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5225793 |
Voltage-controlled oscillator system
A ceramic resonator, a variable reactance circuit, and a limiter circuit are connected to the output of an amplifier having an output that is fed back to the positive phase-sequence input, and the...
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5191301 |
Integrated differential voltage controlled ring oscillator
A highly stable, high frequency voltage controlled oscillator (VCO) for phase locked loops is adapted to be fully integrated on a single silicon chip and is operable over a wide frequency range...
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5162757 |
Low voltage oscillator with separate startup mode
A low-power crystal-controlled CMOS oscillator wherein a long and wide additional transistor is provided in the first stage of the output amplifier. This prevents the output amplifier from...
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5157356 |
Monolithic microwave integrated circuit voltage controlled harmonic oscillator with isolation amplifiers
A microwave voltage controlled oscillator (12) and isolation amplifiers (14, 16) are formed as a monolithic circuit on a single GaAs substrate. Only a single external inductor (34) is required to...
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5150079 |
Two-mode oscillator
A low-power crystal-controlled CMOS oscillator wherein a long and wide additional transistor is provided in the first stage of the output amplifier. This prevents the output amplifier from...
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5136264 |
Transmitter including an FSK modulator having a switched capacitor
A transmitter including a continuous phase FSK modulator is disclosed for use primarily in optical transmission. The output frequencies are achieved by switching a capacitor into and out of an...
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5113153 |
High-frequency monolithic oscillator structure for third-overtone crystals
A crystal oscillator circuit wherein first and second transistors are connected to form a differential pair. The second transistor functions as an inverting gain stage for the oscillator and two...
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5113156 |
Low power crystal oscillator with automatic gain control
A crystal oscillator uses automatic gain control to minimize the operating current through its inverting amplifier. The power supply potential to switching transistors of the amplifier is reduced...
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5066929 |
Circuit for producing four indications on a bicolor light emitting diode having two leads
A circuit for producing four indications on a bicolor light emitting diode (LED) includes a ring oscillator, with two inputs controlling inverters of opposite phase. By enabling or disabling these...
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5053727 |
Circuit coupling an oscillator to an electrical load
A circuit comprising an oscillator having a load coupled thereto by means of at least one voltage-dependent coupling element that exhibits a high impedance at relatively low voltages and low...
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5025229 |
Voltage-controlled oscillator using a surface elastic wave resonator
A Colpitts oscillator has an integrated circuit. The integrated circuit includes a transistor having an equivalent large size, a bypass capacitor connected between a collector of the transistor and...
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5017890 |
Phase-controllable oscillator
A phase-controllable oscillator consists of a capacitance and an apparatus for charging and an apparatus for discharging the capacitance. In addition, feedback is provided for activating the...
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5010308 |
Crystal oscillator with offset and hysteresis
An oscillator is provided with an internal, high gain hysteresis effect so as to offset the linear regions of the waveform and to avoid spikes upsetting the count of a reference divider controlling...
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4990847 |
Microcomputer
The voltage of a CPU operation power source is stepped down by a regulator to a voltage for causing oscillation of an oscillator. The output voltage of the oscillator is stepped up by a level shifter.
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4864255 |
Oscillator capable of quickly supplying a stable oscillation signal
An oscillator has an oscillating circuit including a NOT circuit having first and second inputs and one output and is placed into an operable condition in response to a trigger signal applied to...
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4825178 |
Oscillator with noise rejection and square wave output
An oscillator with noise rejection which may be used in a gate array in a semiconductor chip including a first amplifier circuit, a circuit, for connecting an external feedback element (crystal)...
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4683446 |
PRF coherent, pulsed oscillator apparatus
Phase locked, pulsed oscillator apparatus, for example, for radar use, comprises a pulsed r.f. oscillator, a pulse repetition frequency (PRF) generator and a pulse shaping network. The PRF...
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4549818 |
Temperature detector
A temperature detector made by a CMOS integrated circuit. The temperature detector comprises a first constant voltage circuit for producing a first constant voltage, a second constant voltage...
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4484107 |
Discharge lamp lighting device and system
In a discharge lamp lighting system comprising a DC or low frequency (LF) AC main source and a high frequency (HF) source, a high frequency component from the HF source and low frequency component...
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4323861 |
Oscillator circuit for controlling the power level of a microwave oven
An oscillator circuit having a variable duty cycle for controlling the power level of a microwave oven provides an adjustable RC time constant circuit including a capacitance branch and a...
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4259715 |
Voltage conversion system for electronic timepiece
A voltage conversion system for an electronic timepiece having a power source as a lithium battery, which system generates power at lower voltage level than that of the power source for operating...
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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...
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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...
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3938059 |
Solid state rectifier control unit
A circuit for controlling the rectifier circuit in an electrostatic dust precipitator, the circuit being an oscillator circuit utilising a pair of alternately conducting transistors and a timing...
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3924253 |
Indicating system using pulsed optical techniques
A system for indicating the state of transparency of an optical path has: at one end of the path, a light pulse generator which includes a solid state means, such as a light-emitting diode, which...
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3898582 |
Transmitter encoder with output for a time period
A transmitter encoder is disclosed with the transmitter having a carrier frequency and a modulation frequency and the encoder influencing the modulated carrier at a third frequency rate. Typically...
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3893041 |
Oscillating power switching circuit for alternately energizing two lights
A pulse generating and power switching-circuit especially for high intensity warning lights alternately operated at timed intervals, and characterized by a pair of alternately conductive electronic...
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3873937 |
Tone burst generator
The present invention is a tone burst generator that provides periodic tone ursts or high frequency signals of a predetermined time duration at periodic intervals. The device includes a time...
