Full swing amplifying circuit and applications thereof

Details Full swing amplifying circuit and applications thereof Full swing amplifying circuit and applications thereof

2008-01-22

2008-01-22

Choe, Henry (Department: 2817)

Amplifiers

With periodic switching input-output

C327S124000

Reexamination Certificate

active

07321261

ABSTRACT:
An amplifying circuit includes an input chopping circuit, an amplifier, and an output chopping circuit. The input chopping circuit is operably coupled to chop an input signal at a chopping rate to produce a chopped input signal. The amplifier has a first input transistor section, a second input transistor section, and a transistor load section. The first and second input transistor sections are operably coupled to receive the chopped input signal, wherein the first input transistor section amplifies the chopped input signal when the chopped input signal is in first signal level range, the second input transistor section amplifies the chopped input signal when the chopped input signal is in a second signal level range, and the first and second input transistor sections amplify the chopped input signal when the chopped input signal is in a third signal level range, wherein the transistor load section is coupled to the first and second input transistors sections to produce an amplified chopped signal. The output chopping circuit is operably coupled to chop the amplified chopped signal at the chopping rate to produce an amplified output signal.

REFERENCES:
patent: 6380801 (2002-04-01), McCartney
patent: 6911864 (2005-06-01), Bakker et al.
patent: 7224216 (2007-05-01), Thompson et al.
patent: 7233198 (2007-06-01), Niederkorn

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