conductance-control of variable transconductance elements |
| 10/09/1984 | US4476448 Switched capacitor high-pass filter |
| 09/26/1984 | EP0119627A2 Modulator circuit realized as a switched capacitor filter |
| 09/19/1984 | EP0118482A1 Switched capacitor filter. |
| 08/28/1984 | US4468798 Dual charge pump envelope generator |
| 08/28/1984 | US4468749 Adjustable attenuator circuit |
| 08/28/1984 | CA1173522A1 Switched capacitor stage with differential output |
| 08/21/1984 | CA1173121A1 Simulation circuit employing switched capacitors |
| 08/21/1984 | CA1173118A1 Intergrator with sampling stage |
| 08/14/1984 | US4466106 Frequency shift keyed modem chip set |
| 08/14/1984 | CA1172709A1 Multiple function operational amplifier circuit |
| 07/31/1984 | CA1171967A1 Digital to analog converter |
| 07/17/1984 | US4460953 Signal voltage dividing circuit |
| 07/10/1984 | US4459698 Variable equalizer |
| 07/10/1984 | CA1170579A1 Reverberation apparatus |
| 07/03/1984 | US4458216 For use in a communications system |
| 06/19/1984 | US4455539 Switched capacitor all pass filter |
| 06/13/1984 | EP0110477A1 Clock-controlled filtering arrangement |
| 06/13/1984 | EP0110130A1 Circuit producing an output free from a leakage between output and input ends |
| 06/05/1984 | CA1168719A1 Switched-capacitor resistor simulation circuits |
| 05/30/1984 | EP0109612A2 Switched capacitor filter circuit |
| 05/08/1984 | CA1167122A1 Switched-capacitor source resistor simulation circuit |
| 05/01/1984 | US4446438 Switched capacitor n-path filter |
| 04/17/1984 | US4443757 For processing a variable electrical signal |
| 03/27/1984 | US4439756 Delta-Sigma modulator with switch capacitor implementation |
| 03/21/1984 | EP0103410A2 Switched-capacitor stage with differential output |
| 03/20/1984 | US4438525 Reverberation apparatus |
| 03/15/1984 | WO1984001065A1 Switched capacitor filter |
| 02/28/1984 | CA1162996A1 Switched-capacitor floating-inductor simulation circuit |
| 02/28/1984 | CA1162995A1 Switched capacitor bilinear resistors |
| 02/22/1984 | EP0101338A1 Switched capacitor bilinear differential intergrator free from parasitic capacitance |
| 02/14/1984 | US4431929 CMOS Dynamic amplifier |
| 01/31/1984 | US4429285 Frequency-controlled variable-gain amplifiers |
| 01/31/1984 | US4429281 Integrator for a switched capacitor-filter |
| 01/31/1984 | US4429239 Combined phase detector and low pass filter |
| 01/25/1984 | EP0020379B1 Voltage reversing switch |
| 01/03/1984 | CA1159910A1 Switched-capacitor cosine filter |
| 01/03/1984 | CA1159909A1 Switched-capacitor interpolation filter |
| 12/28/1983 | EP0096857A2 Transmission filter with biquadratic filter stages |
| 12/27/1983 | US4423289 Signal processing systems |
| 11/30/1983 | EP0095216A2 Multiplier/adder circuit |
| 11/29/1983 | CA1157922A1 Switched-capacitor elliptic filter |
| 11/22/1983 | US4417214 Monolithic IC general purpose active filter |
| 11/09/1983 | EP0093644A2 Switched capacitor circuit |
| 11/01/1983 | CA1156343A1 Electronic filter |
| 10/19/1983 | EP0091672A2 Characteristic switching circuit |
| 09/29/1983 | WO1983003326A1 Combined phase detector and low pass filter |
| 09/20/1983 | US4405899 High pass filter and method of making same |
| 09/20/1983 | CA1154106A1 Low-pass filter for low-frequency signals |
| 09/13/1983 | US4404525 Switched capacitor gain stage with offset and switch feedthrough cancellation scheme |
| 09/06/1983 | CA1153431A1 Sampling filter for reducing aliasing distortion |
