Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-06-17
1992-09-01
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307269, 328155, 331 17, H03K 513, H03K 500
Patent
active
051441560
ABSTRACT:
In a semiconductor phase synchronizing circuit, variations in specific frequency and damping factor due to unavoidable variations in manufacturing conditions are prevented so that variations in phase synchronizing characteristics from one product to another are reduced. A charge pump of the phase synchronizing circuit is provided with a proportional charging electric current source and a proportional discharging electric current source arranged to be in the form of a feedback loop and to pass to a loop filter charging/discharging electric currents which are proportional to a converted electric current (output electric current) of a V/I converting circuit. The proportional charging electric current source is a P-type MOSFET, while the proportional discharging electric current source is an N-type MOSFET. The charge pump is a current mirror circuit in front of which a current mirror circuit of the V/I converting circuit is disposed.
REFERENCES:
patent: 4523150 (1985-06-01), Hogeboom
patent: 4675617 (1987-06-01), Martin
patent: 4814726 (1989-03-01), Byrd et al.
patent: 5021749 (1991-06-01), Kasai et al.
patent: 5055803 (1991-10-01), Hietala
Miller Stanley D.
Seiko Epson Corporation
Tran Toan
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