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7872539 |
Energy efficient waveform generation using tuned resonators
A power source, a primary inductor, a load capacitance, and one or more tuned branch resonators and switching devices are coupled to generate pulses which represent a superposition of sinusoidal...
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7782149 |
Energy efficient waveform generation using tuned resonators
A power source, a primary inductor, a load capacitance, and one or more tuned branch resonators and switching devices are coupled to generate pulses which represent a superposition of sinusoidal...
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7667548 |
Oscillation maintenance circuit for half duplex transponder
An oscillation maintenance circuit for a half-duplex transponder that has an LC resonant circuit, a storage capacitor and a rectifier connected to charge the storage capacitor with a rectified...
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7479838 |
Energy efficient waveform generation using tuned resonators
A power source, a primary inductor, a load capacitance, and one or more tuned branch resonators and switching devices are coupled to generate pulses which represent a superposition of sinusoidal...
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7005935 |
Switched reactance modulated E-class oscillator
A modulated Class E oscillator. In one embodiment, the modulated Class E oscillator may achieve high coil currents (about 1A) and voltages (about 500V) with low power components. Current may be...
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6806783 |
Circuit assembly for generating RF oscillation plucking pulses
In a circuit assembly for generating pulses sustaining or “plucking” RF oscillations in a resonant circuit (12) of transponder (10) having no battery power supply in which the supply voltage nee...
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6762561 |
Radio frequency resonator
An apparatus having a radio frequency resonator, which has a coil, a capacitor means and at least one switch means being associated with another capacitor means, a resistor means and a high voltage...
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5942953 |
Oscillation circuit driven alternately by two different square wave periodic signals having different half cycle durations
A circuit arrangement is provided with a controlled switch which is controlled by means of a periodic switching signal for operating an oscillation circuit at a frequency f, and with a control...
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5235142 |
Phase reference system for cordless looping digitizer
In a cordless, electro-magnetic digitizing system having a drive circuit outputting a square wave drive signal of known initial polarity to a transducer coil in a cursor to oscillate the transducer...
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5227740 |
Oscillation maintenance circuit
A circuit arrangement is described with the aid of which a control signal can be generated in dependence upon the occurrence of an extreme value of a sinusoidal oscillation. The circuit arrangement...
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5170414 |
Adjustable output level signal transmitter
An adjustable output level transmitter includes a direct current energy source, an L-C tank circuit and a switching means for sequentially coupling the capacitors of the tank circuit to the direct...
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5010307 |
Oscillator having periodically pulsed crystal
An oscillator circuit for use with a supply line and a line at a reference potential includes a crystal and a switching stage, the switching stage being closeable to connect the crystal to the...
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4972438 |
Self-oscillating transmitter
A device for use as a self-oscillating Class D transmitter is disclosed which uses feedback to maintain the oscillation at the resonant frequency of the device, thereby optimizing the efficiency of...
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4868527 |
Frequency set-on oscillator
A frequency set-on oscillator comprises an input switch (12) an amplifier (22) and a delay line (16). A frequency divider (14) having two outputs is provided in line with the input switch (12). The...
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4767999 |
Method of and apparatus for radio-frequency generation in resonator tank circuits excited by sequential pulses of alternately opposite polarity
A method of and apparatus for exciting harmonic generation of radio frequency in a tank resonant circuit by bipolar spaced, half-cycle pulses, wherein the period of the tank resonant frequency...
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4618835 |
Proximity sensor oscillator utilizing controlled charge
A proximity sensor oscillator is disclosed having controlled charge. The proximity sensor oscillator includes a resonant circuit which oscillates at a frequency determined by the components of the...
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4138679 |
Circuit for synchronizing the oscillation of a pulsed oscillator with a reference oscillation
A circuit is provided for synchronizing the oscillation Uo of a pulsed oscillator with a reference oscillation Um of comparatively small amplitude. The reference oscillation is coupled into the...
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3995234 |
Ringing oscillator including a resonant circuit with frequency divider feedback loop
A tuned circuit resonates to produce a ringing signal. The signal is fed to frequency divider which generates an oscillator output pulse. The pulse is fed back to the tuned circuit for impulse...
