Capacitive load driving circuit, electrostatic transducer,...

Details Capacitive load driving circuit, electrostatic transducer,... Capacitive load driving circuit, electrostatic transducer,...

2006-11-29

2008-12-02

Suryawanshi, Suresh K (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C381S306000, C381S311000

Reexamination Certificate

active

07461281

ABSTRACT:
A capacitive load driving circuit includes an error amplification circuit that amplifies a difference between an external input signal provided to one input terminal and a negative feedback signal provided from the negative feedback circuit to another input terminal; a modulation circuit; a power switching circuit; a gate driving circuit; a low-pass filter connected to an output side of the power switching circuit and that removes switching carrier components included in an output signal of the power switching circuit; an output transformer that boosts an output signal of the low-pass filter and has a primary winding connected to an output terminal of the filter; a capacitive load that is connected in parallel with a secondary winding of the output transformer; and the negative feedback circuit performs a negative feedback from the output terminal of the low-pass filter to an input side of the error amplification circuit.

REFERENCES:
patent: 5731722 (1998-03-01), Sugiki et al.
patent: 6643377 (2003-11-01), Takahashi et al.
patent: 6807281 (2004-10-01), Sasaki et al.
patent: 7015905 (2006-03-01), Onozawa et al.
patent: 7210785 (2007-05-01), Matsuzawa et al.
patent: 7244007 (2007-07-01), Ishizaki
patent: A-2001-086587 (2001-03-01), None
patent: A-2002-158550 (2002-05-01), None

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