Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1997-12-18
1999-05-04
Wong, Peter S.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 95, 363131, 363 26, 327254, H02M 112, H02M 324, H02M 3335
Patent
active
059010541
ABSTRACT:
A PWM controlling circuit includes a signal generator and two PWM controllers. The signal generator comprises an oscillator, a plurality of inverters, and two RC delay networks. The oscillator and the inverters are composed of elementary elements, respectively, such as diodes, resistors, inverters and capacitors. The PWM controlling circuit in accordance with the present invention can be implemented with low cost, and the duty cycles thereof are not limited to 50%.
REFERENCES:
patent: 4473732 (1984-09-01), Payne
Hwang Jeang
Leu Ching-Shan
Liu Wueichan
Chun-Shan Institute of Science and Technology
Patel Rajnikant B.
Pelton, Esq. William E.
Wong Peter S.
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