| Patents for H03H 11 - Networks using active elements (9,098) |
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| 07/17/1990 | US4942603 Methods and apparatus for providing reciprocal impedance conversion |
| 07/11/1990 | EP0377300A2 Transversal and recursive filters |
| 07/04/1990 | EP0375790A1 Integrable filter circuit |
| 07/03/1990 | US4939473 Tracking harmonic notch filter |
| 06/27/1990 | EP0375570A2 Vibration absorption device comprising a piezoelectric element |
| 06/27/1990 | EP0374744A2 Microwave integrated circuit |
| 06/26/1990 | US4937466 Remote as signal attenuator |
| 06/22/1990 | CA2005182A1 Microwave integrated circuit |
| 06/20/1990 | CN1043234A Single input to differential output amplifier |
| 06/19/1990 | US4935957 Key telephone system |
| 06/19/1990 | US4935701 Phase shift circuit |
| 06/19/1990 | US4934770 Electronic compression system |
| 06/14/1990 | WO1990006626A1 Single input to differential output amplifier |
| 06/06/1990 | EP0371447A2 Detector circuit |
| 06/01/1990 | CA2000367A1 Single input to differential output amplifier |
| 05/23/1990 | EP0369742A2 Coupling circuit |
| 05/23/1990 | EP0122918B1 Acoustic charge transport device and method |
| 05/16/1990 | EP0368379A1 Transistor circuit with base-current compensation |
| 05/15/1990 | US4926139 Electronic frequency filter |
| 05/15/1990 | US4926135 Balanced integrator-filter arrangement |
| 05/09/1990 | EP0367657A1 Microwave phase shifter with omicron or pi phase shift |
| 05/08/1990 | US4924188 Spread spectrum receiver having phase shifter for effecting phase synchronization of two convolvers |
| 05/03/1990 | WO1990004886A1 Multiple rf signal amplification method and apparatus |
| 05/01/1990 | US4922535 Transient control aspects of circuit arrangements for altering the dynamic range of audio signals |
| 05/01/1990 | US4922131 Differential voltage threshold detector |
| 05/01/1990 | US4922127 Phase shift arrangement |
| 04/25/1990 | EP0365091A2 Filter circuit arrangement |
| 04/25/1990 | EP0364830A2 RC low-pass circuit |
| 04/24/1990 | US4920569 Digital audio signal playback system delay |
| 04/24/1990 | US4920563 Circuit compensating for the attenuation of a notch filter at frequencies less than cut-off frequency thereof |
| 04/24/1990 | US4920325 Integrated active electronic switched capacitor filter having extremely low sensitivity to variations of the components |
| 04/18/1990 | EP0364273A2 Digital demodulator system |
| 04/18/1990 | EP0363947A2 Phase shifter for clock signals |
| 04/17/1990 | US4918402 Delay circuit having at least one all-pass network |
| 04/17/1990 | US4918338 Drain-biassed transresistance device for continuous time filters |
| 04/17/1990 | US4918337 Active RC filter having band-rejection and all-pass modes |
| 04/11/1990 | EP0362935A2 Drain-biassed transresistance device |
| 04/05/1990 | DE3928936A1 CCD delay line with buried CC element - has input bias voltage adjuster for clamping signal to be delayed and its supply to delay line |
| 04/04/1990 | EP0361611A1 Active circuit for high and ultra high frequencies |
| 04/04/1990 | EP0360916A1 Monolithically integrable microwave attenuator |
| 04/03/1990 | US4914728 Wideband MMIC active quadrature hybrid |
| 04/03/1990 | US4914408 Asymmetric polyphase filter |
| 04/03/1990 | US4914401 Implementation and control of filters |
| 03/28/1990 | EP0359882A1 Noise trap circuit |
| 03/28/1990 | EP0134221B1 Tunable active filter |
| 03/27/1990 | US4912393 Voltage regulator with variable reference outputs for a hearing aid |
| 03/13/1990 | US4908530 Non-linear squelch circuit for IEEE-802. 3 protocol |
| 02/28/1990 | EP0356109A2 Electronic inductor |
| 02/28/1990 | EP0356088A2 Improvements relating to colour television signal processing |
| 02/28/1990 | EP0355329A2 Circuit for phase shifting |
| 02/20/1990 | US4903241 Read circuit having a limited-bandwidth amplifier for holding the output of a delay circuit |
