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Sin/cos generator implementation

  • US 5,113,361 A
  • Filed: 08/02/1990
  • Issued: 05/12/1992
  • Est. Priority Date: 08/02/1990
  • Status: Expired due to Term
First Claim
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1. A function generator for generating generally sinusoidal shaped signals in accordance with the equations:

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    space="preserve" listing-type="equation">sin (X+Y)=sin X+sin Y cos X
    
    
    space="preserve" listing-type="equation">cos (X+Y)=cos X-sin Y sin Xcomprising;

    first sin storage means for storing values of sin X;

    cos storage means for storing values of cos X;

    second sin storage means for storing values of sin Y multiplying means for receiving sin X and sin Y from said first and second sin storage means and cos X from said cos storage means and for producing products -sin Y sin X and sin Y cos X; and

    adder means for adding said products sin Y cos X to sin x and adding said products -sin Y sin X to cos X to produce sin (X+Y) and cos (X+Y).

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