| Patents for H03H 11 - Networks using active elements (9,098) |
|---|
| 09/15/1981 | US4290027 Fail-safe active bandpass filter using a modified twin-T filter |
| 09/09/1981 | EP0035180A2 Circuit arrangement for increasing the inductance of a transformer |
| 09/08/1981 | US4288754 Filter circuit |
| 09/08/1981 | US4288707 Electrically variable impedance circuit |
| 08/27/1981 | EP0029027A4 Antenna low-noise q spoiling circuit. |
| 08/19/1981 | EP0034064A2 Adjustable and selective electrical filters and methods of tuning them |
| 08/18/1981 | US4284965 Tone control device |
| 08/18/1981 | CA1107397A1 Charge transfer device |
| 08/11/1981 | US4283695 High isolation multicoupling apparatus |
| 08/04/1981 | CA1106457A1 Phase-locked loop |
| 07/29/1981 | EP0032737A2 Electrical filter circuit using at least one simulated inductance, comprising controlled switches, capacitors and amplifiers |
| 07/28/1981 | CA1106005A1 Negative impedance converters |
| 07/21/1981 | US4280102 Frequency response characteristic adjustable circuit |
| 07/21/1981 | US4280089 Automatic incrementing attenuation arrangement |
| 07/15/1981 | EP0031950A2 Memory device |
| 07/14/1981 | CA1105100A1 Hybrid integrated impedance converter circuit |
| 07/07/1981 | US4277756 Amplifier circuit arrangement for aperiodic signals |
| 07/07/1981 | CA1104667A1 Capacitance magnification circuit |
| 06/23/1981 | US4275453 Smoothing filter for digital to analog conversion |
| 06/23/1981 | US4275357 Active filter |
| 06/10/1981 | EP0029920A2 Integrated delay circuit |
| 06/09/1981 | US4272735 Single amplifier variable gyrator |
| 06/09/1981 | CA1102917A1 Charged coupled device with bulk transport |
| 06/02/1981 | US4271483 Delay circuits |
| 06/02/1981 | US4271366 Analog signal delay circuit |
| 05/27/1981 | EP0029239A1 Low-pass filtering circuit and method of using the same |
| 05/27/1981 | EP0029027A1 Antenna low-noise q spoiling circuit. |
| 05/26/1981 | US4270093 Apparatus for forcing a phase-lock oscillator to a predetermined frequency when unlocked |
| 05/19/1981 | US4268807 Band-pass filter and gain stage |
| 05/12/1981 | US4267535 Switching circuit consisting of CTD lines |
| 05/12/1981 | CA1101101A1 Variable response notch filter for machine resonance elimination in a servo control system |
| 05/05/1981 | US4266204 Delay line signal equalizer for magnetic recording signal detection circuits |
| 04/28/1981 | CA1100201A1 Programmable attenuator apparatus employing active fet switching |
| 04/28/1981 | CA1100198A1 Filter for digital-to-analog converter |
| 04/14/1981 | US4261369 His bundle cardiography |
| 04/07/1981 | US4260968 Active filter network utilizing positive impedance converters |
| 03/31/1981 | US4259741 Satellite relay system |
| 03/17/1981 | US4257006 Integrable analog active filter and method of same |
| 03/10/1981 | US4255701 Variable phase shift apparatus |
| 03/10/1981 | US4255676 Semiconductor phase shift device for a charge transfer filter |
| 02/24/1981 | US4253069 Filter circuit having a biquadratic transfer function |
| 02/18/1981 | EP0023943A1 Receiving and amplifying circuitry for high frequency signals |
| 02/17/1981 | CA1096042A1 Introducing signal to charge-coupled circuit |
| 02/10/1981 | US4250411 Dynamic resistor current leakage compensation arrangement |
| 01/28/1981 | EP0022938A1 Device for increasing the parallel inductance of telephone line transformers |
| 01/20/1981 | US4246542 Filter using a state-variable biquadratic transfer function circuit |
| 01/20/1981 | CA1093860A1 Signal processors utilizing tuneable band-pass filters and trigger circuits |
| 01/13/1981 | US4245202 Floating gyrator having a current cancellation circuit |
| 01/13/1981 | US4244262 Echo-machine employing low pass filters with a variable cut-off frequency |
| 01/07/1981 | EP0021462A2 Pass filter circuit arrangement |
| 01/07/1981 | EP0021020A1 Selective filter circuit with high quality factor |
