I.sup.2 L delay circuit with phase comparator and temperature co

Details I.sup.2 L delay circuit with phase comparator and temperature co I.sup.2 L delay circuit with phase comparator and temperature co

1983-10-19

1987-03-24

Shepperd, John W.

Electrical transmission or interconnection systems

With nonswitching means responsive to external nonelectrical...

Temperature responsive

307477, 307603, 307605, 307310, 307591, 358 24, 358 31, H03L 500

Patent

active

046527788

ABSTRACT:
A delay circuit for delaying an FM video signal is disclosed. The delay circuit includes an input for supplying the FM video signal, an output for producing a delayed FM video signal, and a delay line connected between the input and output for delaying FM video signal. The delay line is defined by a plurality of I.sup.2 Ls connected in cascade. The delay circuit further includes a phase comparator provided for comparing a phase between FM video signal at the input and the delayed FM video signal at the output and for producing a difference signal representing the phase difference. The difference signal is used for changing and injection current to be applied to the I.sup.2 Ls such that the delay effected in the delay line is made substantially equal to the required delay.

REFERENCES:
patent: 4130831 (1978-12-01), Isono et al.
patent: 4393397 (1983-07-01), Holmes
patent: 4438353 (1984-03-01), Sano et al.
patent: 4489342 (1984-12-01), Gollinger et al.
William K. Hickok, "Amplitude and Phase Sensitive Comb Filter", Research Disclosure, Sep. 1978, pp. 56-57.
"VTR" Techniques, Japanese Television Institute Edition, Apr. 20, 1969, p. 27.

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