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3828273 |
CONDITION-RESPONSIVE CONTROL CIRCUIT INCLUDING PULSE-ENERGIZED OSCILLATOR AND AMPLIFIER
A pulse-energized, DC-biased oscillator/amplifier which responds to the coupling of an external impedance comprising either a substantial capacitive or resistive component to the tank circuit of...
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3823378 |
TRANSMITTER SUBCODER
A transmitter subcoder is disclosed with the transmitter having a carrier frequency and a modulation frequency and the subcoder influencing the modulated carrier at a third frequency rate....
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3818367 |
ADJUSTABLE SLOW AND DELAYED PULSE OSCILLATOR
Apparatus for generating a first series of output pulses and a corresponding series of delayed output pulses, each delayed pulse being adjustably delayed with respect to the corresponding first...
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3805184 |
GATED ASTABLE MULTIVIBRATOR
A gain controlled differential amplifier and a feedback circuit connecting the output terminal of the amplifier to its gain control terminal. When the input signals to the amplifier differ in one...
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3778729 |
VARIABLE CAPACITANCE CONTROLLED TRANSISTOR MULTIVIBRATOR PULSE GENERATOR FOR ENGINE FUEL METERING SYSTEM
An internal combustion engine having an intake manifold has fuel supplied thereto by a fuel metering system which includes a variably positionable fuel metering valve positioned in accordance with...
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3775698 |
A CIRCUIT FOR GENERATING A HIGH POWER RF SIGNAL HAVING LOW AM AND FM NOISE COMPONENTS
An RF signal generator is disclosed which has low AM and FM noise and high power output. The output signal of the RF signal generator is a variable over an octave in response to a tuning voltage...
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3761833 |
AMPLITUDE STABILIZED L.C. OSCILLATOR WITH OUTPUT CIRCUITS FOR PRODUCING SEMI-SINUSOIDAL CLOCK PULSES
This self-oscillating clock driver circuit generates two half-sinusoidal, non-overlapping phases of output intended primarily for driving two-phase MOST circuits in a quick-step push-button dial...
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3714563 |
A TRANSISTOR INDICATOR CIRCUIT IN A METAL DETECTING APPARATUS
A metal detecting apparatus including an oscillator circuit, a switching circuit and an amplifying circuit, arranged to give a visual or other signal upon detection of a metal within a threshold...
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3688214 |
MEANS FOR GENERATING NARROW MICROWAVE PULSES
Described is a system for obtaining high power extremely short and narrow pulses in the neighborhood of nanoseconds, wherein the pulses are derived from longer pulses and more specifically by means...
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3684977 |
ADJUSTABLE FREQUENCY GENERATOR EQUIPMENTS
An adjustable frequency generator equipment having automatically controlled output level and low harmonic distortion comprises an adjustable R.F. oscillator, a variable bandwidth low pass filter, a...
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3665344 |
SELF-OSCILLATING VOLTAGE CONVERTER
A self-oscillating voltage converter including a pair of complementary transistors connected in single-ended push-pull configuration without the use of a transformer. The first transistor is...
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3665342 |
RESONANT CIRCUIT TRANSISTOR OSCILLATOR SYSTEM
An oscillator including a bias source which may be applied to a chip by integrated circuit techniques is disclosed. The oscillator has a tank circuit for determining frequency and has an automatic...
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3649929 |
SINUSOIDAL AND SQUARE WAVE OSCILLATOR WITH AUTOMATIC GAIN CONTROL
There is disclosed an integrated circuit which functions as a sinusoidal and square wave generator with a direct coupled automatic gain control to vary the current through the oscillator, so as to...
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3643162 |
TRANSMITTER PRODUCING IN RECURRENT CYCLES TIME-SPACED VARIED-POWER PROPAGATABLE PULSELIKE SIGNALS
A transmitter which, when energized, transmits in recurrent cycles multiple time-spaced pulselike signals, with different signals in a cycle having different maximum power levels.
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3631359 |
MULTIVIBRATOR DRIVEN REGENERATIVE TRANSISTOR DRIVE CIRCUIT FOR LAMP FLASHER
This is a solid-state lamp flasher operated from an oscillator using the combination of NPN-transistor and a PNP-transistor to drive the load and create regenerative action and another...
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3628183 |
LIMITER-STABILIZED OSCILLATOR
A high carrier-frequency semiconductor diode oscillator is frequency stabilized against variation in loading and amplitude modulation noise in its output is reduced by utilization of a...
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3618127 |
RADIATION-HARDENED PULSE-PRODUCING SYSTEM
A radiation-hardened pulse-producing system having an oscillator, a buffer amplifier and a saturable core transformer for producing output pulses. Current feedback loops from the output winding of...
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3614650 |
UNIJUNCTION TRANSISTOR RELAXATION OSCILLATOR WITH RAPID CAPACITOR DISCHARGE CIRCUIT
The shape of the output pulses from a unijunction transistor relaxation oscillator is improved by a circuit which rapidly discharges the capacitor of the oscillator. The discharge circuit is...
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3609578 |
OSCILLATOR HAVING FEEDBACK AMPLITUDE CONTROL AND SWITCHABLE OUTPUT PHASE SHIFTER
An oscillator circuit for providing a constant amplitude output tone includes a differential amplifier and a frequency-selective, feedback network. A regulating circuit is connected from an...
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3533010 |
AMPLITUDE REGULATED OSCILLATOR HIGH VOLTAGE SOURCE
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3469204 |
PROXIMITY SENSITIVE ON-OFF OSCILLATOR SWITCH CIRCUIT
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3462755 |
CAPACITY ALARM
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