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3916373 |
Ultrasonic transmitter for the remote control of radio and television receivers
A polarizing DC voltage is generated at the capacitance of an ultrasonic transducer and then short circuited by a parallelly arranged electronic switch controlled by the command signal frequency to...
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3890579 |
Ignition system and components thereof
A system for igniting, by a spark, the main burner of a gas fired device without the use of a pilot light from, for example, 12 or 24 volts. A unique oscillator provides the spark power and...
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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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3833865 |
HEART SIMULATOR
An electronic circuit which generates an electric waveform which is similar to that produced by the human heart. The circuit simulates the heart pulse rate over a range of approximately 40-200...
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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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3819933 |
DETECTOR TRACK CIRCUIT FOR RAILROAD CROSSINGS
A separate transmitter source of periodic high voltage pulses is coupled to each approach section rails at the end distant from the permanent shunt across the rails at a railroad crossing. Each...
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3731201 |
CIRCUIT ARRANGEMENT FOR GENERATING RADIO FREQUENCIES
The invention provides a general purpose RF oscillator which may have any of many uses, depending upon bias and voltage levels which may be used. An LC circuit is repeatedly triggered into...
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3720883 |
TUNED OSCILLATOR CIRCUIT FOR PROVIDING A ROTATING MAGNETIC FIELD
A tuned field drive circuit for use in magnetic domain apparatus is provided for generating a reversible, rotating, magnetic field in a plane. The circuit is capable of initiating, maintaining and...
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3699386 |
FIRING CIRCUIT FOR GAS DISCHARGE TUBES
This specification describes a circuit for triggering a gas tube in response to a pulse whose magnitude may be small and whose length is indeterminate and may be short with respect to the time...
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3671775 |
PULSE SHAPING CIRCUIT WITH MULTIPLIER APPLICATION
A pulse shaping circuit comprising a series resonant circuit and a shunt resistor-diode damping circuit in combination with a square wave input and a grounded base transistor load to provide a...
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3671773 |
D.C. CONVERTER HAVING CONTROL TRANSISTOR IN BLOCKING OSCILLATOR FEEDBACK
An apparatus for increasing an applied DC voltage level to a higher DC voltage level by utilizing a current feedback network to provide fast switching and control in the power transistors.
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3617622 |
OSCILLATOR CIRCUITS FOR PROVIDING A VARIABLE AMPLITUDE OUTPUT SIGNAL UNDER CONTROL OF AN INJECTED INPUT SIGNAL
An oscillator circuit includes a first amplifier and a limiter amplifier coupled together through a filter network for supplying AC feedback thereto of a sufficient phase and magnitude to sustain...
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3534243 |
INVERTER WITH STARTING CIRCUIT
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3518551 |
CIRCUIT ARRANGEMENT FOR MEASURING THE DAMPING OF AN OSCILLATION
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3503008 |
PHASE MODULATION OSCILLATOR
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3588912 |
ELECTROJUNCTION PRINTING PULSE DRIVER CIRCUIT
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3480880 |
AMPLITUDE STABILIZED LC TRANSISTOR OSCILLATOR
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3465264 |
PHASE INDICATOR
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3458731 |
PRECISION TIMING PULSE GENERATOR
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3439220 |
SINUSOIDAL TIME BASE SYSTEMS
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3437986 |
ECHO SOUNDING APPARATUS
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3415949 |
Frequency burst synchronization circuit
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3408460 |
Method and apparatus for testing hearing
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3384711 |
Repeater for pulse code modulated signals
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3381533 |
Rapidly starting oscillator
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3368164 |
High frequency, high power solid state generator
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3366805 |
Semiconductor diode microwave pulse generator
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3363051 |
Color television receiver oscillator with degenerative network
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3328725 |
Oscillating circuit inverter producing a low distortion output
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3325750 |
High resolution time interval measuring circuit employing a balanced crystal oscillator
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3324408 |
Electronic siren including a shock excited resonant circuit
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3324413 |
Shock-excited resonant circuit sweep voltage generator
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