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7522023 Gyrator with feedback resistors  
A gyrator includes a gyrator core and at least one common mode feedback circuit. The gyrator core includes four inverters mutually connected in a loop configuration between a pair of input ends and...
7512389 Active inductors using bipolar silicon transistors  
An active inductor includes bipolar transistors T 1 , T 2 , T 3 and TD (TD being arranged in diode), where T 1 's emitter is connected to an output port and to T 2 's collector. T 2 's base is...
7342458 Negative gain transductance amplifier circuit  
The invention proposes a negative gain transconductance amplifier circuit ( 1 ) for capacitive load that includes: an RC serial circuit connected between an input terminal (E) of the amplifier...
7292092 Tunable poly-phase filter and method for calibration thereof  
A resonator circuit is shown that is fabricated with substantially identical elements disposed symmetrically along an axis such that the circuit has a linear response to bias current. The alignment...
7274276 Amplifier circuit, gyrator circuit, filter device and method for amplifying a signal  
An amplifier circuit comprising a transconductor device connected to a phase shifter section. The phase shifter section has an adjustable phase shift and an impedance at least partially dependent...
7253707 Tunable active inductor  
An active inductor capable of tuning a self-resonant frequency, an inductance, a Q factor, and a peak Q frequency by applying a tunable feedback resistor to a cascode-grounded active inductor is...
7215227 Gm-C filter compensation  
Compensation of effects derived from bandwidth limitations of an active frequency-selective circuit is effected by appropriately coupling a resistance to the frequency-selective circuit. In one...
7199685 Three-terminal, tunable active inductor  
The present invention provides an active inductor apparatus and system, having a variable frequency response through inductance adjustment. The active inductor apparatus comprises a variable...
7068130 Active inductor  
An active inductor circuit (L) includes first (T 1 ) and second (T 2 ) terminals for coupling to respective external terminals (Hi,Lo), said first and second terminals being coupled to a first...
7058382 Method of eliminating a DC component and filtering device obtained by this method  
A radiotelephony device employing filters and methods for eliminating a DC component from an electronic signal provide for circuitry having a zero corresponding to a cut-off frequency, and...
7042317 High-frequency active inductor  
An active inductor circuit implemented in sub-micron CMOS semiconductor technology is usable at gigaHertz frequencies and includes an input node, a non-inverting transconductor circuit comprising a...
7012487 Transconductance device employing native MOS transistors  
A system on chip such as a radio receiver has reduced suceptibility to voltages in the bulk silicon by using gyrator elements in the receiver with each gyrator element including a plurality of...
6737944 Active inductor  
A transistor M 1 has its drain connected to a source of a transistor M 2 through a capacitor Cc 3 . A series connection of a resistor R and a capacitor Cc 1 is provided between a source of the...
6577212 Integrated circuit  
The invention relates to an integrated gyrator structure, in which each transistor in the gyrator core (preferably MOS devices) has series feedback associated therewith. This allows for...
6545569 Filtering device and method of eliminating a DC component by shifting the transfer function  
Filters and methods for eliminating a DC component from an electronic signal provide for circuitry having a zero corresponding to a cut-off frequency, and circuitry for shifting the zero by an...
6515560 Active inductor  
An active inductor includes an MOSFET having a gate, a drain serving as an output terminal and a grounded source, the MOSFET having a transconductance gm 1, and a capacitor having opposite ends,...
6404308 Phase-compensated impedance converter  
Integrated circuits, for example, gyrator circuits include transistors that are preferably MOS devices and that are provided with series feedback networks, which compensate for the effects of...
6340916 Ransimpedance amplifier circuit  
An innovated transimpedance amplifier circuit consists of a buffer circuit, a simulation resistance circuit, and an amplifier circuit. The buffer circuit for inputting a signal circuit is...
6317016 Method and arrangement for gyration filtering with low power consumption  
An arrangement of differential amplifying-type gyrators is used to implement a signal-filtering circuit with significantly reduced power consumption. One specific example implementation is directed...
6107893 Voltage tunable active inductorless oscillator  
An inductorless voltage controlled oscillator that may be fabricated using CMOS circuit elements. In one aspect, the present invention includes a synthetic inductance formed on a substrate and...
5825265 Grounded inductance circuit using a gyrator circuit  
First and second transconductance amplifiers OTA 1, OTA 2, each having two input terminals, and two output terminals are constructed in such a manner that a first input terminal of the OTA 1 is...
5793251 Demodulator circuit using gyrator circuit  
A demodulator circuit includes a gyrator circuit forming a derived equivalent inductance which is used in a demodulating circuit. The gyrator circuit has a first operational transconductance...
5635880 CMOS microwave multiphase voltage controlled oscillator  
A microwave differential amplifier comprises a first and a second matched NMOS device, each connected with the source to a common bias node, the gate to an input port for receiving a differential...
5371801 Energy absorption apparatus  
Apparatus for absorbing acoustic energy directed toward a wall. The appars includes a piezoelectric layer intermediate the wall and the source of the acoustic energy. Circuitry attached to the...
5343170 Voltage controlled oscillator provided with negative feedback biasing  
A voltage controlled oscillator (VCO) including a negative feedback circuit operates in response to a negative feedback signal generated during active transistor region operation of transistors in...
