T.V. Integrator circuit and horizontal oscillator

Details T.V. Integrator circuit and horizontal oscillator T.V. Integrator circuit and horizontal oscillator

1982-11-19

1984-12-11

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358153, 358154, H04N 504

Patent

active

044881770

ABSTRACT:
In a T.V. integrator circuit which separates vertical and horizontal synchronization pulses, the time constants thereof are set by extracting from the integrator a current representative of a reference current which is used to trim an associated horizontal oscillator. Current mirror circuits are used to both generate the representative signal at the horizontal oscillator and to extract the representative signal at the integrator.

REFERENCES:
patent: 3639780 (1972-02-01), Lovelace
Current Mirrors Amplifiers Having Current Gains Less Influenced by the Base Currents of Component Transistors, by J. Radovsky, Technical Note, TN No. 949, Dec. 31, 1973, pp. 1-7.

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