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Title: Rail-to-rail differential input amplification stage with main and surrogate differential pairs

Abstract

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.

Inventors:
;
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176132
Patent Number(s):
7,187,236
Application Number:
10/935,525
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Resource Relation:
Patent File Date: 2004 Sep 07
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Britton, Jr., Charles Lanier, and Smith, Stephen Fulton. Rail-to-rail differential input amplification stage with main and surrogate differential pairs. United States: N. p., 2007. Web.
Britton, Jr., Charles Lanier, & Smith, Stephen Fulton. Rail-to-rail differential input amplification stage with main and surrogate differential pairs. United States.
Britton, Jr., Charles Lanier, and Smith, Stephen Fulton. Tue . "Rail-to-rail differential input amplification stage with main and surrogate differential pairs". United States. https://www.osti.gov/servlets/purl/1176132.
@article{osti_1176132,
title = {Rail-to-rail differential input amplification stage with main and surrogate differential pairs},
author = {Britton, Jr., Charles Lanier and Smith, Stephen Fulton},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {3}
}

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Works referenced in this record:

Design techniques for cascoded CMOS op amps with improved PSRR and common-mode input range
journal, December 1984


1-V rail-to-rail operational amplifiers in standard CMOS technology
journal, January 2000

  • Duque-Carrillo, J. F.; Ausin, J. L.; Torelli, G.
  • IEEE Journal of Solid-State Circuits, Vol. 35, Issue 1
  • DOI: 10.1109/4.818918