Differential AB class amplifier circuit and drive circuit...

Details Differential AB class amplifier circuit and drive circuit... Differential AB class amplifier circuit and drive circuit...

2007-01-30

2007-01-30

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S261000

Reexamination Certificate

active

10948438

ABSTRACT:
A drive circuit includes a plurality of differential AB class amplifier circuits and a common bias circuit. Each amplifier circuit is configured as a voltage follower to input an analog signal and drive a data line based on the input analog signal. The common bias circuit generates a first bias signal set and a second bias signal set. Each amplifier circuit includes an N-channel differential amplifier circuit, a P-channel differential amplifier circuit that operates independently from the N-channel differential amplifier circuit, and an output stage circuit. The N-channel and P-channel differential amplifier circuits input a differential signal and output first and second output signals onto first and second output lines, respectively, based on the first bias signal set. The output stage circuit generates drive signal from the first and second output signals based on the second bias signal set and outputs the drive signal onto an output terminal.

REFERENCES:
patent: 5311145 (1994-05-01), Huijsing et al.
patent: 6005440 (1999-12-01), Okamoto
patent: 6121839 (2000-09-01), Giacomini
patent: 6657495 (2003-12-01), Ivanov et al.
patent: S61-35004 (1986-08-01), None
patent: H07-142940 (1995-06-01), None
patent: H09-232883 (1997-09-01), None
patent: 2001-177352 (2001-06-01), None

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