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3979693 |
Crystal-controlled oscillator having sinusoidal and square-wave output signals
A precision crystal-controlled oscillator circuit with provision for separate sinusoidal and square-wave output signals which can be realized as a silicon integrated circuit without the use of...
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3978650 |
Electric timepiece
An electronic timepiece which includes a time reference signal generator, which generates a signal which is used to count time, and is compensated in its frequency in order to have the...
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3974460 |
High frequency modulator, such as an amplitude modulator, including a frequency multiplier
A high-frequency modulator circuit including a frequency multiplier comprised of a first differential amplifier for receiving a base oscillating signal and for multiplying the frequency of the base...
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3973221 |
Voltage controlled crystal oscillator apparatus
A voltage controlled crystal oscillator is disclosed suitable to be included in a subcarrier regeneration stage for a color television receiver. The oscillator includes a novel phase shifting...
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3969640 |
Microresonator packaging and tuning
A piezoelectric tuning fork microresonator advantageously is mounted in a package having a transparent region through which the microresonator can be tuned using a laser beam selectively to remove...
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3967143 |
Ultrasonic wave generator
The ultrasonic wave generator of the present invention always drives a transducer with the resonant frequency f o of the transducer. Although the resonant frequency f o changes due to the...
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3962860 |
Quartz crystal timepiece
A quartz crystal timepiece incorporating a vibrator unit is disclosed. The vibrator unit is hermetically sealed in a case on which a condenser is fixed and the condenser compensates the oscillating...
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3961284 |
Oscillator control circuit
Disclosed is a circuit for locking a harmonic-rich oscillator, such as the crystal-controlled type, to provide as its output, a signal at a designated frequency characterized by minimum harmonic...
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3958187 |
Clock signal generating device with complementary MOS transistors
Disclosed is a clock signal generating integrated circuit device comprising a quartz crystal oscillator section and a multistage frequency divider section. The crystal oscillator section and each...
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3956880 |
Solid state wristwatch with charge coupled divider
This invention relates to a solid state timepiece and more particularly to an electronic watch which employs no moving parts. In the present invention a frequency standard in the form of a crystal...
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3958190 |
Low harmonic crystal oscillator
A colpitts oscillator having a tank circuit and a common base connected transistor, operating in a linear range, with an emitter-base junction coupled in the tank circuit and a load in the...
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3939644 |
Circuit arrangement for controlling the running of a quartz-controlled electric clock
A circuit arrangement for an electric clock comprises an oscillator stage, frequency divider stages, pulse shaper stages and two output stages for controlling the drive, switch means being provided...
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3938080 |
System for the programmed flashing of warning lights
A system for the programmed flashing of a plurality of highway warning lights includes a plurality of slave receivers each associated with a warning light to be mounted on respective barricades...
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3932816 |
Multifrequency drive clock
Apparatus for selectively producing at a single output terminal one of a plurality of pulse repetition frequencies (PRF) in response to a set of control signals. After decoding the control signals,...
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3921094 |
Phase-locked frequency synthesizer with means for restoring stability
A cellular type high capacity mobile communication system requires a large number of channels for use on a selective basis within each of several small cells. In the system described, switching...
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3916345 |
VHF NAND gate crystal oscillator
A circuit that provides the active-bias of and the phase selection of a higher overtone frequency of a crystal oscillator is disclosed. The circuit includes two transistor-transistor-logic (TTL)...
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3916344 |
Direct FM modulated high frequency oscillator having selectively controllable frequency deviation sensitivity
A high frequency, direct frequency modulated oscillator circuit suitable for use in two-way communications systems or the like. The oscillator includes first and second resonant frequency tuned...
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3911378 |
TTL gate voltage controlled crystal oscillator
A voltage controlled crystal oscillator employing three series-connected TTL inverting gates. Two resistor and capacitor time constant circuits are connected in circuit with one TTL inverting gate...
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3899747 |
Arrangement for providing radio equipment with a plurality of oscillators
Radio equipment, such as a mobile transmitter and receiver, may require or use a fairly large number of frequencies, some of which may have a relatively low frequency stability and some of which...
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3899753 |
Controlled high frequency transistor crystal oscillator
A series-resonant crystal provides ac emitter coupling for a current switch whose output is fed back to its input to sustain oscillations at the resonant frequency of the crystal. A mixer circuit...
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3890612 |
High output audible alarm device utilizing a piezoelectric transducer
An audible alarm device comprises solid-state amplifier drive circuit cooperating with a piezoelectric transducer to convert electrical energy into sound energy. An acoustical loading means, such...
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3887881 |
Low voltage CMOS amplifier
A low voltage CMOS amplifier, particularly adaptable for use with an oscillator in an electronic watch. The relatively large biasing resistor used in prior art CMOS amplifiers is eliminated and...
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3882422 |
LC and crystal transistor oscillators
The embodiment of the invention disclosed herein is directed primarily to structural improvements in oscillator circuits which can be used in the field of power conversion. The oscillator circuit...
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3878481 |
Low noise VHF oscillator with circuit matching transistors
A VHF oscillator circuit is disclosed providing a higher stable gain than achieved with prior art designs. In particular, there is disclosed first and second transistors, a first resonant circuit...
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3878408 |
Quartz crystal timepiece having tuning capacitor device
The oscillator circuit of a quartz crystal timepiece is provided with a tuning capacitor device consisting of a stepped variable capacitor and a continuously variable capacitor connected in...
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3875553 |
Directional detection system
A directional detection system including a microphone assembly comprising omnidirectional microphone and two orthogonal directional microphones. The omnidirectional microphone signal is connected...
