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8035462 Resonant circuit, method of producing same, and electronic device  
A resonant circuit includes a substrate; a MEMS resonator including a fixed electrode and a movable electrode formed above the substrate and having a first terminal and a second terminal, the...
7554416 Multi-band LC resonance voltage-controlled oscillator with adjustable negative resistance cell  
Provided is an LC resonance voltage-controlled oscillator (VCO) used for a multi-band multi-mode wireless transceiver. In order to generate a multi-band frequency, a capacitor bank and a switchable...
7492230 Method and apparatus for effecting high-frequency amplification or oscillation  
An apparatus includes a distributed resonant tunneling section with a plurality of inductive portions that are coupled in series with each other between first and second nodes, such that a...
7283008 Oscillator circuit with temperature compensation function  
An oscillator circuit comprising a resonant circuit which includes a negative resistor, an inductor and an oscillation frequency setting capacitor whose capacitance is varied according to a control...
7221920 Voltage controlled oscillator, frequency synthesizer and communication apparatus  
A voltage controlled oscillator includes a resonator configured to resonate with an initial oscillation frequency during starting period of oscillation and a steady oscillation frequency during a...
7061333 Slot line based high frequency oscillator using two-port element  
A high frequency oscillator has a substrate, a resonator circuit which is disposed on one principal surface of the substrate and consists of a closed loop-shaped slot line including an inner...
6933793 Method of overtone selection and level control in an integrated circuit CMOS negative resistance oscillator to achieve low jitter  
A stable high-frequency clock pulse apparatus and method including frequency source, overtone crystal unit coupled with a negative resistance oscillator, a bandpass overtone filter and a drive...
6650195 Oscillator with differential tunable tank circuit  
Many electronic devices, such as computers and printers, communicate data to each other over wireline or wireless communications links. One component vital to such communications is a...
6621331 Variable negative resistance cell for bipolar integrated circuits  
An effective means and apparatus for generating a negative resistance including a circuit element that exhibits an increase in current as the applied voltage is decreased. Other embodiments of the...
6512422 Oscillator with improved magnetic coupling rejection  
The present invention provides an oscillator such as a voltage controlled oscillator (VCO) that can supply more stable frequency signals in the presence of strong magnetic coupling caused by...
6429748 Oscillation circuits featuring coaxial resonators  
There is a manufacturing limit on how small ceramic coaxial resonators can be produced, which leads to a limit on the frequency of resonance for these resonators. One technique to double the...
6326854 Coaxial resonator and oscillation circuits featuring coaxial resonators  
There is a manufacturing limit on how small ceramic coaxial resonators can be produced, which leads to a limit on the frequency of resonance for these resonators. One technique to double the...
6323737 System and method for generating a multi-phase signal with a ring oscillator  
An oscillator is provided that includes a plurality of bridges and a plurality of transmission lines. Each bridge includes a plurality of negative differential resistance devices. Each transmission...
6288617 System and method for phase-locking a bridge with an optical pulse  
A phase-locking system is provided that includes a bridge, a light source and an optical pulse injector. The bridge includes a plurality of negative differential resistance devices for storing an...
6169461 High-frequency oscillating circuit  
A high-frequency oscillating circuit that is not degraded by external electromagnetic interference. The high-frequency oscillating circuit includes first and second oscillating transistors wherein...
6114930 Impedance controlled by the phase angle between two signals  
An impedance device has a first conductor and a second conductor, the first and second conductors being positioned in relation to each other so as to provide magnetic coupling between them. The...
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...
6008701 Quadrature oscillator using inherent nonlinearities of impedance cells to limit amplitude  
A quadrature oscillator based on two cross-coupled gm/C cells utilizes the inherent nonlinearity of positive and negative impedance cells to control the amplitude of oscillation, thereby...
5959504 Voltage controlled oscillator (VCO) CMOS circuit  
A voltage controlled oscillator (VCO) CMOS circuit wherein back gate terminals of CMOS transistors are used to vary the parasitic capacitances of the transistors. The back gate terminals receive a...
5942952 VCO with multiple negative differential resistance devices  
A VCO includes a transistor having a plurality of negative differential resistance devices coupled in series to the source terminal of the transistor, with each of the devices having a negative...
5920236 Oscillator circuit having a power control element to initiate oscillation in a shortened time period  
An oscillator usable for a TDMA type wireless mobile communication device in which an average current at the communication terminal is decreased. The oscillator has a switching circuit or a timing...
5920235 Voltage controlled oscillator integrated circuit  
A voltage controlled oscillator has a cross-coupled negative resistance cell formed as an integrated circuit connected to off-chip components of a high-Q resonant tank circuit. To counteract...
5883549 Bipolar junction transistor (BJT)--resonant tunneling diode (RTD) oscillator circuit and method  
A BJT, an inductor, and an RTD are configured to define a negative resistance oscillator circuit that is suitable for monolithic integration. The BJT is forward biased so that the RTD operates at a...
5850163 Active inductor oscillator with wide frequency range  
An active inductor oscillator includes a tank circuit for generating a first differential signal, a common-mode inverting differential buffer for generating a second differential signal in response...
5821825 Optically controlled oscillator  
An optically controlled oscillator utilizes a HEMT or a PIN diode as a photodetector and either a HEMT or HBT as an active inductor. The optically controlled HEMT active inductor provides a means...
