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3662295 |
ADJUSTING DEVICE FOR A COMMUNICATIONS RECEIVER
An adjusting device for a communications receiver which comprises a plurality of potentiometers each having a plurality of resistance sections for different frequencies that can be moved over in...
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3662287 |
VOLTAGE CONTROLLED OSCILLATOR MULTIPLIER
A voltage controlled oscillator and varactor multiplier circuit having a actor network coupling the output of an oscillator through a band pass filter to an output in which a single varactor...
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3659205 |
VARACTOR TUNED MICROSTRIP TUNER
Disclosed is a microstrip TV Tuner which is electronically tuned and the film portions of the tuner are photographically delineated on an insulating substrate.
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3657654 |
COMMUNICATIONS RECEIVER EMPLOYING VARACTOR CONTROLLED TUNING STAGES
In a communications receiver the local oscillator output signal is converted to a voltage signal proportional to the oscillator frequency. That voltage signal is applied to the voltage-sensitive...
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3654557 |
SYSTEM FOR SELECTING CHANNEL
A system for selecting stations or channels for television broadcasting, wherein a signal from a binary signal generator is fed to a channel selection circuit for driving the same to select a...
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3652960 |
VARIABLE CAPACITANCE DIODE FREQUENCY SELECTOR UTILIZING A PLURALITY OF FLIP-FLOPS
A tuning system for selecting, for instance, stations or broadcasting television channels, wherein the tuning can be made totally electronically by impressing the output of a digitally controlled...
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3651409 |
ELECTRONICALLY TUNED ULTRA HIGH FREQUENCY TELEVISION TUNER WITH FREQUENCY TRACKING TUNABLE RESONANT CIRCUITS
An ultra high frequency (UHF) tuner includes a plurality of tunable transmission lines formed on a dielectric plate. At least two of the transmission lines are tunable over different bands of...
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3651411 |
AUTOMATIC-RECYCLING SIGNAL-SEEKING VOLTAGE-CONTROLLED TUNER
A signal-seeking system for a voltage-controlled tuner wherein automatic recycling is achieved when the control voltage exceeds one limit of the control voltage range. A detector senses the control...
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3649937 |
ELECTRONICALLY TUNED ULTRA HIGH FREQUENCY TELEVISION TUNER
An ultra high frequency (UHF) tuner includes tunable transmission lines having two conductive sections disposed on one face of a dielectric plate opposite a conductive ground plane disposed on the...
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3646449 |
INPUT STAGE FOR A RECEIVER, PARTICULARLY FOR THE MEDIUM WAVE
A receiver input stage for the reception of signals in a broad frequency range comprising an input resonant circuit and an output resonant circuit that is identical to the antenna-input circuit....
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3644749 |
DIODE DELAY LINE
A delay line adapted for fabrication in integrated circuit form and suitable for use in a television receiver or the like is in the form of an RC circuit in which the capacitors are zener diodes,...
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3644853 |
VOLTAGE-CONTROLLED SIGNAL-SEEKING TUNING SYSTEM
A signal-seeking tuning system for a receiver having a voltage-controlled tuner wherein a switching circuit, a low-leakage storage capacitor, and a metal oxide field-effect transistor are provided...
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3641463 |
LINEARITY COMPENSATION FOR A VOLTAGE-CONTROLLED OSCILLATOR
A circuit using a voltage-controlled oscillator with a hyperabrupt junction diode in the series resonant circuit is operated as a variable frequency modulation circuit. An amplifier with an...
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3631349 |
AUTOMATIC SIGNAL-SEEKING CIRCUITRY
An FM receiver having a source of detected signals and a voltage-responsive tuner includes signal-seeking apparatus having a charging circuit coupled to the source of detected signals, connectable...
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3628152 |
TELEVISION TUNING CIRCUIT UTILIZING VOLTAGE VARIABLE CAPACITANCE
A tunable resonant circuit includes a pair of inductors serially connected between input and output terminals. The parallel combination of a third inductor and a voltage-responsive capacitance...