5267027 Comb filter-type Y/C separator circuit  
A Y/C separation circuit includes a glass delay line for delaying an input composite video signal. A luminance signal and a chrominance signal are separated from each other by an adding circuit and...
5263192 Integrated resonant circuit with temperature compensated quality factor  
A filter (13) for providing temperature compensation for the quality factor thereof comprises transconductance amplifiers (23 and 24) in a gyrator configuration coupled between an input node (21)...
5256991 Broadband microwave active inductor circuit  
A broadband microwave active inductor circuit for producing a flat inductive response versus frequency comprises a pair of bipolar transistors arranged in a gyrator configuration for producing an...
5243431 Audio bandpass filter adaptive to differing television standards  
A filter equipment comprises a plurality of filters, which are connected in cascade or in parallel. Characteristics of each filter are controlled according to an applied current. Desired...
5235223 Constant Q peaking filter utilizing synthetic inductor and simulated capacitor  
A tunable circuit is disclosed which allows tuning while maintaining a constant Q. The filter uses a synthetic inductor and a capacitance multiplier in place of discrete inductive and capacitive...
5202655 Microwave active filter circuit using pseudo gyrator  
A low pass filter using two pseudo gyrators 10 and 20 is disclosed. The gate-source capacitances of field effect transistors forming the pseudo gyrator circuit can be considered to be included in...
5144287 Current level sensing circuit for use with gyrator circuitry  
In a current level sensing circuit employing a gyrator to control an opto-isolator, a coupling circuit having an input impedance of a magnitude sufficiently higher than the output impedance of the...
5093642 Solid state mutually coupled inductor  
An electrical circuit (200) comprises a first circuit (208) constructed and arranged to simulate an inductor and a second circuit (210) constructed and arranged to simulate an inductor. Coupled to...
4952891 Filter circuit with automatic tuning  
A filter circuit (2) is automatically tuned so that the positions of the poles and zeros of its frequency response characteristic are maintained in substantially fixed ratios to an input frequency...
4947141 Oscillator network for radio receiver  
A sinewave oscillator and a quadrature phase shift network fabricated as an integrated circuit for a Barber radio receiver comprising, in order that the network and oscillator be simply adjustable...
4812785 Gyrator circuit simulating an inductance and use thereof as a filter or oscillator  
A gyrator circuit usable in a resonant filter circuit comprises a first and a second transconductance amplifier circuit, A and B, respectively, having opposite conductances, which amplifiers are...
4760353 Integrated gyrator oscillator  
An oscillator is disclosed comprising a pair of gm stages wherein the output of the second gm stage is coupled to the inverting input of the first stage and the output of the latter is coupled to...
4592069 Line powered modem  
A modem or other data handling apparatus for connection to a transmission line includes an inductance simulation circuit for providing a low d.c. resistance to allow circulation of a line holding...
4565962 Gyrator  
A gyrator is comprised of a first voltage-current converter for converting the first voltage applied to a first terminal into electric current, a first light-emitting diode for converting the...
4485356 Variable low frequency sinusoidal oscillator using simulated inductance  
A low frequency sinusoidal oscillator, comprises a circuit which contains operational amplifiers, resistors and capacitors and has no inductor. The circuit, however, operates as an inductor. The...
4381489 Pass filter circuit arrangement  
In order to facilitate its construction as in integrated circuit, the inductive elements of two resonant circuits in a band-pass filter are each constituted by a first port of a respective gyrator...
4349797 Phase-compensated integrated circuit  
Compensation for an effect produced by variations in the base-widths of integrated circuit transistors occurring from batch to batch is obtained by including in each integrated circuit a resistor...
4338582 Electronically tunable resonator circuit  
An electronically adjustable capacitor (varactor), an active element such as a Field Effect Transistor arranged to exhibit negative resistance, and an inductor are arranged as a frequency tunable...
4290036 Filter circuit arrangement  
In a filter circuit a reactance is simulated by a voltage amplifier the input of which is connected across a reactive element and the output of which is connected in series with that element,...
4272735 Single amplifier variable gyrator  
The subject gyrator circuit is realized by a single amplifier and six resistors, which resistors are selected to satisfy a single equation. This permits great flexibility in setting the Z 12 and Z...
4245202 Floating gyrator having a current cancellation circuit  
A network simulating an ungrounded inductor includes an active gyrator circuit which employs an operational amplifier, said gyrator being a two port device having an ungrounded port, and a grounded...
4217562 Equalizer networks providing a bump shaped response  
An equalizer network that exhibits stability and may be cascaded with a transmission channel is disclosed. The network includes only two operational amplifiers, resistors and capacitors and...
4193033 Quadrature transposition stage  
Quadrature transposition stage has two signal channels, each containing a filter. A gyrator circuit is coupled between the filters. The result is that the two filters have exactly the same transfer...
4100515 Communication circuit having precision capacitor multiplier  
A precision capacitor multiplier connected in a communication circuit for balancing transmission facility impedances. The circuit requires only a single precision capacitor, and utilizes a...
4074215 Stable gyrator network for simularity inductance  
An unconditionally stable gyrator circuit includes two interconnected d.c. differential amplifiers. The terminals of an input port are respectively connected to the non-inverting inputs of the...
Matches 1 - 50 out of 102 1 2 3 >