SECAM Modulator

Details SECAM Modulator SECAM Modulator

1982-07-02

1985-07-09

LaRoche, Eugene R.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

331 17, 331 34, 455113, H03C 300

Patent

active

045285276

ABSTRACT:
A SECAM modulator has a frequency control loop for maintaining constant average frequency of a VCO during a scanning line. However, this can cause varying deviation of the VCO. Therefore a second control loop is provided to control the voltage of the VCO to maintain constant voltage-to-frequency gain.

REFERENCES:
patent: 3579281 (1971-05-01), Kam et al.
patent: 4107624 (1978-08-01), Turner
patent: 4336508 (1982-06-01), Cole et al.

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