| Patents for H03H 11 - Networks using active elements (9,098) |
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| 12/08/1988 | DE3725732C1 PLL with variable oscillator - has control circuit with filter using low cut=off amplifier to attenuate phase noise |
| 12/08/1988 | DE3718097A1 Bandpass-filter Bandpass filter |
| 12/06/1988 | US4789999 Line circuit for coupling a subscriber set to a switching facility to provide a complex impedance match |
| 12/06/1988 | CA1246168A1 Two-terminal negative admittance network |
| 12/06/1988 | CA1246165A1 Active transconductance filter device |
| 12/06/1988 | CA1246164A1 Digitally controlled wideband phase shifter |
| 12/01/1988 | WO1988009585A1 Band-pass filter |
| 11/29/1988 | US4788461 Solid state inductance simulator |
| 11/29/1988 | US4787686 Monolithic programmable attenuator |
| 11/22/1988 | US4786880 Filter arrangement |
| 11/22/1988 | US4786879 Attenuator circuit employing bootstrapping |
| 11/22/1988 | CA1245309A2 Low pass filter circuit |
| 11/15/1988 | US4785253 Integrated electric filter with adjustable RC parameters |
| 11/15/1988 | US4785250 Electrical component simulator |
| 11/15/1988 | CA1244896A1 Analog circuit improvement in a digital integrated circuit technology |
| 11/08/1988 | US4783643 Impedance transforming circuit for multibit parallel digital circuits |
| 11/08/1988 | US4783635 Low pass filter circuit |
| 11/03/1988 | WO1988008645A1 Antenna coupler |
| 11/02/1988 | EP0289310A2 A filtered source of DC voltage |
| 11/02/1988 | EP0289099A1 Negative-feedback amplifier with accurately defined input or output impedance combined with high or low output or input impedance respectively |
| 11/01/1988 | US4782305 Differential input-single output two pole filter implemented by a single amplifier |
| 11/01/1988 | US4782246 Phase shift circuit for electrical signal |
| 10/25/1988 | US4780690 Filter arrangement having a transconductance circuit |
| 10/18/1988 | US4779056 Active filter |
| 10/11/1988 | CA1243112A1 Charge-coupled semiconductor device with dynamic control |
| 10/04/1988 | CA1242765A1 Arrangement for combining the output signals from a plurality of transmitters tuned to the same frequency |
| 09/29/1988 | DE3709169A1 Antenna coupler |
| 09/28/1988 | EP0225332A4 Balanced variable reactance circuit and method of producing the same. |
| 09/22/1988 | WO1988007288A1 Monolithic microwave phase shifting network with multiple outputs between which a constant phase difference is maintained over a large frequency range |
| 09/21/1988 | EP0283056A1 Active 0-180 degrees ultra high frequency phase shifter |
| 09/15/1988 | DE3706928A1 Method for influencing predetermined frequency channels within a frequency range and graphic equaliser for carrying out the method |
| 09/14/1988 | EP0282293A2 Non-ferrite non-reciprocal phase shifter and circulator |
| 09/07/1988 | EP0281371A2 Band-pass filter |
| 09/07/1988 | CN87206662U 多用途电子电位器 Multipurpose electronic potentiometer |
| 09/06/1988 | CA1241711A1 Low-pass filter circuit |
| 08/30/1988 | US4767998 Active filter using low gain amplification stages |
| 08/30/1988 | CA1241386A1 Second order all pass network |
| 08/24/1988 | EP0279349A2 Complementary acoustic charge transport devices and method |
| 08/23/1988 | US4766562 Digital analyzing and synthesizing filter bank with maximum sampling rate reduction |
| 08/23/1988 | US4766559 For providing an analog signal input |
| 08/23/1988 | US4766395 Circuits to provide desired conductance characteristics using a FET |
| 08/17/1988 | EP0278534A1 Broadband phase shifter |
| 08/02/1988 | CA1239876A1 Variable emphasis circuit |
| 07/26/1988 | US4760542 Delay circuit for digital signals |
| 07/20/1988 | EP0274784A1 Filter arrangement |
| 07/12/1988 | US4757270 High gain feedback amplifier |
| 07/06/1988 | EP0273425A2 Filter circuit |
| 07/06/1988 | EP0273365A2 Filter adjustment apparatus and method |
