Systems and methods for driving an output transistor

Details Systems and methods for driving an output transistor Systems and methods for driving an output transistor

2005-05-09

2008-03-11

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including class d amplifier

Reexamination Certificate

active

07342447

ABSTRACT:
A system and method is provided for driving an output transistor. The system and method employ a sense control to adjust a drive strength associated with driving the output transistor. The sense control measures an output parameter of the transistor, and adjusts the drive strength based on the measured parameter. The drive strength can be based on a selected driver of a plurality of driver devices with varying drive strengths or selected output devices of a driver of a plurality of output devices of varying drive strengths. The drive strength of the driver devices or output devices can be varied by varying the channel widths of output drive devices selectively coupled to a drive terminal (e.g., gate, base) of the output transistor.

REFERENCES:
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patent: 5138177 (1992-08-01), Morgan et al.
patent: 6753734 (2004-06-01), Arell et al.
patent: 6762614 (2004-07-01), Rearick et al.
patent: 6788150 (2004-09-01), Joly et al.
patent: 6859059 (2005-02-01), Rohrbaugh et al.
patent: 7129740 (2006-10-01), Pentakota et al.

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