Operational amplifier having its compensator capacitance...

Details Operational amplifier having its compensator capacitance... Operational amplifier having its compensator capacitance...

2008-03-05

2009-11-17

Nguyen, Khanh V (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including signal feedback means

C330S051000, C330S260000

Reexamination Certificate

active

07619478

ABSTRACT:
An operational amplifier includes a differential amplifier connected between an input and an output port of the operational amplifier, a phase compensator capacitance connected between the differential amplifier and the output port, a switching transistor for controlling the connection between the phase compensator capacitance and the differential amplifier, a detection transistor responsive to a potential difference between the input and output ports to be rendered conductive, and a control transistor responsive to the detection transistor for controlling the switching transistor. The operational amplifier has its slew rate improved without detracting from stability against oscillation and continuity of the output waveform.

REFERENCES:
patent: 6753731 (2004-06-01), Maki
patent: 2006/0091955 (2006-05-01), Choi
patent: 6-164263 (1994-06-01), None
patent: 2000091857 (2000-03-01), None
patent: 2006279512 (2006-10-01), None
patent: 2006103889 (2006-10-01), None
Japanese Office Action “Notification of Reason for Refusal” Dated on Feb. 13, 2009 Patent Application No. 2007-085461; with English Translation.

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