Amplifying circuit, noise reducing apparatus and power...

Details Amplifying circuit, noise reducing apparatus and power... Amplifying circuit, noise reducing apparatus and power...

2006-05-30

2006-05-30

Mottola, Steven J. (Department: 2817)

Electrical transmission or interconnection systems

With harmonic filter or neutralizer

Reexamination Certificate

active

07053505

ABSTRACT:
An amplifying circuit, which generates a compensation current based on a detection result of a leakage current flowing between an AC power source for supplying power and a power converting circuit section, includes a main amplifier having transistors and a correction amplifier connected in parallel to the main amplifier. Capacitors are connected between each base of transistors, forming the main amplifier and the correction amplifier, and a ground line, and between an output terminal of the correction amplifier and the ground line, respectively, and an impedance ratio of these capacitors is adjusted, thereby adjusting an amplification ratio.

REFERENCES:
patent: 6134126 (2000-10-01), Ikekame et al.
patent: 6459597 (2002-10-01), Igarashi et al.
patent: 9-266677 (1997-10-01), None
patent: 2003-250269 (2003-09-01), None
patent: 2003-250270 (2003-09-01), None

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