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Patent Agency Ranking
公开(公告)号：US3823264A
公开(公告)日：1974-07-09
申请号：US22680072
申请日：1972-02-16
Applicant: RCA CORP
Inventor： HAFERL P
Abstract: A video output amplifier utilizes two transistors arranged in cascode configuration for driving the cathode electrode of a color television kinescope. A negative feedback network couples the collector electrode of the output transistor of the cascode configuration to the base electrode of the input transistor of the pair, and includes an arc current limiting resistor which serially couples the output transistor to the kinescope cathode.
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公开(公告)号：US3736378A
公开(公告)日：1973-05-29
申请号：US3736378D
申请日：1972-04-24
Applicant: RCA CORP
Inventor： HAFERL P
CPC classification number: H04N5/10
Abstract: A signal processing stage for a television receiver which performs the combined functions of video demodulation, automatic gain control voltage generation, horizontal synchronizing pulse separation, and vertical synchronizing pulse separation in a single circuit.
Abstract translation: 用于在单个电路中执行视频解调，自动增益控制电压产生，水平同步脉冲分离和垂直同步脉冲分离的组合功能的电视接收机的信号处理级。
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公开(公告)号：US3814980A
公开(公告)日：1974-06-04
申请号：US29686272
申请日：1972-10-12
Applicant: RCA CORP
Inventor： HAFERL P
CPC classification number: H03K6/04
Abstract: A television deflection waveform generator produces an ''''S'''' corrected sawtooth wave. A first charging circuit supplies energy to a second charging circuit which controls the development of the waveform during a first trace portion of the deflection cycle. The first charging circuit primarily controls the development of the corrected waveform during a second trace portion of the deflection cycle.
Abstract translation: 电视偏转波形发生器产生“S”校正的锯齿波。 第一充电电路向第二充电电路供应能量，该第二充电电路在偏转周期的第一跟踪部分期间控制波形的发展。 第一充电电路主要控制在偏转周期的第二跟踪部分期间校正波形的发展。
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公开(公告)号：US3794754A
公开(公告)日：1974-02-26
申请号：US3794754D
申请日：1972-05-08
Applicant: RCA CORP
Inventor： HAFERL P
Abstract: Burst components of PAL-type encoded signal are retained with modulated subcarrier components as they are processed in 1H delay line assembly and delivered to respective demodulators. Reference oscillation phase to which R-Y demodulator responds is effectively reversed every other line, in response to PAL switch apparatus, in order to provide desired R-Y output in successive lines. Reference oscillation phase to which B-Y demodulator responds is alternated by quadrature switch apparatus between B-Y phase (applied throughout each line interval) and R-Y phase (applied during each inter-line blanking interval). A first gating circuit, coupled to the output of the B-Y demodulator, selects that portion of the B-Y demodulator output developed during the burst interval for passage to integrating and amplifying means in order to develop an AFPC voltage for phase control of the local reference oscillator. A second gating circuit, coupled to the output of the R-Y demodulator, selects that portion of the R-Y demodulator output developed during the burst interval for passage to ACC and color killer circuitry. During color operation (enabled state of bandpass chrominance amplifier) the ACC circuiry develops a control current from the second gating circuit output that adjusts the chrominance amplifier gain in a direction appropriate to maintaining burst amplitude substantially constant at a level set by a manual chroma control. The color killer enables the chrominance amplifier for color operation only when the gated R-Y output indicates by its amplitude the presence of a burst in the received signal and by its polarity the correct switching mode for the PAL switch. Unless such circumstances are present, the color killer disables the chrominance amplifier during each line interval; the killer is keyed, however, to enable the chrominance amplifier during each burst interval so that recovery from the disable state may be effected when appropriate. The color killer circuitry also passes a reset pulse to the PAL switch in the absence of a correct mode indication in the gated R-Y output. The color killer circuitry further serves to control the effectiveness of a subcarrier trap for the receiver''s luminance channel, removing the trap during line intervals of monochrome operation.
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公开(公告)号：US3721857A
公开(公告)日：1973-03-20
申请号：US3721857D
申请日：1971-03-05
Applicant: RCA CORP
Inventor： HAFERL P
Abstract: PARABOLIC TOP AND BOTTOM PINCUSHION CORRECTION SIGNALS ARE DEVELOPED BY APPLYING A VERTICAL SAWTOOTH SIGNAL CHOPPED AT THE HORIZONTAL DEFLECTION FREQUENCY TO AN AMPLIFIER. THE RESULTING HORIZONTAL RATE PULSES ARE AMPLITUDE MODULATED BY THE VERTICAL SAWTOOTH SIGNAL AND ARE CONVERTED INTO PARABOLIC SHAPED SIGNALS IN THE AMPLIFIER BY MEANS OF A FEEDBACK PATH FROM THE OUTPUT TO THE INPUT OF THE AMPLIFIER WHICH INCLUDES A DOUBLE DIFFERENTIATING CIRCUIT. THE OUTPUT SIGNALS REVERSE POLARITY AT THE CENTER OF EACH VERTICAL DEFLECTION INTERVAL AS THE POLARITY OF THE VERTICAL DEFLECTION SIGNAL CHANGES. THESE OUTPUT SIGNALS CAN BE APPLIED TO SUITABLE PINCUSHION MODULATION MEANS FOR PROVIDING TOP AND BOTTOM PINCUSHION CORRECTION FOR A WIDE ANGLE TELEVISION DISPLAY.
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