MOS operational amplifier with current mirroring gain and...

Details MOS operational amplifier with current mirroring gain and... MOS operational amplifier with current mirroring gain and...

2009-07-22

2010-11-16

Nguyen, Hieu P (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S255000

Reexamination Certificate

active

07834689

ABSTRACT:
An amplifier has an input stage coupled to a current mirror for providing a first control signal. A gain boosting stage has first and second sections, each having first and second inputs and an output. The first input of the first section is coupled to the input stage. The second input of the first section is a first node between a source and a drain of a first pair of series-coupled transistors. The first input of the second section is coupled to the current mirror. The second input of the second section is a second node between a source and a drain of a second pair of series-coupled transistors. A pre-driver stage has inputs coupled to the input stage and the gain boosting stage. The pre-driver stage provides inputs to the gain boosting stage and receives outputs from the gain boosting stage prior to coupling to an output stage.

REFERENCES:
patent: 5442320 (1995-08-01), Kunst et al.
patent: 6127891 (2000-10-01), Eschauzier et al.
patent: 6150883 (2000-11-01), Ivanov
patent: 6351186 (2002-02-01), Cusinato et al.
patent: 6356153 (2002-03-01), Ivanov et al.
patent: 7310016 (2007-12-01), Chuang
patent: 7414473 (2008-08-01), Rayanakorn et al.
patent: 7714651 (2010-05-01), Bapat et al.
Sue, Wen-Whe et al.; “A High DC-Gain Folded-Cascode CMOS Operational Amplifier”; Proceedings of Southeastcon '98; Apr. 24-26, 1998; pp. 176-177; IEEE.

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