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3626327 |
TUNABLE HIGH-POWER LOW-NOISE STABILIZED DIODE OSCILLATOR
The invention disclosed is a tunable high-power low-noise stabilized frequency semiconductor diode oscillator unit which comprises a semiconductor diode, suitably a Gunn or Avalanche diode, located...
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3624514 |
TUNING CIRCUIT HAVING COMMON TUNING ELEMENT FOR THREE FREQUENCY RANGES AND SELF-OSCILLATING MIXER USING SAME
A tuning circuit for the reception of signals from three spaced frequency ranges, comprising parallel resonant circuits having at least one common tuning element for all the frequency ranges. The...
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3624554 |
ULTRAHIGH FREQUENCY OSCILLATOR UTILIZING TRANSMISSION LINE TUNABLE RESONANT CIRCUITS
An ultrahigh frequency oscillator utilizes tunable transmission lines as a frequency determining network. The circuit includes a dielectric plate having a conductive section disposed on a first...
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3622914 |
AMPLITUDE MODULATED CRYSTAL OSCILLATOR
A circuit for producing amplitude modulated waves has a tuning circuit which is connected to the output of a crystal oscillator and which contains a voltage variable capacitance load, such as a...
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3621471 |
RESONANT NETWORK WITH REACTIVELY COUPLED FET PROVIDING LINEAR VOLTAGE/FREQUENCY RESPONSE
A field-effect transistor with two gates has a resistance and a reactance serially connected across its drain and source, with one gate tied to the junction of these two impedances whereas the...
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3617915 |
TUNING CIRCUIT HAVING A NEUTRALIZING CIRCUIT
An electronic tuning circuit comprising a serial circuit of a high-frequency band tuning coil and a low-frequency band tuning coil for tuning with broadcast waves having channels in the high- and...
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3614666 |
TUNING A VARIABLE OSCILLATOR
In a system for automatically tuning a ringing circuit, the voltage vs frequency curve of the ringing circuit is incrementally scanned and compared to a reference voltage. The frequency increments...
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3612883 |
RESONANT CAVITY PHOTON SENSOR COMPRISING SEMICONDUCTOR MATERIAL SANDWICHED BETWEEN TWO LAYERS OF DIELECTRIC
The invention relates to a sensor which uses a semiconductor material which responds to photons to produce electron-hole pairs. The semiconductor operates in combination with a microwave cavity....
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3611154 |
DIODE SWITCHING OF TUNED CIRCUITS WITH BACK-BIAS DERIVED FROM OSCILLATOR RECTIFICATION
A tuning circuit particularly for a superheterodyne receiver capable of operating within two widely separated frequency ranges by using a single voltage source to bias switching diodes located...
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3601723 |
ELECTRONIC TUNING APPARATUS FOR MICROWAVE CIRCUITS
Tuning apparatus for a resonant cavity comprises a varactor diode capacitively coupled into the cavity by means of a half-wavelength of, or n half-wavelengths of, a transmission line, and a return...
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3601722 |
TUNING ARRANGEMENT FOR STORABLE STATION SELECTION IN TELEVISION RECEIVERS
A tuning arrangement for television receivers including a support, a rotary selector having predetermined fixed positions into which said selector may be set mounted on said support, a first tuning...
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3601703 |
CHANNEL SELECTING DEVICE FOR VOLTAGE RESPONSIVE TV TUNER
A television tuner arrangement is disclosed including a wide band signal selecting circuit having a solid state voltage variable capacitance selectively controllable in accordance with the level of...
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3600706 |
VARACTOR CONTROLLED AFC CIRCUIT FOR WIDE BAND TUNER
An AFC control circuit for an oscillator that is tunable over a wide frequency band produces a relatively constant frequency change or "pull-in" range at any frequency value within the band. The...
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3596183 |
MULTIBAND TUNING CONTROL SYSTEM WIGH PROGRAMMABLE ELECTRONIC SWITCHING
Tuning of a television receiver capable of receiving signals in the UHF and VHF bands of frequencies is controlled by an electronic ring counter circuit, the outputs of which are supplied through...