| 02/07/1990 | EP0353808A1 Current compensating circuit |
| 02/01/1990 | DE3825511A1 Circuit arrangement for simulating any terminating impedances |
| 01/31/1990 | EP0352790A2 Integrator and active filter including integrator with simple phase compensation |
| 01/31/1990 | CN1039338A 传输线开关 A transmission line switch |
| 01/30/1990 | US4897610 Negative-feedback amplifier with accurately defined input or output impedance combined with high or low output or input impedance respectively |
| 01/23/1990 | US4896093 Electronic inductor |
| 01/17/1990 | EP0351009A2 Telephone line loop current regulator |
| 01/10/1990 | EP0350323A2 Transmission line switch |
| 12/27/1989 | EP0347985A1 Active allpass ultra-high frequency circuit |
| 12/26/1989 | US4890250 Hybrid estimating filter |
| 12/26/1989 | US4890170 Waveform equalization circuit for a magnetic reproducing device |
| 12/26/1989 | US4890052 Temperature constant current reference |
| 12/19/1989 | US4888560 Gain-variable amplifier circuit |
| 12/19/1989 | US4888496 Circuitry for adjusting the amplitude of analog signals |
| 12/19/1989 | US4887609 Apparatus and method for filtering electrocardiograph signals |
| 12/13/1989 | EP0345880A1 Balanced integrator-filter arrangement |
| 12/12/1989 | US4887043 Phase shifter-equalizer circuit |
| 12/12/1989 | US4886986 Output signal processor circuit of charge transfer device |
| 12/07/1989 | DE3817933A1 Circuit arrangement for delaying electrical signals |
| 12/06/1989 | EP0344855A1 Transconductance circuit |
| 12/06/1989 | EP0344852A1 Asymmetric polyphase filter |
| 12/05/1989 | US4885550 Signal input to differential output amplifier |
| 12/05/1989 | US4885528 Apparatus which uses a simulated inductor in the measurement of an electrical parameter of a device under test |
| 12/05/1989 | US4885516 Techniques for disk servo track following |
| 11/28/1989 | US4884036 Band-pass filter |
| 11/23/1989 | EP0342329A1 Controllable attenuating quadripole with a constant input and output resistance |
| 11/16/1989 | WO1989011166A1 Variable attenuator having voltage variable fet resistor with chosen resistance-voltage relationship |
| 11/14/1989 | US4881043 Variable gain transconductance amplifier and variable bandwidth filter |
| 11/02/1989 | EP0339738A1 Current divider circuit |
| 10/31/1989 | US4877979 Filter arrangement |
| 10/25/1989 | EP0338627A1 Active circuit for high and ultra-high frequencies |
| 10/24/1989 | US4876499 Differental voltage controlled exponential current source |
| 10/17/1989 | US4875023 Variable attenuator having voltage variable FET resistor with chosen resistance-voltage relationship |
| 10/17/1989 | US4875019 Receiver preamplifier with tuned circuit adapted for Loran reception |
| 10/03/1989 | US4872145 Noise trap circuit |
| 10/03/1989 | US4872127 Ripple rejection filter |
| 09/27/1989 | EP0334493A2 Continuously variable clock delay circuit |
| 09/26/1989 | CA1261073A1 Integrated circuit for implementing active filters without external components |
| 09/26/1989 | CA1260077A1 Digital phase shifter |
| 09/26/1989 | CA1260076A1 Wide range linear controller using junction field effect transistors |
| 09/20/1989 | EP0332636A1 A signal-shaping network |
| 09/19/1989 | US4868482 CMOS integrated circuit having precision resistor elements |
| 09/19/1989 | CA1259668A1 Automatically variable phase characteristic all-pass circuit |
| 09/12/1989 | US4866397 Wideband 0-90 degrees adjustable phase shifter |
| 09/06/1989 | EP0330984A2 Split-loop filter |
| 09/06/1989 | EP0330774A1 Reduction of undesired harmonic components |
| 09/05/1989 | US4864638 FM receivers using three-terminal negative admittance networks or two and three-terminal negative admittance networks |
| 09/05/1989 | US4864162 Voltage variable FET resistor with chosen resistance-voltage relationship |
| 08/29/1989 | US4860839 Weighing apparatus including active low-pass filter means |