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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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3649850 |
CRYSTAL-CONTROLLED SQUARE WAVE GENERATOR
A crystal, a wideband noninverting amplifier with low input and output impedance, a nonphase-shifting limiter circuit, a level shift and buffer output stage provide a square wave voltage output...
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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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3641461 |
TEMPERATURE COMPENSATED CRYSTAL OSCILLATOR
A crystal controlled oscillator is frequency sensitive to variations in crystal load capacitance in circuit with the crystal, to variations in temperature and to operation over extended periods of...
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3638223 |
OSCILLATOR MEANS FOR DRIVING A RESONANT LOAD
Improvements in sonic alerting devices of the type controlled by the natural frequency of the transducer are shown as well as improved circuits for driving loads in general. Efficient drive...
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3626329 |
CRYSTAL-CONTROLLED MULTIVIBRATOR OSCILLATOR
The frequency of a square wave transistor multivibrator oscillator is determined by a high-gain AC coupled quartz crystal feedback loop. Oscillator startup is provided by a DC coupled RC network...
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3617923 |
BEAT FREQUENCY GENERATOR USING TWO OSCILLATORS CONTROLLED BY A MULTIRESONATOR CRYSTAL
The unique properties of a monolithic crystal filter are turned to account in a low-frequency crystal oscillator system. Each of two different relatively high-frequency signals is generated by a...
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3614667 |
SWITCHABLE AND MODULATORY CRYSTAL OSCILLATOR
6. Apparatus for pulse modulating a crystal oscillator comprising: A transistor amplifier; A plurality of parallel feedback paths connected to said amplifier, each said feedback path including a...
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3614482 |
DC VOLTAGE INVERTER
A capacitor operating at a temperature-autostabilized state, having a pair of exciting electrodes and a ferroelectric dielectric arranged therebetween. An AC generator is connected between the...
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3614630 |
RADIO FREQUENCY STANDARD AND VOLTAGE CONTROLLED OSCILLATOR
A radio signal controlled oscillator is provided as a local frequency standard by synchronizing the oscillator using a phase-lock servosystem comprising a long term integrating device as a voltage...
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3613029 |
CRYSTAL-CONTROLLED CROSS-COUPLED NAND GATE SQUARE-WAVE GENERATOR
An integrated-circuit, crystal-controlled square wave pulse generator employing a pair of cross-coupled NAND gates. The output of one NAND gate is coupled to the other through a piezoelectric...
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3611206 |
TRANSISTOR CRYSTAL OSCILLATOR OPERABLE AT A SUBHARMONIC FREQUENCY OF THE CRYSTAL
A transistor oscillator has a piezoelectric crystal vibrator incorporated therein for the stabilization of the oscillation frequency and for producing an oscillator which may oscillate with a...
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3609592 |
TWO-TERMINAL AMPLIFIER ADAPTED TO BE COUPLED TO A RESONATOR
A two-terminal amplifier adapted to be connected to a resonator, the amplifier of simple and small design, particularly for use in timepieces, having two complementary transistors series-connected...
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3596206 |
TRANSISTOR OSCILLATOR INCLUDING ULTRASONIC GENERATOR CRYSTAL
Ultrasonic oscillators having electronic transducers and excitation circuits for the transducers in which the transducers can be disconnected from the oscillator without causing damage. The...
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3592960 |
AUTOMATIC FREQUENCY CONTROL FOR AN OSCILLATOR IN A CHROMA DEMODULATION CIRCUIT
In the chroma channel of a color television receiver, a demodulator circuit for the chroma subcarrier component and an oscillator circuit for producing a control signal having the frequency and...
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3585526 |
ASTABLE MULTIVIBRATOR HAVING A SWEEP FREQUENCY STABILIZED BY A CRYSTAL OSCILLATOR
A bistable complementary multivibrator is connected to an astable control multivibrator whose sweep frequency is stabilized by a crystal oscillator. The transistors of the complementary...
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3584244 |
OSCILLATOR CIRCUIT FOR AN ULTRASONIC CLEANER, UTILIZING A SATURABLE CORE TRANSFORMER
A piezoelectric transducer for an ultrasonic cleaner is driven by a switching circuit having transistors connected in series. The transducer is connected in series with one transistor and the...
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3581240 |
FREQUENCY MODULATED SOLID STATE CRYSTAL OSCILLATOR PROVIDING A PLURALITY OF CENTER FREQUENCIES
Frequency modulated, solid state oscillator which oscillates at any one of a plurality of center frequencies in response to the positioning of a selector switch that connects a selected center...
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3581236 |
HIGH STABILITY OSCILLATOR
A high stability oscillator having an amplifying channel including a phase adjusting member and a separate reaction channel including a resonant crystal and a temperature stabilizing circuit, the...