| 08/23/1983 | US4400637 Integrator with sampling stage |
| 08/09/1983 | US4398099 Switched-capacitance amplifier, a switched-capacitance filter and a charge-transfer filter comprising an amplifier of this type |
| 07/27/1983 | EP0084474A2 First order high pass filter and application in telephony |
| 07/27/1983 | EP0084353A2 Delta-sigma modulator with switched capacitor implementation |
| 07/05/1983 | US4392068 Capacitive commutating filter |
| 07/05/1983 | CA1149479A1 Low sensitivity switched-capacitor ladder filter using monolithic mos chip |
| 05/17/1983 | US4384277 Digital to analog converter |
| 05/17/1983 | US4384276 Capacitive DAC to filter interface circuit |
| 05/10/1983 | US4383305 Simulation circuit employing switched capacitors |
| 05/10/1983 | US4383228 Filter device comprising switched-capacitance integrating networks |
| 04/26/1983 | CA1145422A1 Digitally programmable active rc bandpass filter with constant absolute bandwidth |
| 04/26/1983 | CA1145420A1 Amplifier apparatus having low-pass characteristic |
| 04/13/1983 | EP0076737A1 Symmetrical integrator and use in a filter |
| 04/13/1983 | EP0076736A1 Integrated circuit having an inductive characteristic, and filter using the same |
| 03/30/1983 | EP0075161A1 Switched-capacitor modulator |
| 03/29/1983 | US4378538 Assembly for filtering by switching |
| 03/01/1983 | US4375625 Switched-capacitor source resistor simulation circuit |
| 02/16/1983 | EP0071845A2 Apparatus for compensating hearing deficiencies |
| 01/25/1983 | US4370632 Multiple function operational amplifier circuit |
| 01/18/1983 | CA1139848A1 Filter for analog signals |
| 12/28/1982 | US4366456 Switched-capacitor filter |
| 12/28/1982 | US4366455 Two layers of aluminum on silica |
| 12/21/1982 | US4365217 Charge-transfer switched-capacity filter |
| 12/14/1982 | US4364116 Switched-capacitor filter circuit having at least one simulated inductor |
| 12/14/1982 | CA1137573A1 Band pass filter circuit |
| 11/24/1982 | EP0065219A2 Signal voltage dividing circuit |
| 11/16/1982 | CA1135801A1 Quadrature transposition stage |
| 11/11/1982 | WO1982003957A1 Digital to analog converter |
| 11/11/1982 | WO1982003956A1 A capacitive dac to filter interface circuit |
| 11/11/1982 | WO1982003955A1 A multiple function operational amplifier circuit |
| 10/26/1982 | US4356464 Filter for electric signals consisting of switches, capacitors and amplifiers |
| 10/12/1982 | US4354250 Switched-capacitor source resistor simulation circuit |
| 10/12/1982 | US4354169 Switched-capacitor filter circuit having at least one simulated inductance having controlled switches, capacitors, and an amplifier |
| 10/05/1982 | US4353044 Switched-capacitor filter circuit having at least one simulated inductor and having a resonance frequency which is one-sixth of the sampling frequency |
| 09/28/1982 | US4352069 Switched capacitance signal processor |
| 09/15/1982 | EP0060026A1 Gain stage with operational amplifier and switched capacitor resistor equivalent circuit |
| 09/07/1982 | US4348114 Method of inspecting coated web material to detect the presence of downlines thereon |
| 08/18/1982 | EP0058113A2 Switched capacitor filter and modem using such a filter |
| 08/10/1982 | US4344050 Dual channel digitally switched capacitor filter |
| 08/10/1982 | CA1129509A1 Switched capacitor elliptic filter |
| 07/27/1982 | US4342001 Differential amplifier having a low-pass characteristic |
| 07/06/1982 | US4338571 Low sensitivity switched-capacitor ladder filter using monolithic MOS chip |