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7598820 Magnetic drive for high and low temperature mechanical oscillators used in sensor applications  
A magnetic drive and mechanical oscillator system comprising a mechanical oscillator, a coil, a means for providing alternating current to said coil thereby creating a magnetic field within and...
7315220 Voltage controlled oscillator  
A voltage controlled oscillator (VCO) having a single stage ring-oscillator having both coarse and fine control of the frequency of oscillation is described. In an embodiment the VCO may include a...
7119627 Phase-locked loop circuit as well as a voltage-controlled oscillator as used in a phase-locked loop circuit  
A phase-locked loop circuit comprises a voltage-controlled oscillator with at least one resonator circuit for driving the oscillator to an output frequency which is a multiple of the resonator...
6611148 Apparatus for the high voltage testing of insulated conductors and oscillator circuit for use with same  
An insulation tester and oscillator circuit for use in same includes a transformer including a primary winding and at least one secondary winding to be coupled across an external load such as an...
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...
6297707 Microwave oscillator with dielectric resonator  
A microwave oscillator includes at least two active components and a dielectric resonator. The coupling between each active component and the dielectric resonator is of the transmission type and...
6275118 Push-push oscillator  
A push--push oscillator is formed by (a) a resonator circuit including a transmission line having one-half wavelength and both ends of the line being left open, and a capacitance for frequency...
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...
5859572 Oscillator and transmitter arrangement for power specific applications having parasitic impedances  
A transmitter system for transmitting an output signal having an output level and a signal to noise ratio. The transmitter system comprises a balanced oscillator comprised of a resonator for...
5754012 Primary side lamp current sensing for minature cold cathode fluorescent lamp system  
A circuit for sensing a current in a fluorescent lamp. A control system comprises a buck regulator circuit for supplying a buck current, an inverter circuit for receiving the buck current and for...
5699021 Balanced and buffered oscillator and transmitter arrangement  
A balanced and buffered oscillator and transmitter arrangement includes a first and second oscillator, each of which include a resonator for generating a reference signal, an amplifier for...
5602515 High-frequency generator with harmonic-tuned resonant circuits  
In order to improve the efficiency of a self-starting high-frequency generator, where for self-starting power is fed back from the anode circuit to the control grid of the grid-controlled electron...
5568095 Balanced oscillator and transmitter arrangement  
The present invention teaches an oscillator and transmitter. The balanced oscillator comprises a resonator for generating a reference signal having a resonating frequency, a first oscillator for...
5486793 Balanced RF oscillator and transmitter  
A balanced oscillator and transmitter circuit is provided which includes a pair of balanced Colpitts-type oscillators for generating an enhanced power radiating output signal. The balanced...
5422605 Low-noise push-pull crystal oscillator  
A low phase noise oscillator 10 having a balanced feedback transformer 24 and a push-pull resonant circuit 12 for generating an oscillation excitation signal. The resonant circuit 12 is loaded by...
5402087 Voltage controlled push-push oscillator  
A voltage controlled push-push oscillator is provided having a variable frequency output over a range of frequencies. Usually, the range of frequencies is in the microwave range. The configuration...
5309350 Push-pull inverter  
Here is disclosed a push-pull inverter used to drive a cold cathode discharge tube, a hot cathode discharge tube and the like, comprising a boosting transformer having a first primary coil, a first...
5289139 Push-push ring resonator oscillator  
A push-push microwave oscillator has two branch oscillators fabricated of a transistor and transmission line elements extending from terminals of the transistor, and a resonator which is fabricated...
5250910 Push-push oscillator having in-phase and anti-phase output combining circuits  
A push-push oscillator including a resonator having a transmission line and a capacitance connected to the transmission line in parallel; an oscillating circuit responsive to the resonator for...
5109328 Push-pull inverter employing current feedback  
This invention relates to a push-pull inverter used, for example, as a driver for cold-cathod discharge tube, hot-cathode discharge tube, etc. According to this invention, respective control...
4996499 Amplitude stabilized oscillator amplifier  
An inverting amplifier useful in an oscillator circuit includes complementary serially connected first and second metal-oxide-semiconductor field effort transistor (MOSFETS) and first and second...
4947139 Very low input power oscillator with improved amplitude stability  
An improved control circuit for maintaining constant amplitude of the sinusoidal output signal of an oscillator circuit by synchronously demodulating the signal using a push-pull transistor pair...
4818953 Oscillator improvement  
An improved oscillator circuit for avoiding core saturation without the need for auxiliary magnetic devices employs an emitter resistance for regulating base voltage, and a semiconductor base shunt...
4763084 Push-push dielectric resonator oscillator  
A push-push broadband dielectric resonator oscillator circuit that operates in the K and Ka band frequency range has two oscillator circuits that oscillate at the same fundamental frequency. An...
4704561 Push-pull generator  
A push-pull generator with a driver stage and a push-pull output stage. A parallel connection of a resistor (R3, R4) with a control transistor (T3, T4) is provided in the base line of each output...
4704585 Rapid frequency synthesizer apparatus and method  
Rapid frequency synthesizer apparatus, particularly for use in high speed frequency hooping systems, includes a voltage controlled oscillator (VCO) and a memory in which are stored digital control...
