Patents for H03H 11 - Networks using active elements (9,098) |
---|
12/27/1991 | EP0249623B1 Enhanced quadrature notch filter |
12/24/1991 | US5075582 Integratable bandpass filter circuit |
12/18/1991 | EP0461922A2 Integration circuit |
12/16/1991 | CA2044501A1 Linear phase low pass filter |
12/12/1991 | WO1991019353A1 Solid state mutually coupled inductors |
12/10/1991 | US5072298 Auto-tuning circuit for an active filter used in video signal processing |
12/10/1991 | US5072200 Combination of active and passive filters |
12/10/1991 | US5071660 Scavenging oxygen from the interior of a container |
12/10/1991 | CA1293033C Matching circuit |
12/03/1991 | US5070305 Device for converting unbalanced analog electric signals into fully differential signals |
11/28/1991 | WO1991018427A1 Attenuator including a switchable gain stage |
11/28/1991 | WO1991018341A1 Adaptive threshold suppression of impulse noise |
11/21/1991 | EP0456921A1 Attenuator |
11/14/1991 | WO1991017602A1 Delay circuit |
11/14/1991 | DE4015019A1 Audio circuit with electronically controlled transmission - has feedback amplifier followed by voltage divider with controlled tap-off switching |
11/13/1991 | EP0456321A2 Circuit with controlled transfer characteristic |
11/06/1991 | EP0455298A1 Electrically controllable oscillator circuit and electrically controllable filter arrangement comprising said circuit |
11/06/1991 | EP0455156A2 Circuit for generating an analog output signal, phase shifted by 90 degrees relative to an input signal |
11/05/1991 | US5063356 Balanced filter circuit having a controllable balanced current multiplier |
11/05/1991 | US5063311 Programmable time delay circuit for digital logic circuits |
11/05/1991 | US5063309 High frequency continuous time filter |
10/24/1991 | DE4012265A1 Schaltungsanordnung fuer einen ausgangstankkreis einer mit frequenzumtastung betriebenen sender-endstufe Circuit arrangement for an output tank circuit powered by a frequency shift keying transmitter-power amplifier |
10/23/1991 | EP0453158A2 Switched-current integrator circuit |
10/23/1991 | EP0452776A2 A delay line providing an adjustable delay |
10/23/1991 | EP0452452A1 Loop filter for a frequency synthesizer. |
10/18/1991 | WO1991016762A1 Circuit for an output resonant cavity in a frequency-shift transmitter output stage |
10/17/1991 | DE4110340A1 Digital multiplexer-controlled delay generator - uses groups of current-switching elements to vary propagation delay in connection input voltage to load |
10/16/1991 | EP0451909A2 Predistortion linearizer for microwave power amplifiers |
10/16/1991 | CN1055436A Integrated circuit for analog system |
10/15/1991 | US5057722 Delay circuit having stable delay time |
10/09/1991 | EP0450866A2 Semiconductor capacitor circuit |
10/09/1991 | EP0450863A2 Integrated circuit for analog system |
10/04/1991 | CA2039421A1 Semiconductor capacitor circuit |
10/02/1991 | EP0449319A2 Circuit for reducing microphony |
10/01/1991 | US5053650 Monolithic semiconductor integrated circuit device having current adjusting circuit |
09/30/1991 | CA2039363A1 Method and a circuit for reducing microphony |
09/25/1991 | EP0448264A2 Phase shifting circuits |
09/24/1991 | US5051628 Integrated filter circuit |
09/24/1991 | CA1289619C Reactance circuit |
09/18/1991 | EP0446275A1 Single input to differential output amplifier |
09/17/1991 | US5049841 Electronically reconfigurable digital pad attenuator using segmented field effect transistors |
09/17/1991 | US5049831 Single-ended input to differential output amplifier with integral two-pole filter |
09/17/1991 | US5049764 Active bypass for inhibiting high-frequency supply voltage variations in integrated circuits |
09/17/1991 | CA1289199C Phase shift circuit |
09/11/1991 | CN1013912B Single input to differential output amplifier |
09/10/1991 | US5048055 Multi-data rate selectable equalizer |
09/10/1991 | US5047866 Comb filter type luminance/chrominance signal separation circuit |
09/04/1991 | EP0445057A2 Multi-data rate selectable equalizer |
