| Patents for H03H 11 - Networks using active elements (9,098) |
|---|
| 01/14/1998 | EP0818884A2 Apparatus for stabilizing cut-off frequency using a transconductance |
| 01/14/1998 | EP0699359B1 Polarization current controlled electronic circuit such as an adjustable resistance, a negative resistance or a filter or similar |
| 01/13/1998 | US5708391 High frequency differential filter with CMOS control |
| 01/07/1998 | EP0817377A2 Increased bandwidth for plants with resonant modes using nonlinear notch filters |
| 01/07/1998 | EP0817376A2 Reduced phase-shift nonlinear filters |
| 01/07/1998 | EP0816857A2 Differential attenuator common mode rejection correction circuit |
| 01/07/1998 | EP0815643A1 Npn bipolar circuit topology for a tunable transconductance cell and positive current source |
| 01/07/1998 | EP0686288B1 Signal processing circuit comprising switched transconductors |
| 01/06/1998 | US5705954 Differential output type filter circuit |
| 01/06/1998 | US5705937 Apparatus for programmable dynamic termination |
| 12/31/1997 | CN1169061A Amplifier circuit for sound frequency signal |
| 12/30/1997 | US5703912 Clock-recovery device having cascaded resonance amplifiers |
| 12/30/1997 | US5703523 Filter circuit |
| 12/30/1997 | US5703514 Digital frequency divider phase shifter |
| 12/24/1997 | WO1997049216A1 Improved coding system for digital transmission compression |
| 12/24/1997 | CA2258682A1 Improved coding system for digital transmission compression |
| 12/23/1997 | US5701107 Phase shifter circuit using field effect transistors |
| 12/23/1997 | US5701100 Second-order highpass difference filter |
| 12/23/1997 | US5701099 Transconductor-C filter element with coarse and fine adjustment |
| 12/17/1997 | CN1036750C Direct-current impressing circuit |
| 12/16/1997 | US5699019 Active filter |
| 12/16/1997 | US5699016 Differential active filter of the second order |
| 12/11/1997 | DE19647656C1 Monolithic integratable adjustable impedance |
| 12/10/1997 | EP0812065A2 Active filter |
| 12/10/1997 | EP0812060A1 Filter circuit with frequency adjustment |
| 12/10/1997 | EP0756783A4 Impedance emulator |
| 12/10/1997 | EP0742941A4 Tracking filter for periodic signals |
| 12/03/1997 | EP0810728A1 Analog audio filter for high frequencies |
| 12/02/1997 | US5694439 Bi-directional low pass filtering method and apparatus |
| 12/02/1997 | US5694093 Wideband IQ modulator with RC/CR automatic quadrature network |
| 12/02/1997 | US5694088 Phase locked loop with improved phase-frequency detection |
| 12/02/1997 | US5694077 Reduced phase-shift nonlinear filters |
| 11/27/1997 | WO1997044896A1 Arrangement and method in a telesystem |
| 11/26/1997 | CN1166070A Method and filter for isolating upstream ingress noise in bi-directional cable system |
| 11/20/1997 | DE19720017A1 90 Degree phase shifter with half frequency divider |
| 11/20/1997 | DE19645567A1 Integrated low pass filter and high pass filter circuits |
| 11/19/1997 | CN1165437A Phase shift apparatus |
| 11/13/1997 | DE19718945A1 Upstream interference isolating filter for bidirectional cable system |
| 11/12/1997 | CN1164782A Integrated receiver |
| 11/11/1997 | US5686863 Tunable tone control circuit and a device and method for tuning the RC constants |
| 11/11/1997 | US5686861 Filter circuit |
| 10/30/1997 | WO1997033379A3 Circuit arrangement with a filter quadripole |
| 10/29/1997 | EP0803981A1 Tuning circuit |
| 10/29/1997 | EP0803980A1 Tuning circuit |
| 10/29/1997 | EP0803860A2 A noise reduction circuit, a noise reduction apparatus and a noise reduction method |
| 10/29/1997 | EP0659311A4 Bridge-tap equalizer method and apparatus. |
| 10/28/1997 | US5682122 Opto-electronic transconductors |
| 10/22/1997 | EP0802415A1 A shock detector |
| 10/22/1997 | EP0801851A1 Damped emi input filter for power factor correction circuits |
| 10/22/1997 | CN1162868A Demodulator circuit using gyrator circuit |
| 10/21/1997 | US5680060 Method of and circuit arrangement for terminating a line connected to a CMOS integrated circuit |
| 10/21/1997 | CA2071035C Digitally controlled element sizing |
