Voltage-controlled phase shifter

Details Voltage-controlled phase shifter Voltage-controlled phase shifter

1997-11-26

1999-08-17

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

327251, 327252, 327237, 327234, H03F 345

Patent

active

059399171

ABSTRACT:
The present invention relates to a voltage-controlled phase shifter including two differential stages, each including a biasing branch and output branches coupled with the output branches of the other stage; two first resistors coupling the output branches to a first supply potential; a first capacitor connected between the output branches; two second resistors connected in series between the biasing branches; a second capacitor connected in series between the two second resistors; means for applying an input signal in the form of a differential current across the second capacitor; and means for supplying, as an output signal, the sum of the current in one of the first resistors and of a predetermined fraction of a corresponding component of the differential current constituting the input signal.

REFERENCES:
patent: 4058771 (1977-11-01), Ohsawa
patent: 4617523 (1986-10-01), Taylor
patent: 4663594 (1987-05-01), Perkins
French Preliminary Search Report from 9614900, filed Nov. 29, 1996.
Ein Integrierte Synchrondemodulatorkombination fur Farbfernsehempfanger, Pech, Valvo Berichte, vol. 18, No. 1/02, Apr. 1994, pp. 15-28.

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