| 07/06/1988 | EP0273303A2 Filter adjustment apparatus and method |
| 07/05/1988 | US4755771 Equalizing circuit |
| 06/29/1988 | EP0272702A2 System for automatically controlling the gain-bandwidth product of operational amplifiers |
| 06/29/1988 | EP0162056B1 Single adjustment phase resolver with constant amplitude output |
| 06/28/1988 | US4754497 FM receivers using three-terminal negative admittance networks or two and three-terminal negative admittance networks |
| 06/28/1988 | US4754224 Circuit arrangement for converting an input voltage into a proportional output signal |
| 06/15/1988 | EP0271294A1 Knock detection circuit |
| 06/08/1988 | EP0270192A2 Filter |
| 06/08/1988 | EP0270156A1 Filter arrangement |
| 06/07/1988 | US4749951 Low-pass filter circuit with variable time constant |
| 06/02/1988 | WO1988004114A1 A signal-shaping network |
| 06/01/1988 | EP0269162A1 Filter arrangement |
| 06/01/1988 | CN85102784B Individual adjustable single capacitor two-step low-pass active filter |
| 05/31/1988 | US4748426 Active termination circuit for computer interface use |
| 05/31/1988 | US4748422 Amplifier circuit suitable for use as an active filter circuit |
| 05/31/1988 | US4748419 Isolation amplifier with precise timing of signals coupled across isolation barrier |
| 05/17/1988 | US4745370 Adjustable phase shift circuit |
| 04/20/1988 | EP0264161A2 Active filter with bootstrapping |
| 04/19/1988 | US4739196 Wide range linear inpedance controller using junction field effect transistors |
| 04/19/1988 | US4739189 Rapid slewing filter |
| 04/14/1988 | DE3633726A1 Transmitting and receiving device for vehicles |
| 04/12/1988 | US4737739 Monolithic FET bridge attenuator |
| 04/12/1988 | US4737734 Controlling a semi-conductor resistance defining component |
| 04/12/1988 | US4737703 Variable phase shifting circuit |
| 04/12/1988 | US4737662 Differential phase shifter |
| 04/06/1988 | EP0262156A1 Cmos voltage translator |
| 04/05/1988 | US4736459 FM receivers using two-terminal negative admittance networks |
| 04/05/1988 | US4736432 Electronic siren audio notch filter for transmitters |
| 04/05/1988 | US4736166 Attenuation circuit |
| 03/30/1988 | EP0261935A2 Electronically controlled matching circuit |
| 03/29/1988 | US4734598 Controllable integrator |
| 03/23/1988 | EP0260753A1 Delay circuit comprising all-pass networks |
| 03/23/1988 | EP0260346A2 Device for setting an analogous resistor to a preselected digital value |
| 03/22/1988 | US4733205 Electrical filter |
| 03/15/1988 | US4731590 Circuits with multiple controlled gain elements |
| 03/15/1988 | US4731587 Enhanced quadrature notch filter |
| 03/10/1988 | DE3629938A1 Circuit arrangement with an electronic choke |
| 03/10/1988 | DE3629937A1 Circuit arrangement with an electronic choke |
| 02/24/1988 | EP0256580A1 Gyrator simulating an inductance |
| 02/16/1988 | US4725794 Receiver multicoupler using no-loss signal splitter |
| 02/16/1988 | US4725789 Circuit arrangement for a low-noise audio frequency source |
| 02/09/1988 | US4724407 Integrated filter circuit having switchable selected parallel filter paths |
| 02/02/1988 | US4723318 Active polyphase filters |
| 01/27/1988 | EP0254072A1 Signal phase shift circuit |
| 01/27/1988 | EP0254011A2 Adjustable impedance driver network |
| 01/26/1988 | US4721920 For the implementation of an electrical filter |
| 01/26/1988 | CA1232037A1 Filter arrangement |
| 01/12/1988 | US4719369 Output circuit having transistor monitor for matching output impedance to load impedance |
| 01/07/1988 | EP0251690A2 Circuits with multiple controlled gain elements |
| 01/05/1988 | US4718111 Arrangement for combining the output signals from a plurality of transmitters tuned to the same frequency |
| 12/29/1987 | US4716580 Charge transfer analog comparator and devices using such a comparator |
| 12/15/1987 | US4713627 Active filter with bootstrapping |