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公开(公告)号：US3555182A
公开(公告)日：1971-01-12
申请号：US3555182D
申请日：1968-05-20
Applicant: RCA CORP
Inventor： GRIEPENTROG DAL F
Abstract: An automatic gain control system for a television receiver employing a fixed biasing arrangement for a video detector, noise inverter, sync separator, and automatic gain control amplifier. The noise inverter operates when noise pulses exceed a threshold limit determined in part by the biasing arrangement. Relatively noise-free sync pulses therefore are supplied to the sync separator and AGC circuit. The AGC circuit is arranged to supply control voltages having different ranges to the R.F. and I.F. amplifiers in the receiver. Furthermore, the AGC circuit operates such that a reference video signal is supplied to the imagereproducing kinescope during a service operating mode.
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2.发明授权Video amplifier for driving a delay line between grounded collector and grounded base 失效用于驱动接地收集器和接地基座之间的延时线的视频放大器
公开(公告)号：US3578901A
公开(公告)日：1971-05-18
申请号：US3578901D
申请日：1968-05-20
Applicant: RCA CORP
Inventor： GRIEPENTROG DAL F
Abstract: Transistorized luminance channel of a color television receiver includes emitter follower coupled to input of luminance delay line and common base amplifier coupled to delay line output. Low output impedance of emitter follower and low input impedance of common base amplifier permits reliable termination of both ends of delay line with resistors substantially matching characteristic impedance of delay line. Common emitter amplifier serves to amplify and invert output of common base amplifier, and inverted signal is applied to power output stage via common collector stage providing a low impedance output circuit. Negative feedback established by path between emitters of common collector and common base amplifiers ensures low source impedance required to adequately drive output stage; feedback path provides convenient facility for frequency response control.
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公开(公告)号：US3555175A
公开(公告)日：1971-01-12
申请号：US3555175D
申请日：1968-05-22
Applicant: RCA CORP
Inventor： GRIEPENTROG DAL F
Abstract: A circuit functions to make the kinescope grid electrode bias track with the cathode electrode bias in a direction to maintain a constant difference therebetween for changes in AC line voltage. A zener diode is coupled across a source of clamping pulses to maintain the level of clamping pulses used to operate a DC restoring circuit for the grid electrode of the kinescope, constant; which, in effect, assures a constant potential difference between the grid and cathode electrodes, both of which are biased from an unregulated supply, subject to potential variations.
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公开(公告)号：CA1214861A
公开(公告)日：1986-12-02
申请号：CA457261
申请日：1984-06-22
Applicant: RCA CORP
Inventor： GRIEPENTROG DAL F , LAGONI WILLIAM A
Abstract: Apparatus for interconnecting a component entertainment system including a bi-directional signal bus for interconnecting some of the components comprises a first switch unit having one input adapted to be coupled to the bi-directional signal bus, at least one other input adapted to be coupled to receive signal from a component not connected to the signal bus and a common output. A second switch unit has one input adapted to receive signal from the component not connected to the signal bus. A signal driver has its input coupled to the output of the second switch unit and its output coupled to the input of the first switch unit adapted to be coupled to the signal bus. The output impedance of the signal driver serves to terminate the signal bus in its characteristic impedance when the driver does not supply signal at its output.
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Patent Agency Ranking
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公开(公告)号：CA1137235A
公开(公告)日：1982-12-07
申请号：CA340811
申请日：1979-11-28
Applicant: RCA CORP
Inventor： GRIEPENTROG DAL F
Abstract: RCA 73,411 A television tuning system for generating a tuning voltage for a varactor controlled local oscillator includes a continuous resistive element having first, second, third and fourth points along its resistive path which define first, second and third resistive sections corresponding, respectively, to the low VHF, high VHF and UHF tuning bands and a movable contact. A position detecting arrangement determines the position of the movable contact along the path of the resistive element to determine which band is being tuned and in response selectively couples voltages corresponding to the magnitudes of the tuning voltage corresponding to the beginning and end points of the various bands to respective points along the resistive element. As a result, with continuous motion of the movable contact a tuning voltage for each channel in the television range is developed at the movable contact.
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公开(公告)号：CA977866A
公开(公告)日：1975-11-11
申请号：CA170399
申请日：1973-05-03
Applicant: RCA CORP
Inventor： GRIEPENTROG DAL F , GRIES ROBERT J
IPC: H04N5/63
Abstract: The instant-on circuit cooperates with a horizontal deflection system of the type utilizing two bi-directionally conductive switching means which serve respectively as trace and commutating switches. When the on-off control for the television receiver is turned to its "ON" position, the two switches cooperate to provide those direct potentials needed for image reproduction on the face of a picture tube kinescope. When the control is turned to its "OFF" position, on the other hand, the trace switch is inactivated, but the commutating switch continues to operate to provide a reduced filament voltage for the picture tube.
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