Power amplifier and method for reducing common noise of...

Details Power amplifier and method for reducing common noise of... Power amplifier and method for reducing common noise of...

2007-10-23

2009-06-16

Nguyen, Patricia (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S149000, C330S251000, C330S20700P

Reexamination Certificate

active

07548110

ABSTRACT:
A power amplifier including a delta-sigma modulation module, a differential programmable dead-time-control module, and an output stage module is provided. The delta-sigma modulation module integrates and quantizes an error between a differential-mode input signal and an output signal to generate a first and a second mean signal. The differential programmable dead-time-control module includes a first and a second dead-time-control module which respectively generate a first and a second signal corresponding to the first mean signal and a third and a fourth signals corresponding to the second mean signal through logic calculations. The differential programmable dead-time-control module determines a dead time between the first signal and the second signal according to a first control signal and a dead time between the third signal and the fourth signal according to a second control signal. The output stage module generates the output signal according to the first, second, third, and fourth signal.

REFERENCES:
patent: 6414614 (2002-07-01), Melanson
patent: 6924757 (2005-08-01), Adams et al.
patent: 6998910 (2006-02-01), Hezar et al.
patent: 7071752 (2006-07-01), Kowkutla et al.
patent: 7078963 (2006-07-01), Andersen et al.
patent: 7078964 (2006-07-01), Risbo et al.
patent: 7084799 (2006-08-01), Butler
patent: 2005/0110667 (2005-05-01), Borisavljevic

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