Amplifiers – Modulator-demodulator-type amplifier
Reexamination Certificate
2008-04-08
2008-04-08
Nguyen, Khanh Van (Department: 2817)
Amplifiers
Modulator-demodulator-type amplifier
C330S20700P
Reexamination Certificate
active
07355474
ABSTRACT:
The present invention discloses a method for reducing switching interference in a switching amplifier. The switching amplifier includes a first half circuit having a first modulator and a first driver circuit, a second half circuit having a second modulator and a second driver circuit, a first reference wave generator for a first reference wave, and a second reference wave generator for a second reference wave. A first input signal and a second input signal are inputted to the first modulator and the second modulator, respectively. A first modulated signal and a second modulated signal are generated and inputted to the first driver circuit and second driver circuit, respectively. There is a time delay between the switching points, wherein the time delay is large enough to avoid mutual interference. Therefore, distortion of the output signal can be eliminated while the input signals are small.
REFERENCES:
patent: 6262632 (2001-07-01), Corsi et al.
patent: 7167046 (2007-01-01), Maejima
patent: 2007/0109049 (2007-05-01), Wu
Chang Ming Hung
Chen Fu Yuan
Anpec Electronics Corporation
Egbert Law Offices
Nguyen Khanh Van
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