Digital sine-cosine generator

Details Digital sine-cosine generator Digital sine-cosine generator

1983-01-03

1985-11-05

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328 25, 328 27, 307261, H03K 500, H03B 1900

Patent

active

045516820

ABSTRACT:
A solid-state, digital logic, sine-cosine generator is provided for use in color television signal generators which contributes little or no phase shift or drift, whereby an input frequency of four times the color burst rate is used, and a first divide by two shift register operates upon that input signal frequency while a second divide by two shift register is used to obtain the proper color burst frequency as well as the 90.degree. relationship for the sine and cosine signals; a series of integrators then converts the digital "square" waves to triangular and then sinusoidal signals.

REFERENCES:
patent: 3512092 (1970-05-01), Thurnell
patent: 3649923 (1972-03-01), Venturini
patent: 3657657 (1972-04-01), Jefferson
patent: 3671871 (1972-06-01), Malm
patent: 3873928 (1975-03-01), Lafuze
patent: 3995222 (1976-11-01), Mitarai
patent: 4152698 (1979-05-01), van Deusen
patent: 4328554 (1982-05-01), Mantione

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