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公开(公告)号：KR840001294B1
公开(公告)日：1984-09-07
申请号：KR810000122
申请日：1981-01-17
Applicant: RCA CORP
Inventor： SHANLEY JR ROBERT L , HARWOOD LEOPOLD A , WITTMANN ERWIN J
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公开(公告)号：KR850000315B1
公开(公告)日：1985-03-18
申请号：KR800003888
申请日：1980-10-10
Applicant: RCA CORP
Inventor： HORWOOD LEOPOLD A , WITTMANN ERWIN J
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公开(公告)号：US3460049A
公开(公告)日：1969-08-05
申请号：US3460049D
申请日：1967-12-15
Applicant: RCA CORP
Inventor： WITTMANN ERWIN J
CPC classification number: H03F3/45071 , H03F3/347 , H03F3/45479 , H04B1/1623
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公开(公告)号：CA1249666A
公开(公告)日：1989-01-31
申请号：CA514636
申请日：1986-07-24
Applicant: RCA CORP
Inventor： ARMER JOHN , WITTMANN ERWIN J
Abstract: When a positive or a negative overflow error condition is encountered, the present invention substitutes the most positive or most negative value for the erroneous sample. The sign bit of a potentially erroneous value is inverted to form the MSB of the substitute value, and this value is, in turn, inverted and expanded to form the n-1 LSB's of the substitute value. If an overflow error condition is detected, the erroneous value is replaced by the substitute value.
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公开(公告)号：CA1142640A
公开(公告)日：1983-03-08
申请号：CA361234
申请日：1980-09-30
Applicant: RCA CORP
Inventor： HARWOOD LEOPOLD A , WITTMANN ERWIN J
Abstract: RCA 72,790 A controlled oscillator comprises an amplifier including an active device, a filter network arranged in a feedback loop of the amplifier for providing regenerative feedback to sustain oscillation of the amplifier, and a source of control signals. Output oscillatory signals from the amplifier and output control signals from the control source are summed by a combining network to produce a resultant controlled signal, which is coupled to the filter network. Parasitic capacitances associated with output terminals of the amplifier and control source impart an unwanted phase shift to the controlled signal. A compensation signal derived from the oscillator is supplied to the combining network with a magnitude and phase to offset the unwanted phase shift, to thereby produce a phase compensated resultant controlled signal.
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Patent Agency Ranking
公开(公告)号：CA1142608A
公开(公告)日：1983-03-08
申请号：CA368436
申请日：1981-01-13
Applicant: RCA CORP
Inventor： HARWOOD LEOPOLD A , WITTMANN ERWIN J
Abstract: RCA 72,789 An arrangement for symmetrically gain controlling a differential amplifier is disclosed. A control circuit including first and second similarly arranged transistors coupled between points of operating potential develops first and second control voltages of prescribed magnitude at collector outputs of the transistors. The first transistor is biased to provide the first control voltage at a fixed, prescribed level related to the gain control bias requirements of the amplifier. The second control voltage varies symmetrically with respect to the first control voltage in response to the setting of a potentiometer coupled to a bias circuit of the second transistor. The potentiometer is connected directly between points of operating potential such that the control voltages are equal for a center potentiometer setting, and the second control voltage varies symmetrically with respect to the first control voltage as the potentiometer is adjusted between minimum and maximum extremes to thereby produce symmetrical amplifier gain control. Symmetrical gain control is predictable and independent of potentiometer tolerance effects and variations of the operating potentials associated with the control circuit.
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公开(公告)号：DD157847A5
公开(公告)日：1982-12-08
申请号：DD21877080
申请日：1980-01-31
Applicant: RCA CORP
Inventor： HARWOOD LEOPOLD A , WITTMANN ERWIN J , SHANLEY ILL ROBERT L
Abstract: Brightness control apparatus for a video signal image reproducing system including a video signal processing channel, a kinescope driver for supplying video signals to an image reproducing kinescope, and a source of substantially fixed potential to which signals processed by the kinescope driver are referenced. A comparator senses the substantially fixed reference potential and a blanking level which occurs during periodic blanking intervals of the video signal, and provides an output control signal indicative of the voltage difference between the reference potential and the blanking level. The control voltage is applied to the video channel for translating the blanking level in a direction to minimize the voltage difference, to thereby establish the conduction of the kinescope driver during image intervals of the video signal at a level corresponding to a desired image black level condition when such condition is manifested by the video signal.
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公开(公告)号：CA1135402A
公开(公告)日：1982-11-09
申请号：CA344639
申请日：1980-01-29
Applicant: RCA CORP
Inventor： HARWOOD LEOPOLD A , WITTMANN ERWIN J , SHANLEY ROBERT L II
Abstract: RCA 72,669 of the Invention Brightness control apparatus for a video signal image reproducing system including a video signal processing channel, a kinescope driver for supplying video signals to an image reproducing kinescope, and a source of substantially fixed potential to which signals processed by the kinescope driver are referenced. A comparator senses the substantially fixed reference potential and a blanking level which occurs during periodic blanking intervals of the video signal, and provides an output control signal indicative of the voltage difference between the reference potential and the blanking level. The control voltage is applied to the video channel for translating the blanking level in a direction to minimize the voltage difference, to thereby establish the conduction of the kinescope driver during image intervals of the video signal at a level corresponding to a desired image black level condition when such condition is manifested by the video signal.
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公开(公告)号：CA950544A
公开(公告)日：1974-07-02
申请号：CA126521
申请日：1971-10-29
Applicant: RCA CORP
Inventor： WITTMANN ERWIN J
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