Receiver unit having synchronous pull-in circuit

Details Receiver unit having synchronous pull-in circuit Receiver unit having synchronous pull-in circuit

1985-08-28

1986-08-19

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329110, 329126, 375 81, 375 94, 375120, 455257, H03D 300

Patent

active

046072306

ABSTRACT:
In a receiver unit, a synchronous pull-in circuit is formed. The synchronous pull-in circuit is comprised of a transversal filter having a roll-off characteristic (roll-off filter), a timing discriminator for extracting a timing signal contained in a received signal and a decision part for detecting a phase deviation between the thus extracted timing signal and an internal clock by which the receiver unit itself is synchronized. The roll-off filter is provided with a plurality of taps, the tap coefficients of which are varied in accordance with the phase deviation, so that said timing signal is synchronized with the internal clock.

REFERENCES:
patent: 4540948 (1985-09-01), Ryu
patent: 4567599 (1986-01-01), Mizoguchi

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