ELECTRONIC SIGNAL AMPLIFIER
    42.
    发明专利

    公开(公告)号:AU3861872A

    公开(公告)日:1973-08-09

    申请号:AU3861872

    申请日:1972-02-03

    Applicant: RCA CORP

    Abstract: Semiconductor voltage follower arrangements adapted for construction in integrated circuit form. A load circuit is coupled to the emitter of a voltage follower transistor. Operating potential is supplied to the collector of the follower transistor via the base-emitter circuit of a second transistor arranged in a common emitter transistor. The collector-emitter circuit of a regulator transistor is coupled across the load circuit. Feedback is provided from the output of the common emitter transistor to the input of the regulator transistor such that the collector current of the follower transistor is substantially independent of input voltage variations applied to the base of the follower transistor.

    45.
    发明专利
    未知

    公开(公告)号:FI871785A

    公开(公告)日:1987-10-31

    申请号:FI871785

    申请日:1987-04-23

    Applicant: RCA CORP

    Abstract: A sync separator detects, in a corresponding part of the waveform of a video signal (100), the occurrence of the trailing edge of a corresponding sync pulse, in accordance with the rate of change of the video signal. Information obtained from the sync tip and the back porch portions of the corresponding sync pulse is used for generating a slice level signal (SL). A comparator (20) responsive to the slice level signal separates a sync signal (100a) from the video signal (100).

    47.
    发明专利
    未知

    公开(公告)号:FI73551B

    公开(公告)日:1987-06-30

    申请号:FI830512

    申请日:1983-02-15

    Applicant: RCA CORP

    Abstract: An analog carrier signal and its sidebands contain modulated information which is to be digitally encoded and processed. Demodulation and digital encoding is accomplished in a single process by an analog-to-digital converter, which samples the analog signals in response to a sampling signal of a frequency which is at least twice the bandwidth of the band of frequencies containing the carrier signal and its information-bearing sidebands. The analog signal samples are digitally encoded, producing a band of digital information signals corresponding to baseband signal components. When used in a television receiver to produce digital signal samples, the band of analog signals may include both sound and picture carriers and their audio and video information. By controlling the phase and frequency of the analog carrier signal in relation to the color subcarrier signal, and deriving the sampling signal from the analog carrier, an ease in video signal demodulation is provided.

    48.
    发明专利
    未知

    公开(公告)号:FI871785A0

    公开(公告)日:1987-04-23

    申请号:FI871785

    申请日:1987-04-23

    Applicant: RCA CORP

    Abstract: A sync separator detects, in a corresponding part of the waveform of a video signal (100), the occurrence of the trailing edge of a corresponding sync pulse, in accordance with the rate of change of the video signal. Information obtained from the sync tip and the back porch portions of the corresponding sync pulse is used for generating a slice level signal (SL). A comparator (20) responsive to the slice level signal separates a sync signal (100a) from the video signal (100).

    DIGITAL TELEVISION RECEIVERS
    49.
    发明专利

    公开(公告)号:AU560416B2

    公开(公告)日:1987-04-09

    申请号:AU1142483

    申请日:1983-02-15

    Applicant: RCA CORP

    Abstract: An analog carrier signal and its sidebands contain modulated information which is to be digitally encoded and processed. Demodulation and digital encoding is accomplished in a single process by an analog-to-digital converter, which samples the analog signals in response to a sampling signal of a frequency which is at least twice the bandwidth of the band of frequencies containing the carrier signal and its information-bearing sidebands. The analog signal samples are digitally encoded, producing a band of digital information signals corresponding to baseband signal components. When used in a television receiver to produce digital signal samples, the band of analog signals may include both sound and picture carriers and their audio and video information. By controlling the phase and frequency of the analog carrier signal in relation to the color subcarrier signal, and deriving the sampling signal from the analog carrier, an ease in video signal demodulation is provided.

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