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Television receiver power supply regulation responding to beam current changes

  • US 4,525,739 A
  • Filed: 03/30/1983
  • Issued: 06/25/1985
  • Est. Priority Date: 12/21/1982
  • Status: Expired due to Term
First Claim
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1. A television receiver incorporating means for providing a plurality of load circuit voltage supplies including means for deriving a high voltage level from one of said load circuit voltage supplies, said high voltage level subject to reduction in response to a receiver operating characteristic, said receiver operating characteristic also loading said one of said load circuit voltage supplies, therefore producing an ac ripple component in the voltage level of said one of said load circuit voltage supplies, said receiver comprising:

  • a deflection circuit energized by said one of said load circuit voltage supplies for providing an electron beam deflection current, the level of said current determined by the average dc level of the voltage of said one of said load circuit voltage supplies;

    control means responsive to a voltage level for controlling the operation of said voltage supply providing means in order to maintain the voltage levels of said voltage supplies substantially constant; and

    means coupling said one of said load circuit voltage supplies to said control means comprising detector means for providing a voltage level to said control means representative of the peak level of the voltage of said one of said load circuit voltage supplies, such that said average dc level of the voltage of said one of said load circuit voltage supplies decreases in response to the presence of said ac ripple component to compensate said electron beam deflection current for said reduction in said high voltage level.

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