Amplifier current drive reversal

Details Amplifier current drive reversal Amplifier current drive reversal

2009-04-17

2010-10-26

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

C330S20700P

Reexamination Certificate

active

07821338

ABSTRACT:
A drive current direction between first and second amplifiers can be selected using a received indication of an output current in an at least partially reactive load, and an amplified output signal can be produced using the selected drive current direction and the first and second amplifiers. Further, the first and second amplifiers can be configured to alternate between a pull-up mode and a pull-down mode, each amplifying half of a full wave output signal.

REFERENCES:
patent: 4330756 (1982-05-01), Moreau
patent: 5898342 (1999-04-01), Bell
patent: 6724830 (2004-04-01), Do et al.
patent: 7031457 (2006-04-01), Melsa
patent: 7167046 (2007-01-01), Maejima
patent: 7570118 (2009-08-01), Gaboriau et al.

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