Rail-to-rail differential input amplification stage with main and surrogate differential pairs
Patent
·
OSTI ID:1176132
An operational amplifier input stage provides a symmetrical rail-to-rail input common-mode voltage without turning off either pair of complementary differential input transistors. Secondary, or surrogate, transistor pairs assume the function of the complementary differential transistors. The circuit also maintains essentially constant transconductance, constant slew rate, and constant signal-path supply current as it provides rail-to-rail operation.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- Assignee:
- UT-Battelle, LLC (Oak Ridge, TN)
- Patent Number(s):
- 7,187,236
- Application Number:
- 10/935,525
- OSTI ID:
- 1176132
- Resource Relation:
- Patent File Date: 2004 Sep 07
- Country of Publication:
- United States
- Language:
- English
Design techniques for cascoded CMOS op amps with improved PSRR and common-mode input range
|
journal | December 1984 |
Constant-g/sub m/ rail-to-rail CMOS op-amp input stage with overlapped transition regions
|
journal | January 1999 |
1-V rail-to-rail operational amplifiers in standard CMOS technology
|
journal | January 2000 |
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