Matches 51 - 90 out of 90 < 1 2
Match Document Document Title
4466127 Entry apparatus of digital value in memory  
A radio receiver having a counter which generates a count value corresponding to the frequency of a station to be received which value is stored in a memory through a load enable signal produced...
4461037 Automatic tuning system for television receiver  
An automatic tuning system for a television receiver. A first binary-coded signal circuit comprising a plurality of comparators for encoding in a binary signal a signal output from a frequency...
4454607 FM Stereophonic receiver with CPU controlled tuning and demodulating  
An FM stereophonic receiver is arranged so that a central processing unit assigned for selection of a broadcasting station is burdened, based on a clock pulse of the central processing unit, to...
4419769 Digital tuning system for a varactor tuner employing feedback means for improved tuning accuracy  
A tuning system for use in a communications receiver having a varactor tuner includes an alterable, non-volatile memory having a plurality of memory locations, each of which is capable of storing a...
4403345 Device for detecting the tuning frequency of a frequency modulation radio receiver  
A device comprising a demodulator, equipped with a frequency synthesizer for synthesizing different tuning frequencies, for use in radio receivers. The device further comprises a counter for...
4392254 Mechanical tuner with microphonics elimination circuitry  
A mechanical radio receiver tuner with microphonics elimination circuitry is disclosed. During a mechanical tuning mode, the mechanical position of a movable tuning element provides an associated...
4367558 Method for automatically searching for an RF station  
A method of automatically searching for an RF carrier uses a synthesized frequency. The synthesized frequency is generated by a voltage controlled oscillator which is part of a phase locked loop....
4355412 Preset station selecting device in a radio receiver  
In a radio receiver which is electrically tuned to a broadcasting frequency, a preset station selecting device having a memory, a first circuit which previously writes a broadcasting frequency into...
4352209 Up-down frequency converter for cable T.V.  
A cable television up-down tuner includes a first frequency up conversion stage in which a first local oscillator, tunable over a wide frequency range, is coupled to a ring diode mixer having...
4320530 Channel selecting apparatus employing frequency synthesizer  
A tuner comprises a local oscillator including a variable capacitance diode. The output signal of the local oscillator is frequency divided by a prescaler and the frequency divided output is...
4298988 Digital channel selection and fine tuning system  
A tuning system for use in a radio frequency multi-signal receiving system, e.g., for CATV converters, utilizes a closed feedback loop digital arrangement for channel selection (local oscillator...
4281415 Digital tuner  
A variable rate tuner is one in which the rate of change of tuned frequency with respect to tuning shaft rotation varies automatically as a function of the shaft rotation speed. In this tuner the...
4271531 Frequency synthesizer  
In a frequency synthesizer with phase-locked loop in which the output signal from a voltage controlled oscillator is frequency-divided by a variable frequency dividing circuit and the...
4271530 Receiver having a frequency synthesizing circuit  
In a receiver having a frequency synthesizing circuit, the deviation of the tuning of the intermediate-frequency section relative to a standard tuning is periodically measured by means of a...
4270220 Electronic tuning type television receiver  
A television receiver of electronic tuning type employing a variable capacitance diode in a local oscillator of its tuning circuit, which comprises a memory storing a plurality of digital data...
4267601 Tuning control apparatus for a frequency synthesizer tuner  
Tuning control apparatus is provided for use with a frequency synthesizer tuner of the type having a phase-locked loop including a reference oscillator, a variable frequency oscillator to produce a...
4240115 Channel selection voltage generator  
A channel selection voltage generator comprises a tuning voltage generator circuit having a capacitor for supplying a tuning voltage to an electronic tuner, a first constant current source for...
4223406 Multi band radio receiver system with phase locked loop  
A multi band radio employs frequency counters to determine a scaling factor during coarse tuning which is employed in a phase locked loop to control the frequency of a local oscillator during...
4220922 Preset tuner  
A preset tuner adapted for selecting a desired one out of a plurality of preset channels, comprising: a memory for storing digital data concerning a plurality of channels to be preset, push-buttons...
4218657 Hangup corrector useful in locked loop tuning system  
A phase locked loop tuning system for a television receiver includes a reference oscillator, a reference divider for dividing the frequency of the output signal of the reference oscillator, a...
4155043 Channel selection apparatus including a scanning system  
A channel selection apparatus of the scanning tuning type in which a tuning frequency is swept by a sweeping voltage to select a given tuning frequency. The sweep of the frequency is controlled for...
4132951 Digital processor controlled radio system  
A radio system includes a charge transfer device transversal filter for receiving electronic input signals comprised of at least one frequency band. The charge transfer device simultaneously...
4091410 Frequency and phase lock loop synchronous detecting system having a pair of phase lock conditions  
A synchronous detecting system includes an automatic phase and frequency control system having a pair of multipliers coupled to a television tuner. A detector oscillator is also coupled to each of...
4078212 Dual mode frequency synthesizer for a television tuning apparatus  
Television tuning apparatus includes a first phase locked loop configuration for tuning a local oscillator to a nominal frequency appropriate for converting a standard radio frequency carrier...
4004233 Search type tuning device  
A search type tuning device wherein the output signal representing the difference frequency between the output frequency from a voltage-controlled frequency sweep oscillator and a reference...
3980951 Electronic tuning control system for television  
A fine tunable electronic channel select system for controlling the varactor tuner of a television receiver or the like and including a dual mode prescaler for dividing the local oscillator (VCO)...
3949308 Varactor control unit using Q variable inductances  
A circuit for providing TV channel selection and tuning voltages utilizes a plurality of fixed resistors and a plurality of Q variable inductances. A channel selection switch connects particular...
3913020 Electronic television tuning system  
An electronic television tuning system employs a single oscillator as the sole local oscillator for all VHF and UHF channels and also as part of a frequency synethesizer system used to select and...
3908165 Field strength meter  
A signal strength meter indicates signal level directly in dBmV. The signal under test is attenuated to a level which centers a meter indicator, and the attenuator movement is translated into...
3845393 COMMUNICATION RECEIVER WITH TUNING CIRCUITS THAT TRACK THE L.O.  
A receiver has a synthesized L.O. A code converter is coupled to it and causes the R.F. tuned circuits to track the frequency of the L.O.
3679980 SOLID STATE TELEVISION TUNER WITH VOLTAGE VARIABLE CAPACITORS  
A solid state television tuner is disclosed herein. Actuation of a channel selector mechanism to one of a plurality of channel selection settings connects a distinctive level of voltage to a wide...
3551820 INDEPENDENTLY ADJUSTABLE MULTIOUTPUT VOLTAGE DIVIDER AND VOLTAGE RESPONSIVE CAPACITANCE TUNER UTILIZING SAME  
3440544 MANUAL,AUTOMATIC,AND SEMIAUTOMATIC TUNING CIRCUITS UTILIZING VOLTAGE VARIABLE CAPACITANCE DIODES  
3333202 Television tuner  
3308403 Oscillator circuit  
3302119 Tunable television receiver  
3163823 Digital receiver tuning system  
2997579 Tunable oscillator circuit  
2901614 Coarse frequency discriminator  
3821650 Title is not available  
Matches 51 - 90 out of 90 < 1 2