Control circuit for calibrating a delay line

Details Control circuit for calibrating a delay line Control circuit for calibrating a delay line

1986-12-08

1989-02-14

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358139, 358148, H04N 514

Patent

active

048050210

ABSTRACT:
Control circuit for calibrating a delay line for a television receiver. The delay line contains series-connected all-pass sections of at least 2nd-order, the inductances of which are replaced by gyrators to which capacitances are connected. During at least one line of the vertical blanking period, the delay line is included into a phase-lock loop for comparison with a line-frequency signal in order to control the delay time of the all-pass sections.

REFERENCES:
patent: 4489342 (1984-12-01), Gollinger et al.
Achterberg et al., "Versteilerung von Farbsignalsprungen und Leuchtchichtesignal-Verzogerung mit der Schaltung TDA 4560", Valvo Technical Information 840228, pp. 1-13.

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