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3584141 |
AUTOMATIC TUNING DEVICE FOR TELEVISION RECEIVER
An electronic automatic tuning device for television receivers, wherein in order to enable only a video carrier wave to be tuned in and prevent an audio carrier wave from being tuned in when the...
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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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3581252 |
POTENTIOMETER CIRCUIT ARRANGEMENT FOR DERIVING A TUNING VOLTAGE
A circuit arrangement for deriving a tuning voltage for controlling a tuning capacitance includes a plurality of potentiometers connected to form a voltage divider, each having a resistance path...
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3575661 |
REMOTE CONTROL TUNING CIRCUIT
Remote control tuning of a television set is accomplished by providing a desired DC voltage level derived from an input signal at a particular frequency to a capacitor through a neon tube, and the...
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3573683 |
VARACTOR DIODE TUNED CIRCUIT HAVING SUBSTANTIALLY CONSTANT LOADED Q-FACTOR
A tuned circuit arrangement comprising a tuned circuit having varactor diode means for the tuning thereof over a band of frequencies, and compensation means operative for providing selective...
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3573684 |
TUNER FOR A WAVE SIGNAL RECEIVER
A variable amplitude DC control voltage, for tuning varactor-diode type tunable circuitry, is developed by a light-controllable voltage source having a light-sensitive device, such as a...
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3573631 |
OSCILLATOR CIRCUIT WITH SERIES RESONANT COUPLING TO MIXER
An oscillator circuit tuned by a voltage dependent variable capacitance diode is coupled to a mixer stage by a wide band injection circuit which includes a series connected inductor and capacitor...
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3571724 |
ELECTRICALLY TUNABLE SIGNAL SEEKING TUNER
An all-electronic signal seeking receiver in which a binary counter and a transistorized resistor matrix utilized to produce an incremental step voltage for reverse biasing a varactor diode...
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3569850 |
HIGH FREQUENCY AMPLIFIER WITH LINE CIRCUITS
A high frequency amplifier has a line circuit which is resonant at some selected frequency, and which line circuit includes a variable capacitive diode means arranged to tune the line circuit, and...
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3568112 |
DIGITAL PUSHBUTTON TUNING FOR SIGNAL-CONTROLLED RECEIVER
A tuner for a signal-controlled communication receiver is disclosed, in which a plurality of tuning signal levels are established at a series of terminals. Frequency selecting means comprising...
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3551846 |
ELECTRONICALLY TUNABLE RESONANT CIRCUITS
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3551820 |
INDEPENDENTLY ADJUSTABLE MULTIOUTPUT VOLTAGE DIVIDER AND VOLTAGE RESPONSIVE CAPACITANCE TUNER UTILIZING SAME
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3544903 |
VARIABLE INDUCTOR BAND CHANGING FOR VHF-UHF TUNER
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3543185 |
PULSE GENERATOR WITH STEP FREQUENCY CONTROL
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3538460 |
HIGH POWER ELECTRONICALLY TUNABLE MICROWAVE FILTER COMPOSED OF NONRESONANT FILTER SUBUNITS IN SERIES
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3535656 |
VOLTAGE CONTROLLED SOLID STATE CIRCUIT
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3534295 |
LINEARIZED FREQUENCY MODULATED CRYSTAL OSCILLATORS COMPENSATED FOR AMBIENT TEMPERATURE VARIATIONS
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3533000 |
SELF-BIASING FREQUENCY DISCRIMINATOR CIRCUIT
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3531739 |
TEMPERATURE COMPENSATED CRYSTAL OSCILLATORS
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3528043 |
VOLTAGE CONTROLLABLE TUNING CIRCUIT WHICH RESPONDS LINEARLY IN FREQUENCY WITH LINEAR DIAL CHANGES
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3528044 |
TOUCH CONTROLLED TV CHANNEL SELECTOR COMPRISING A PLURALITY OF BISTABLE SWITCHING CIRCUITS
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