Class AB output stage and method for providing wide supply...

Details Class AB output stage and method for providing wide supply... Class AB output stage and method for providing wide supply...

2007-05-21

2008-12-16

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

C330S269000

Reexamination Certificate

active

07466201

ABSTRACT:
A class AB output stage includes first (MP) and a second (MN) output transistors having sources coupled to first (VDD) and second reference voltages, respectively, drains coupled to an output (13), and gates coupled to first (11A) and second (12A) conductors, respectively. Portions of first (IIN1) and a second (IIN2) input currents are sourced via a first input conductor (11) and a second input conductor (12), respectively, into and from sources of first (M2) and second (M4) transistors, respectively. Gates of the first (M2) and second (M4) transistors are coupled to the first and second conductors, respectively. First (VrefP) and second (VrefN) bias voltages are applied to gates of third (M1) and fourth (M3) transistors respectively, having sources coupled to the first and second input conductors, respectively, and drains coupled to the second conductor.

REFERENCES:
patent: 4038607 (1977-07-01), Schade, Jr.
patent: 5754078 (1998-05-01), Tamagawa
patent: 5900783 (1999-05-01), Dasgupta
patent: 6657495 (2003-12-01), Ivanov et al.
patent: 6696895 (2004-02-01), Tsukuda
patent: 6784739 (2004-08-01), Reffay et al.
patent: 7088182 (2006-08-01), Ivanov

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