Phase lock loop television signal demodulator

Details Phase lock loop television signal demodulator Phase lock loop television signal demodulator

1985-09-24

1986-12-23

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329122, 358 23, 455260, 455312, H03D 324, H04N 966

Patent

active

046314873

ABSTRACT:
A phase lock loop demodulator has its loop amplifier and filter designed such that the transfer function of the amplifier and filter is optimized for the presence of sound and color subcarriers. An equalizer circuit is included in the demodulator for equalizing the demodulator response and has a transfer function which is independent of the transfer function of the loop filter and amplifier whereby to render the demodulator insensitive to small frequency errors around the subcarrier frequencies.

REFERENCES:
patent: 3626301 (1971-12-01), Develet, Jr.
Garden et al., "A Multifilter Phase-Lock Loop", IEEE Transactions on Communication Technology, vol. COM-19, No. 5, Oct. 1971, pp. 669-675.

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