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3875533 |
Crystal controlled overtone oscillator having a rejection circuit for preventing oscillation at undesired overtones
A crystal controlled overtone oscillator having a feedback circuit comprising a series connected inductance-capacitance arm having the values of the inductance and capacitance chosen to provide a...
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3855549 |
CIRCUIT, SUCH AS CMOS CRYSTAL OSCILLATOR, WITH REDUCED POWER CONSUMPTION
A complementary symmetry, metal oxide semiconductor device (COS/MOS) oscillator which includes a COS/MOS inverter and a regenerative feedback path from the output to the input terminal of the...
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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...
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3848200 |
ASSEMBLY COMPRISING A QUARTZ OSCILLATOR DELIVERING TWO-PHASE PERIODIC SIGNALS AND A DIVIDER FOR THE FREQUENCY OF SAID SIGNALS
An assembly comprising a quartz oscillator which delivers two-phase periodic signals and a divider for the frequency of said signals.
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3845410 |
CRYSTAL OSCILLATOR HAVING SPURIOUS OSCILLATION SUPPRESSION CIRCUIT
A frequency modulated crystal controlled overtone oscillator including a resistance-inductance network for minimizing spurious responses. The resistance shunts a low impedance point, thereby...
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3838566 |
SOLID STATE WATCH HAVING COARSE AND FINE TUNING
Disclosed is a solid state electronic wristwatch having an electro-optical display in the form of light-emitting diodes. The display is energized from a high frequency quartz crystal oscillator by...
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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...
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3838564 |
OSCILLATOR
An electronic timekeeping device includes bipolar integrated circuit implemented logic in combination with a liquid crystal display. A crystal controlled oscillator provides the system clock signal...
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3838357 |
APPARATUS FOR USING START-UP OF A CRYSTAL OSCILLATOR TO SYNCHRONIZE POWER TURN-ON IN VARIOUS PORTIONS OF A SYSTEM
A pair of timing circuits, a pair of flip-flops, a crystal oscillator and a logic circuit provide a first group of signals while oscillations are building up and a second group of signals after...
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3836873 |
LOW NOISE VHF CRYSTAL HARMONIC OSCILLATOR
A two transistor VHF crystal controlled harmonic oscillator provides a large ratio of output power to crystal unit power dissipation without significant degradation of oscillating resonator Q from...
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3832653 |
LOW NOISE RF SIGNAL GENERATOR
A signal generator for generating a high power low noise RF signal is disclosed. The generator includes a low noise crystal control oscillator for generating a relatively low power, low noise RF...
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3829790 |
CLOCK DISTRIBUTION CIRCUIT
A clock distribution circuit that generates consecutive timing pulses of a first predetermined time duration on a first plurality of output lines and a corresponding number of timing pulses of a...
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3823546 |
CRYSTAL-CONTROLLED DIGITAL CLOCK
A clock with coaxial digit wheels for one-minute, ten-minute and hour indications has a drive motor intermittently energized by an electronic switch constituting the final stage of a 20-stage...
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3824495 |
CRYSTAL OSCILLATOR, ESPECIALLY FOR CLOCKS AND WATCHES
A crystal oscillator arrangement, especially for clocks and watches, in which an oscillator circuit has an input terminal connected to one side of a crystal while between the output side of the...
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3824486 |
SOLID STATE SWITCHING CIRCUIT EMPLOYING A SELECTIVELY DAMPED PIEZOELECTRIC RESONATOR TO CONTROL A THYRISTOR CIRCUIT
A compact and relatively economical high speed solid state switching circuit wherein a thyristor is controlled by an oscillator employing a selectively damped piezoelectric resonator, the...
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3824491 |
TRANSISTOR CRYSTAL OSCILLATOR WITH AUTOMATIC GAIN CONTROL
A crystal controlled oscillator operable over a wide frequency range includes an emitter coupled oscillator and automatic gain control to maintain the amplitude of the oscillations within a...
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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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3817020 |
ELECTRONIC DIGITAL CLOCK
A pulse signal having a constant period shorter than that of a quick feed signal and signals transmitted through the actuation of a quick feed switch are used to trigger flipflops and the flipflops...
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3813616 |
ELECTROMECHANICAL OSCILLATOR
An electromechanical oscillator comprises an electronic amplifier driving an electromechanical transducer which includes a pair of like transducer units affixed to a bar having with the transducers...
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3810355 |
ELECTRONIC CIRCUIT FOR QUARTZ CRYSTAL WATCH
A watch movement constructed as an electronic circuit provided with an oscillating circuit having a quartz oscillator or resonator and a capacitor roughly adjusting the frequency of the oscillator...
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3808556 |
VARIABLE CAPACITOR, ESPECIALLY FOR TEMPERATURE-COMPENSATED ELECTRONIC TIMEPIECE
An electronic watch or other timepiece has a clockwork driven by an electronic oscillator having a quartz crystal. A variable trimmer condenser is connected in parallel with this crystal for...
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3806831 |
ULTRA-STABLE OSCILLATOR WITH COMPLEMENTARY TRANSISTORS
A high frequency oscillator, having both good short and long term stability, is formed by including a piezoelectric crystal in the base circuit of a first bi-polar transistor circuit, the bi-polar...
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3806635 |
MULTIPLEX COLOR TELEVISION DEMODULATOR
A color television demodulator is disclosed for processing the NTSC color signal. The video signal is converted to base band and two color difference components are derived in two four-quadrant...
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3803828 |
RESISTOR TRIM FOR QUARTZ OSCILLATOR
This invention relates to a trimming arrangement for a quartz oscillator particularly suited for use in highly accurate quartz watches, wherein the oscillator output frequency is adjusted to a...
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