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3581239 |
FREQUENCY MODULATED CRYSTAL CONTROLLED OSCILLATOR OPERABLE AT A PLURALITY OF TEMPERATURE COMPENSATED CENTER FREQUENCIES
A frequency modulated, solid state, crystal controlled oscillator, including a voltage variable capacitor, for use in portable transmitters wherein it is desired to operate at a plurality of center...
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3581235 |
CRYSTAL STABILIZED HIGH FREQUENCY TRANSISTOR MULTIVIBRATOR
An astable multivibrator operating in a current mode comprising two transistors with resistive cross-coupling between each collector and the other base and capacitive cross-coupling between...
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3581125 |
OSCILLATOR CIRCUIT FOR ULTRASONIC APPARATUS
An oscillator circuit is provided for ultrasonic apparatus such as ultrasonic cleaners employing a resonant transducer. The circuit includes a pair of transistors connected in series to a source of...
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3577099 |
MICROWAVE OSCILLATOR HAVING DIRECTIONAL COUPLER IN FEEDBACK PATH
A microwave oscillator is provided with a solid-state amplifier device whose output is coupled to the input by a directional coupler. The oscillator characteristics can be reliably calculated, and...
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3576504 |
TRANSFORMERLESS DC TO AC POWER SUPPLY
A transformerless DC to AC power supply which comprises a piezoelectric crystal dimensioned to be resonant at a given frequency, excited to resonance by the application of a sinusoidal signal...
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3569865 |
HIGH STABILITY VOLTAGE-CONTROLLED CRYSTAL OSCILLATOR
A high stability voltage-controlled crystal oscillator having a series coed emitter follower transistor amplifier with a regenerative feedback to a tuned circuit coupled to the base electrode of...
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3568093 |
TEMPERATURE COMPENSATED OSCILLATOR USING TEMPERATURE CONTROLLED CONTINUAL SWITCHING OF FREQUENCY DETERMINING IMPEDANCE
Method of and device for compensating the temperature variation in the oscillation frequency of an oscillator wherein an impedance element, for example, a capacitor coupled to the oscillator is...
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3568091 |
ASTABLE MULTIVIBRATOR USING TWO COMPLEMENTARY TRANSISTOR PAIRS
Disclosed is a multivibrator for use as a time standard in a wristwatch or other small timepiece. The multivibrator comprises a pair of inverters each including complementary insulated gate field...
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3550037 |
OSCILLATOR FREQUENCY CONTROL USING CURRENT CONTROLLED INTERNAL TRANSISTOR CAPACITANCE
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3548346 |
TUNING INTEGRATED CIRCUITS COMPRISING A LAYER OF PIEZOELECTRIC MATERIAL ABOVE A SEMICONDUCTOR BODY
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3546619 |
TONE SIGNALLING DEVICE USING PIEZO-ELECTRIC REED OSCILLATORS
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3543117 |
ELECTROMECHANICAL OSCILLATOR
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3543186 |
FREQUENCY STABILIZED CRYSTAL CONTROLLED TRANSISTOR OSCILLATOR
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3541777 |
CONTROL CIRCUIT FOR THE DRIVE OF A MOVEMENT-REGULATING OSCILLATOR FOR A TIMEKEEPING INSTRUMENT
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3539944 |
DIRECT COUPLED TWO TRANSISTORS CRYSTAL OSCILLATOR
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3534544 |
ELECTRONIC WATCH
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3535655 |
RESONANT PHASE SHIFT OSCILLATOR FOR A SERIES RESONANT LOAD UTILIZING FULL LOAD CURRENT AS OSCILLATOR FEEDBACK
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3534468 |
METHOD OF MAKING AN ELECTROMECHANICAL FREQUENCY RESPONSIVE DEVICE WITH ARMATURE SUPPORTED ON TORSION BAND
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3531739 |
TEMPERATURE COMPENSATED CRYSTAL OSCILLATORS
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3528032 |
FREQUENCY MODULATED CRYSTAL OSCILLATOR INCLUDING VOLTAGE VARIABLE CAPACITOR
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3525875 |
SINGLE WIRE CONTROL SYSTEM
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3525055 |
TEMPERATURE COMPENSATED CRYSTAL OSCILLATOR
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3524082 |
OSCILLATORY ENERGY GENERATING APPARATUS
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3523258 |
LINEAR TRIMMING DEVICE FOR TEMPERATURE CONTROLLED CRYSTAL OSCILLATOR
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3518573 |
OSCILLATOR WITH MULTIRESONATOR CRYSTAL FEEDBACK AND LOAD COUPLING
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3516645 |
ULTRASONIC CLEANER
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3512351 |
ELECTRICAL OSCILLATION GENERATORS
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3512106 |
CLOCK OSCILLATOR
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3512107 |
TRANSISTORIZED CRYSTAL OVERTONE OSCILLATOR
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3508168 |
CRYSTAL OSCILLATOR TEMPERATURE COMPENSATING CIRCUIT
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3502990 |
SUMMATION NETWORK
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