Static information storage and retrieval – Powering – Data preservation
Reexamination Certificate
2006-12-19
2006-12-19
Phung, Anh (Department: 2824)
Static information storage and retrieval
Powering
Data preservation
C365S226000
Reexamination Certificate
active
07151708
ABSTRACT:
Deterioration in characteristics of a MOS transistor due to bias instability caused in a stand-by mode is suppressed to prevent deterioration in circuit characteristics. An operational amplifier circuit according to this invention includes MOS transistors for connection that are connected between back gates of differential MOS transistors and their sources and a MOS transistor for biasing that is connected between a power supply potential and the back gates. One of the MOS transistors for connection is a P-channel type MOS transistor having a gate to which a stand-by signal STB is applied. Another of the MOS transistors for connection is an N-channel type MOS transistor having a gate to which the reverse stand-by signal STBB is applied. And the MOS transistor for biasing is a P-channel type MOS transistor having a gate to which the reverse stand-by signal STBB is applied.
REFERENCES:
patent: 5189316 (1993-02-01), Murakami et al.
patent: 5483494 (1996-01-01), Taura
patent: 6313694 (2001-11-01), Sohn
patent: 6504784 (2003-01-01), Kokubo
patent: 10-075133 (1998-03-01), None
Hinokuma Yasuhiro
Miyashita Hiroyuki
Morrison & Foerster / LLP
Phung Anh
Sanyo Electric Co,. Ltd.
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