4532439 Mosfet logical circuit with increased noise margin  
A logic circuit comprises a first and second circuit. The first circuit consists of at least one first conductivity-type MOSFET having a gate connected to an input terminal, and having a first...
4527130 Push-pull microwave oscillator with fundamental and second harmonic outputs  
A push-pull microwave oscillator circuit, including two transistors, for producing the second harmonic of a fundamental frequency at a symmetry point of the circuit which is connected to the bases...
4513226 Electronic ballast-inverter circuit  
An electronic ballast-inverter circuit for powering one or more fluorescent lamps or the like includes two identical circuits operating at different DC offsets, each circuit including a tank...
4453269 Apparatus for improving the frequency stability of a transmitter oscillator circuit  
A novel apparatus and method for improving the stability of an electrical circuit such as an oscillator and/or a radio frequency transmitter which is coupled to a radiating element wherein the...
4434457 Nonsaturating electronic ballast for gas discharge tubes  
A solid-state power generator or inverter for operating a load such as one or more gas discharge lamps from a DC or rectified AC power source includes two principal circuits, one being a drive...
4360790 Varactor controlled push-pull oscillator  
An oscillator arrangement is disclosed which is controllable in its frequency and which comprises a control input for frequency variation and a transformer output, whose frequency-determining...
4336509 Oscillation generator for an ultrasonic liquid atomizer  
The oscillation generator includes an oscillator circuit, a push-pull amplifier with inductive positive feedback connected in the circuit, a piezoceramic atomizer vibrator element, and a...
4277726 Solid-state ballast for rapid-start type fluorescent lamps  
A novel transistorized fluorescent lamp ballast and lamp combination operates from AC line voltage. The ballast provides for "soft-start" lamp operation in one featured aspect and provides for some...
4258337 Stabilized output power oscillator  
The oscillator includes a high gain differential amplifier, the output of which alternately drives two sets of transistors which together provide the oscillator output signal. A first set of...
4211985 Crystal oscillator using a class B complementary MIS amplifier  
In oscillators such as those used in electronic watches, low power consumption is quite desirable. To accomplish this, an oscillator is provided including a complementary inverter amplifier circuit...
4169248 Oscillating circuit  
An oscillating circuit provides first and second reference signals having a phase difference of 90° with respect to each other. The oscillating circuit includes an oscillator providing the first...
4163177 Oscillation generator providing oscillations of varying amplitude  
An oscillation generator providing a succession of oscillations repetitively and progressively varying in amplitude includes a feedback oscillator arranged to receive its operating voltage from a...
4156210 Resonant transformer push-pull transistor oscillator  
The specification discloses a regulated temperature compensated current source in combination with a self resonant oscillator. The current source receives an unregulated DC voltage and compensates...
4149234 Inverter arrangements  
This invention provides an inverter circuit in which an output transformer has a tapped primary winding, one portion of which provides a collector load for a first transistor and the other portion...
4128800 Vehicular battery charging system  
A vehicular battery charging system particularly adapted for railroad cars such as cabooses, in which an axle drive/hydraulic pump unit is coupled to the end of an axle via a flexible coupling and...
4065728 Crystal oscillator including a pair of push-pull complementary transistor amplifiers  
An improved integrated circuit oscillator adapted for crystal-controlled applications eliminates the need for capacitors and duty cycle control circuitry by using a cascaded pair of push-pull...
4035745 Circuit for the production of an open alternating magnetic field  
In an induction energy transfer device comprising a static power conversion circuit for producing an alternating magnetic field of ultrasonic frequency of the type wherein the static power...
4003004 Frequency modulated oscillator  
A frequency modulated push-pull oscillator in which the non-linear characteristic of varactors producing frequency modulation is compensated for by an opposite non-linear characteristic of a field...
3939429 Tunable high frequency input circuit for a television receiver that tunes both VHF and UHF channels and can be readily integrated  
The IC television tuner has a tunable oscillator and a fixed oscillator, two mixer stages and a filter in between. This tuner operates at two intermediate frequencies the first of which lies in the...
3855552 OSCILLATOR UTILIZING COMPLEMENTARY TRANSISTORS IN A PUSH-PULL CIRCUIT  
An oscillator constructed using complementary transistors in a push-pull configuration employs means to vary at least one base voltage divider resistor to adjust the working points of the...
3839685 SINGLE-STAGE BALANCED OSCILLATOR/FREQUENCY MULTIPLIER  
A push-pull oscillator circuit is frequency-stabilized with a resonant component in a common unbalanced portion of the feedback loops which receives from at least one shunt branch of the circuit an...
3763444 AMPLITUDE STABILIZED OSCILLATOR CIRCUIT  
An amplitude stabilized oscillator circuit comprising an oscillator having first and second inputs, an output, a positive feedback path between the output and the first input, and a negative...
3735287 RF/DC GENERATOR FOR QUADRUPOLE MASS ANALYZER  
The specification discloses an improved radio frequency-direct current (RF/DC) generating circuit for use with a quadrupole mass analyzer. A free-running oscillator is employed to generate the...
Matches 1 - 50 out of 111 1 2 3 >