Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1992-09-01
1994-01-04
Wambach, Margaret R.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307263, 307268, 307571, 328 34, 328 35, 328 55, 328 56, 328 59, H03K 301, H03K 512
Patent
active
052763579
ABSTRACT:
A drive circuit generates a quasi-square wave for use in switching power amplifiers by supplying square wave signals which are 180.degree. out of phase, but otherwise identical, to the respective control inputs of two switching transistors. Opposite ends of the respective controlled paths of the transistors are connected to the input of the device which is being driven. The driven device input has a capacitance associated therewith, which normally results in a voltage loss as this capacitance is alternately charged and discharged. The circuit component values are selected so that this capacitance is charged while the switching transistors have yet to reach their threshold voltages, and thus at the moment when either transistor is switched to a conducting state the voltage across that transistors controlled path will be substantially zero, and the normal switching loss, which is a product of the square of that voltage, the input capacitance of the driven device, and the operating frequency, is eliminated.
REFERENCES:
patent: 3868519 (1975-02-01), Green
patent: 4565931 (1986-01-01), Fumey
patent: 4705967 (1987-11-01), Vasile
IBM Tech Disc Bul "Single Input Driver Circuit" Danielski et al., vo. 18 No. 4 9175 pp. 1033-1034.
Broadcast Electronics, Inc.
Wambach Margaret R.
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