Electricity: power supply or regulation systems – For phase shift or control – Using a three or more terminal semiconductive device
Patent
1995-03-22
1996-06-18
Nyugen, Matthew V.
Electricity: power supply or regulation systems
For phase shift or control
Using a three or more terminal semiconductive device
323212, G05F 100
Patent
active
055281249
ABSTRACT:
A phase control circuit for operating a phase shift in accordance with a control voltage comprises four differential circuits, two of which form a multiplier circuit for providing a basic function for a phase shift operation of the phase control circuit, and the rest of which cancel variations in amplitude generated during the phase shift operation. The amplitude compensation is accomplished by a construction in which a ratio of an emitter area of a first bipolar transistor in each of the differential circuits to an emitter area of the second bipolar transistor in each of the differential circuits is set at a value between 2 and 3. Alternatively, the amplitude compensation is provided by a level shift circuit providing an offset voltage in the control voltage supplied to two of the differential circuits.
REFERENCES:
patent: 3789291 (1974-07-01), Dinger et al.
patent: 4663583 (1987-05-01), Ludwick et al.
patent: 4792744 (1988-12-01), Antoine
Handbook of Semiconductor (second edition) published Jun. 30, 1981 pp. 831-835 FIGS. 11.53 11.54 11.55.
NEC Corporation
Nyugen Matthew V.
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