09/04/1991 | EP0444838A2 Video signal reproducing apparatus |
09/03/1991 | US5045822 Active power splitter |
09/03/1991 | US5045731 Ultraminiature 180 degree phase shifter |
09/03/1991 | US5045713 Multi-feedback circuit apparatus |
09/03/1991 | CA1288486C Implementation and control of filters |
08/28/1991 | EP0443732A2 Load circuit for differential driver |
08/27/1991 | US5043610 Electrical coupling circuit for passing a varying signal and blocking a direct component thereof |
08/21/1991 | EP0442492A2 Active filter |
08/20/1991 | US5041745 Failsafe bandpass filter/decoder |
08/14/1991 | EP0441716A1 Voltage controlled resistor |
08/14/1991 | EP0441378A2 Frequency and/or phase characteristic control circuit |
08/13/1991 | US5039960 Wideband feedforward gallium arsenide AGC circuit |
08/13/1991 | US5039893 Signal delay device |
08/13/1991 | US5039891 Planar broadband FET balun |
08/13/1991 | US5039890 Integratable filter circuit |
08/08/1991 | DE4003417A1 Verfahren zum abgleich analoger schaltungsteile innerhalb einer integrierten schaltung Method of adjustment-analog circuit components within an integrated circuit |
08/06/1991 | WO1991011857A1 Device for equalizing analog circuit parts in an integrated circuit |
08/06/1991 | US5038328 Band pass filter |
08/06/1991 | US5038113 Nonlinearity generator using FET source-to-drain conductive path |
08/06/1991 | US5038060 Active very-high frequency circuit of the all-pass type utilizing an RC network whose capacitance is the gate-source capacitance of a FET |
07/31/1991 | EP0439230A2 Active bypass for inhibiting high-frequency supply voltage variations in integrated circuits |
07/31/1991 | EP0438911A1 Integrated filter circuit |
07/24/1991 | EP0437970A2 Analog filter |
07/17/1991 | CN2081172U Impedance transformer |
07/16/1991 | US5032801 High performance attenuator configuration |
07/11/1991 | WO1991010286A1 Phase shifter |
07/09/1991 | US5030927 Reactance control circuit with a DC amplifier for minimizing a variation of a reference reactance value |
07/09/1991 | US5030848 Precision voltage divider |
07/04/1991 | DE4041298A1 Band pass filter circuit with operational amplifier - has signal attenuator between external input terminal and amplifier non-inverting input terminal |
07/03/1991 | EP0435472A2 Active filter |
07/02/1991 | US5029284 Precision switchable bus terminator circuit |
07/02/1991 | US5028884 Leapfrog filter having adjustable center frequency and quality factor |
06/19/1991 | EP0432895A2 Phase splitter arrangement |
06/19/1991 | EP0432851A2 Variable bi-phase modulator circuits and variable resistors |
06/13/1991 | WO1991008533A1 Terminal, data processor, switching unit, interface, and keyboard the latter three connected to the former two |
06/12/1991 | EP0431900A2 Filter circuit |
06/12/1991 | CN1012875B Impedance converter |
06/11/1991 | US5023568 Combined current differencing and operational amplifier circuit |
06/11/1991 | US5023491 Filter circuit arrangements with automatic adjustment of cut-off frequencies |
06/06/1991 | DE3939906A1 Frequency filter of first or higher order - has circuit structure of analog components and delay of seperational amplifiers of constant group transition time |
06/05/1991 | EP0429896A2 Tunable resonance amplifier or oscillator |
06/04/1991 | US5021756 Transversal and recursive filters useable in a diplexer |
05/30/1991 | WO1991007822A1 Loop filter for a frequency synthesizer |
05/28/1991 | US5020100 Telephone line loop current regulator |
05/15/1991 | EP0427105A1 A circuit for processing the signal generated by an electromagnetic rotation sensor |
05/14/1991 | US5015965 Predistortion equalizer with resistive combiners and dividers |
05/07/1991 | US5014228 Method and apparatus for calibrating linear delay lines |
04/30/1991 | US5012384 Load circuit for a differential driver |
04/30/1991 | US5012201 Variable impedance circuit |
04/30/1991 | US5012141 Signal delay device using CMOS supply voltage control |
04/23/1991 | US5010305 Microwave integrated circuit |
04/16/1991 | US5008565 High-impedance FET circuit |