Amplifiers – Modulator-demodulator-type amplifier
Reexamination Certificate
2008-03-18
2008-03-18
Nguyen, Khanh Van (Department: 2817)
Amplifiers
Modulator-demodulator-type amplifier
C330S20700P, C330S251000
Reexamination Certificate
active
11307990
ABSTRACT:
An improved PWM amplifier is disclosed that uses multiple integrators in the loop filter to provide high loop gain across the frequency band-of-interest. The frequency characteristics of the loop filter are optimized to distribute large loop gains across the entire band to provide large suppression of noise and distortions generated in the modulation and output stages.
REFERENCES:
patent: 6300825 (2001-10-01), Dijkmans et al.
patent: 6362683 (2002-03-01), Miao et al.
patent: 6577186 (2003-06-01), Berkhout
ASP Technologies
Cody J P
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