High output current buffer

Details High output current buffer High output current buffer

2006-01-10

2008-08-12

Pascal, Robert J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

C330S264000

Reexamination Certificate

active

07411455

ABSTRACT:
A bipolar high output current buffer is disclosed using a negative feedback current mirror to supply the base drive to an output transistor. Small quiescent currents are used wherein the buffer demonstrates low quiescent power dissipation. The current mirror supplies the incremental base drive to the output transistor to support high output currents. When the output drive may source or sink the high output currents, two current mirrors may be used, one for each of the source and the sinking circuitry. This invention provides for minimal loss of dynamic range.

REFERENCES:
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patent: 5216291 (1993-06-01), Seevinck et al.
patent: 5278516 (1994-01-01), Sakurai
patent: 6429744 (2002-08-01), Murray et al.
patent: 6501334 (2002-12-01), Corsi et al.
patent: 6504419 (2003-01-01), Damitio et al.
patent: 6535064 (2003-03-01), Harvey
patent: 6538514 (2003-03-01), Harvey
patent: 6586997 (2003-07-01), D'Aquino et al.
patent: 6762646 (2004-07-01), Bell

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