Phase shift circuit

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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Details

328 55, 328109, 307262, 307511, H03K 513, H03K 522

Patent

active

049357018

ABSTRACT:
A phase shift circuit used in a regenerating repeater, includes a separating unit for separating an input signal into two separate signals having a phase difference of a phase angle of 90.degree. therebetween, one separated signal having a "0" phase and the other separated signal having a ".pi./2" phase. A distributing unit distributes the "0" phase separated signal and ".pi./2" phase separated signal as three distributed signals having phase difference of phase angles of 90.degree. and 180.degree. therebetween, one distributed signal having a "0" phase and the others being a ".pi./2" phase distributed signal and a ".pi." phase distributed signal. A weighting/compounding unit analyzes the "0" phase distributed signal, ".pi./2" phase distributed signal, and ".pi." phase distributed signal regarding a plurality of phase signals each having a phase shift extent, compounds each of the phase signals after being weighted by each amplitude, the weighting being performed by a weight control signal applied from an external stage, and generates an output signal adding a phase shift proportional to the weight to the input signal.

REFERENCES:
patent: 4052679 (1977-10-01), Hosoya
patent: 4297641 (1981-10-01), Sterzer
patent: 4395687 (1983-07-01), Belohoubek
patent: 4709170 (1987-11-01), Li
patent: 4739279 (1988-04-01), Pion
Charles R. Hogge, "A Self Correcting Clock Recovery Circuit", pp. 1312-1314, Journal of Lightwave Technology, vol. LT-3, No. 6, Dec. 1985.

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