| 01/06/1981 | US4243918 Signal integrator with time constant controlled by differentiating feedback |
| 12/30/1980 | US4242656 Current pumped voltage divided absorbor |
| 12/30/1980 | US4242642 Pole quality factor (Q) enhancement technique for notch filters |
| 12/30/1980 | US4242600 Digital CCD arrangement |
| 12/23/1980 | US4241395 Non-dissipative DC active filter and transformer |
| 12/11/1980 | WO1980002782A1 Antenna low-noise q spoiling circuit |
| 12/09/1980 | US4238744 Frequency band dividing filter using delay-line filter |
| 12/09/1980 | CA1091349A1 Device for reproducing the charge stored in an input capacitor in a plurality of output capacitors |
| 12/02/1980 | CA1090707A1 Adaptive filter for companding system |
| 11/18/1980 | US4234807 Ladder device with weighting factor adjusting means |
| 11/18/1980 | CA1089986A1 Operating circuitry for semiconductor charge coupled devices |
| 11/18/1980 | CA1089983A1 Video record player system |
| 11/04/1980 | US4232399 Continuously variable phase shift network |
| 11/04/1980 | US4232280 Network for simulating low temperature resistors |
| 11/04/1980 | CA1089038A1 Controllable electronic resistance device |
| 11/04/1980 | CA1089036A1 Phase control circuit |
| 10/28/1980 | US4230951 Wave shaping circuit |
| 10/21/1980 | CA1192627B Sampled analog filters |
| 10/21/1980 | CA1088161A1 Sampled analog filters |
| 10/14/1980 | US4228544 Antenna system using antenna base impedance transforming means |
| 10/14/1980 | US4228409 Transmission arrangement having an adjustable network |
| 10/07/1980 | US4227205 Hue and saturation control circuitry requiring single coupling capacitor |
| 10/07/1980 | US4227152 Method and device for training an adaptive equalizer by means of an unknown data signal in a quadrature amplitude modulation transmission system |
| 09/30/1980 | US4225834 Equalizing network having a plurality of frequency sensitive attenuation branches in a negative feedback arrangement |
| 09/17/1980 | EP0015719A1 Improvements in or relating to bandstop filters |
| 09/16/1980 | US4223272 Four-terminal network of adjustable transfer function |
| 09/16/1980 | US4223181 Method and apparatus for processing signals |
| 09/02/1980 | US4220875 Electronic circuit having its impedance controlled by an external signal |
| 09/02/1980 | CA1085052A1 Charge coupled circuit arrangements and devices |
| 08/26/1980 | US4219745 Backlash filter apparatus |
| 08/26/1980 | CA1084642A1 Bidirectional voice frequency repeater |
| 08/20/1980 | EP0014506A1 Low-pass filter for low-frequency signals |
| 08/19/1980 | US4218774 Automatic gain control circuit |
| 08/07/1980 | WO1980001611A1 Loran c-navigation receiver |
| 08/06/1980 | EP0013943A1 Monolithically integratable low-pass filter circuit |
| 07/22/1980 | CA1082314A1 Receiver automatic gain control system |
| 07/15/1980 | US4213065 Device for providing a selectively variable proportion of an electrical signal |
| 07/09/1980 | EP0012876A1 Low frequency active bandpass filter |
| 07/08/1980 | US4212025 Voltage dividing integrated circuit device |
| 07/08/1980 | CA1081362A1 Balanced regenerative charge detection circuit for semiconductor charge transfer devices |
| 07/01/1980 | US4210882 Delay network comprising a chain of all-pass sections |
| 06/17/1980 | US4208641 Hybrid integrated impedance converter circuit |
| 06/17/1980 | US4208635 Active filter and phase-locked loop using same |
| 06/17/1980 | CA1079538A1 Electronic tachometer with variable bandwidth differentiator |
| 06/12/1980 | WO1980001227A1 Selective amplifier |
| 06/10/1980 | US4207543 Adaptive filter network |
| 06/10/1980 | CA1079379A1 Electronic arrangement for generating two alternating voltages whose phases are shiftable relative to each other |
| 05/28/1980 | EP0011446A1 A frequency characteristic-adjusting circuit |
| 05/27/1980 | US4205283 Signal delay system |