Title:
FREQUENCY DEMODULATOR
Document Type and Number:
Japanese Patent JPS5698910
Kind Code:
A
Abstract:
A frequency demodulator circuit having an automatic gain control. The circuit will find particular use in SECAM color television receivers. The demodulator has two inputs; one receives alternately the reference frequency (during a sampling interval) and the frequency to be demodulated (between the sampling intervals). The other input receives a voltage for correcting the slope of the demodulator. The correcting signal is updated during each sampling and is provided by a feedback loop from the output of the demodulator, a reference frequency, and a reference voltage.
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Inventors:
FURANSOWA BUAN ZANTAN
Application Number:
JP18026480A
Publication Date:
August 08, 1981
Filing Date:
December 18, 1980
Export Citation:
Assignee:
THOMSON CSF
International Classes:
H03D3/24; H04N9/64; H03D3/00; H04N11/18; (IPC1-7): H03D3/00; H04N9/50