Video signal peaking circuit

CAFC
  • US 5,847,774 A
  • Filed: 03/20/1997
  • Issued: 12/08/1998
  • Est. Priority Date: 10/29/1996
  • Status: Expired due to Term
First Claim
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1. A circuit for peaking video signals, said circuit comprising:

  • a delay section for delaying a luminance signal for a first predetermined time in order to generate a first delayed signal and for delaying the first delayed signal for a second predetermined time in order to generate a second delayed signal;

    an adder for adding the second delayed signal to a current video signal in order to generate an added signal;

    a variable amplifying section for amplifying the added signal in response to a first control signal from an exterior in order to generate a first variable amplified signal, and amplifying the added signal in response to a second control signal from the exterior in order to generate a second variable amplified signal;

    a selecting section for comparing the added signal from said adder with a reference signal, and for selecting the first amplified signal or the second amplified signal according to the comparison result; and

    a subtracter for subtracting the first amplified signal or the second amplified signal from said select section from the first delayed signal from said delay section in order to generate a subtracted signal as a peaked video signal.

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