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公开(公告)号：CA1027242A
公开(公告)日：1978-02-28
申请号：CA200036
申请日：1974-05-15
Applicant: RCA CORP
Inventor： GEORGE JOHN B
IPC: H03G3/30
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公开(公告)号：CA986220A
公开(公告)日：1976-03-23
申请号：CA175979
申请日：1973-07-09
Applicant: RCA CORP
Inventor： CARLSON DAVID J , GEORGE JOHN B
Abstract: A desk top calculator or other generator of digitized video signals is coupled to the antenna terminals of a conventional television receiver. A circuit within the generator translates the digitized video signals into a modulated TV R-F picture carrier. The circuit includes a radio-frequency source, and a network of diode switchable attenuators. The latter are operated in response to control signals for switching the radio-frequency signal between three discrete levels. Two of the levels are for the display of black and white, respectively, and the third level is a "blacker than black" synchronization level.
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公开(公告)号：CA1137171A
公开(公告)日：1982-12-07
申请号：CA355779
申请日：1980-07-09
Applicant: RCA CORP
Inventor： SAKARYA DURSUN , GEORGE JOHN B
Abstract: -12- RCA 74,141 In an infrared (IR) remote control transmitter, a main amplitude regulator is provided to regulate the amplitude of pulses applied to the transmitter's driver so as to maintain infrared radiation at a level consistent with proper operation but well below a safe limit for IR radiation under normal operating conditions. An auxiliary amplitude regulator is also provided to regulate the amplitude of pulses applied to the driver so as to maintain infrared radiation below the safe limit if the amplitude exceeds a predetermined threshold level due to a component failure of the main amplitude regulator. An average detector is also coupled to the auxiliary amplitude regulator so that the amplitude of the pulses applied to the driver is reduced should their width exceed beyond a desired value due to a component failure or misoperation of the transmitter.
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Patent Agency Ranking
公开(公告)号：CA1057843A
公开(公告)日：1979-07-03
申请号：CA251645
申请日：1976-05-03
Applicant: RCA CORP
Inventor： GEORGE JOHN B
Abstract: HIGH POWER REMOTE CONTROL ULTRASONIC TRANSMITTER A wide bandwidth, high gain ultrasonic frequency transducer drive circuit utilizes a relatively low voltage source of supply voltage. A first signal path from a source of drive signals includes circuitry resonant with the transducer for providing a relatively high signal voltage across this transducer. A second signal path from the source of drive signals includes a resonant circuit mutually coupled to the first resonant circuit for inducing signal energy into the first path and increasing the signal voltage across the transducer.
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公开(公告)号：CA1035429A
公开(公告)日：1978-07-25
申请号：CA213191
申请日：1974-11-07
Applicant: RCA CORP
Inventor： GEORGE JOHN B
Abstract: Synchronous video detection in a television receiver provides increased detection linearity and better signal-to-noise ratio for weak signals than does envelope video detection. Impulse noise, which produces generally unobtrusive black-going noise components in a picture reproduced in response to a video signal recovered by envelope detection from a negatively modulated carrier also produces obtrusive white-going noise components in a picture reproduced in a response to a video signal recovered by synchronous detection. Common signal processing means, responsive to the envelope of the video signal modulated intermediate frequency carrier, inverts the white-going noise impulses to produce black-going components so that substantially all noise impulses appear black-going in the recovered signal.
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公开(公告)号：CA993520A
公开(公告)日：1976-07-20
申请号：CA138496
申请日：1972-03-29
Applicant: RCA CORP
Inventor： GEORGE JOHN B
IPC: H03G3/30
Abstract: A television receiver includes VHF and UHF tuners, each having a separate radio frequency amplifier. The AGC control voltage developed in the receiver and used for VHF gain control is adapted to control the gain of the UHF tuner and to otherwise accommodate the different gain characteristics of the UHF amplifier.
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公开(公告)号：CA916258A
公开(公告)日：1972-12-05
申请号：CA916258D
Applicant: RCA CORP
Inventor： HILLIKER STEPHEN E , GEORGE JOHN B
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