| 10/16/1997 | DE19622656C1 Filter circuit arrangement with frequency regulation |
| 10/16/1997 | DE19614655A1 Automatic antenna matching device for short wave station |
| 10/15/1997 | EP0801399A2 Analog delay circuit |
| 10/14/1997 | CA2076857C Circuit for an output resonant cavity in a frequency-shift transmitter output stage |
| 10/08/1997 | EP0800218A2 Variable capacitance and method for making the same |
| 10/07/1997 | US5675277 Phase shifting apparatus and method with frequency multiplication |
| 10/07/1997 | US5675269 Semiconductor device including resistor having precise resistance value |
| 10/02/1997 | DE19630395C1 Electrical mute control circuit for audio signal |
| 09/30/1997 | US5673003 Amplifier circuit having a variable bandwidth |
| 09/24/1997 | EP0797292A1 Integrated receiver |
| 09/24/1997 | CN1160307A 匹配滤波器电路 Matched filter circuit |
| 09/18/1997 | WO1997034366A1 A cmos microwave multiphase voltage controlled oscillator |
| 09/17/1997 | EP0795244A1 Coupling arrangement in a terminating circuit |
| 09/17/1997 | CN2262779Y High-frequency fixed attenuator |
| 09/17/1997 | CN1159656A Semiconductor IC |
| 09/12/1997 | WO1997033379A2 Circuit arrangement with a filter quadripole |
| 09/11/1997 | DE19609054A1 Schaltungsanordnung mit einem Filtervierpol Circuitry with a Filtervierpol |
| 09/11/1997 | DE19608966A1 Analogue signal phase and amplitude adjustment method |
| 09/10/1997 | EP0794610A1 Constant high Q voltage controlled oscillator and method for making same |
| 09/09/1997 | US5666089 Monolithic step attenuator having internal frequency compensation |
| 09/09/1997 | US5666087 Active resistor for stability compensation |
| 09/09/1997 | US5666083 Discrete programming methodology and circuit for an active transconductance-C filter |
| 09/04/1997 | WO1997032396A1 Frequency-dependent resistor |
| 09/03/1997 | EP0793345A1 Pseudo-NMOS or PMOS inverter |
| 09/03/1997 | CN1158516A Boosting pulse generation circuit |
| 09/03/1997 | CN1158501A Intermediate potential generation circuit |
| 09/03/1997 | CN1158500A Potential generation circuit |
| 09/02/1997 | US5663690 Constant high Q voltage controlled oscillator |
| 09/02/1997 | US5663676 Active filter independently controlling cut-off frequency and quality factor |
| 09/02/1997 | US5663675 Multiple stage tracking filter using a self-calibrating RC oscillator circuit |
| 09/02/1997 | US5663670 Controllable variable delay inverter for a process tolerant delay circuit |
| 08/27/1997 | EP0792019A1 A wired-or multiplexer device |
| 08/27/1997 | EP0792010A1 Frequency tracking filter, signal processing circuit with tunable transconductance and mehtod of controlling a transconductance circuit |
| 08/27/1997 | CN2261114Y Constant-phase-shift frequency-selective detector arrangement for direction-measuring machine |
| 08/27/1997 | CN1158180A Circuit bias via transformation |
| 08/26/1997 | US5661679 Delay circuit having a plurality of memory cells and corresponding control circuits for controlling the movement of a signal through the memory cells |
| 08/26/1997 | US5661435 Low noise wide band amplifier |
| 08/26/1997 | US5661432 Linear tunable Gm-C integrator |
| 08/19/1997 | US5659264 Temperature drift stabilized filter circuit |
| 08/14/1997 | WO1997029545A1 Quadrature oscillator having amplitude control means based on a trigonometric identity |
| 08/12/1997 | US5656978 Control circuit and method for direct current controlled attenuator |
| 08/02/1997 | CA2168601A1 Amplifier-less low power switched-capacitor techniques |
| 07/30/1997 | EP0786862A1 Linear time invariant electrical system with variable transfer function parameters and line impedance synthesis circuit including such a system |
| 07/30/1997 | EP0583306B1 Device and method for adjusting a bandpass filter, especially a combiner filter |
| 07/29/1997 | US5652538 Integrated curcuit with conductance adjustable by digital control signal |
| 07/29/1997 | US5652537 Impedance multiplier |
| 07/24/1997 | WO1997026706A1 Npn bipolar circuit topology for a tunable transconductance cell and positive current source |
| 07/24/1997 | DE19634098C1 Filter for digital television signals |