5821820 Dual band voltage controlled oscillator  
A voltage controlled oscillator operable on two widely separated frequency bands, such as 900 MHz and 1.8 GHz for example. The voltage controlled oscillator includes two negative resistance...
5740522 Method and apparatus for reducing receive band transmitter-chain noise for a portable duplex transceiver  
Reduction of transmitter exciter chain generated noise from the receive bank of a portable/hand-held duplex transceiver is achieved using a high output power, low-noise...
5714911 Quadrature oscillator having amplitude control means based on a trigonometric identity  
A quadrature oscillator includes an amplitude control circuit that is based upon the trigonometric identity sin2 ωt+cos2 ωt=1. The amplitude control circuit, referred to as a Pythagorator, i...
5708398 Dual voltage controlled oscillator using integrated transistor and negative differential resistance diode  
A dual voltage controlled oscillator including a transistor with a negative differential resistance diode coupled to a first terminal and an inductance coupled to a second terminal. Operating...
5635879 Voltage controlled oscillator formed of two differential transconductors  
A monolithic CMOS phase-lock loop (PLL) circuit provides a high frequency of operation suitable for RF applications. The PLL produces an output clock with high spectral purity and very low jitter....
5578970 BICMOS monolithic microwave oscillator using negative resistance cell  
A monolithic microwave oscillator using a negative resistance cell includes a resonator, a negative resistance cell that employs an active device, an output buffer for voltage and current...
5489878 Current-controlled quadrature oscillator based on differential gm /C cells  
An oscillator including two gm/C stages is disclosed. Each gm/C stage includes a differential pair of transistors, a capacitor, and a tunable current source. Alternatively, multi-tanh n-tuplets can...
5486794 Variable frequency LC oscillator using variable impedance and negative impedance circuits  
A variable frequency oscillator which can be implemented entirely in a semiconductor chip, which is variable over a broad frequency range and which has relatively low phase noise, includes a...
5479129 Variable propagation delay digital signal inverter  
An electronically-controlled variable propagation delay digital signal inverter comprises a digital signal inverter having an input signal port and an output signal port, and an...
5446419 Microwave oscillation apparatus capable of suppressing spurious oscillation  
In a microwave oscillation apparatus including a negative resistance element, a microstrip line having a first end connected to the negative resistance element and a second end connected to a...
5444422 Low phase noise high frequency integrated oscillator with minimum pins  
A low phase noise, high frequency low voltage integrated circuit oscillator has a minimum number of live pins. It includes a three transistor current mirror defining a voltage node and a current...
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...
5235293 Variable frequency microwave oscillator including digital phase shifter as tuning element  
A resonator (50) is connected in circuit with a negative resistance element (Q3,Q4) for producing oscillation at a resonant frequency of the resonator (50). A digital phase shifter (58) is...
5187451 Oscillator using microstrip line having minimized line width and length  
For minimization of a microstrip line and improvement of a Q value, the line length and width of the microstrip line are minimized, and the high frequency trend of the resulting resonant frequency...
5175513 Oscillator circuit employing inductive circuit formed of field effect transistors  
A cascode amplifier having a 180° phase characteristic is connected with in-phase feedback circuits having a 0° phase characteristics. When viewed from an output side of the cascode amplifier, t...
5089717 Intergrated semiconductor device including a frequency divider for microwave applications  
An integrated semiconductor device including a frequency divide-by-two circuit comprising an inverter stage and a switching transistor (T2) which is controlled by a microwave input signal (E). The...
4947138 Microwave oscillator devices  
In a microwave oscillator device, wires (1,2,3 etc) form inductors in a feedback path between a control electrode (e.g. gate) and a second main electrode (e.g. source) of a transistor (e.g. a GaAs...
4841353 Transistor devices for microwave oscillator elements  
A transistor device for a microwave oscillating element having an FET transistor chip and a package encapsulating the chip therein. In order to avoid any affection of the external circuit to the...
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...
4660001 Three-terminal negative admittance network  
Three-terminal negative admittance networks are disclosed. The preferred networks include either a bipolar junction transistor or a field-effect transistor phase shift mechanisms are used to...
4630003 FET oscillator exhibiting negative resistance due to high impedance at the source of an FET thereof  
An FET oscillator wherein a bias circuit is connected to a drain of a field-effect transistor and a source circuit including a transmission line and a self-bias circuit is connected to a source of...
4621239 Gallium arsenide travelling-wave transistor oscillators for millimeter wave applications  
The disclosure relates to a gallium arsenide travelling-wave transistor oscillator which extends the oscillation frequency of the individual FETs by connecting them in parallel across a pair of...
4518930 Negative resistance circuit for VCO  
A high-frequency negative resistance circuit for use in a voltage controlled crystal oscillator has a pair of input terminals thereby defining an input current and input voltage. The high-frequency...
4507622 Oscillator utilizing inductive parameter of transistor  
An oscillator having sufficient accuracy and precision for use in aircraft microwave-landing systems is constructed without the use of an external inductor. A resonant tank circuit comprising both...
4491807 FET Negative resistance circuits  
FET circuitry is described which may be substituted for a programmable unijunction transistor particularly on CMOS-FET integrated circuits. The FET circuitry is arranged between first and second...
Matches 1 - 50 out of 141 1 2 3 >