Amplifier

Details Amplifier Amplifier

2007-01-29

2008-11-11

Mottola, Steven J (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

C330S20700P

Reexamination Certificate

active

07449948

ABSTRACT:
PWM signals having different polarities input from a +IN terminal and a −IN terminal are output to a pre-driver and a switching signal generation circuit. The pre-driver outputs to switches a gate signal for actuating a driver obtained from the input PWM signal. The switching signal generation circuit inputs a PWM signal and outputs switching signals. A switching circuit, on input of the switching signals, changes over switches so that the gate signal is output to a first P-channel MOS transistor and a first N-channel MOS transistor in case the PWM signal is input from the +IN side, and to a second P-channel MOS transistor and a second N-channel MOS transistor in case the PWM signal is input from the −IN side.

REFERENCES:
patent: 6727748 (2004-04-01), Kuo
patent: 6727752 (2004-04-01), Skinner et al.
patent: 2005/0156665 (2005-07-01), Maejima
patent: 6-152268 (1994-05-01), None

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