Rail-to-rail differential input amplification stage with...

Details Rail-to-rail differential input amplification stage with... Rail-to-rail differential input amplification stage with...

2007-03-06

2007-03-06

Shingleton, Michael B. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S069000, C330S260000, C330S311000, C330S291000, C330S12400D, C327S560000, C327S563000, C327S594000

Reexamination Certificate

active

10935525

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.

REFERENCES:
patent: 5006817 (1991-04-01), Babanezhad et al.
patent: 5550510 (1996-08-01), Nagaraj
patent: 5631607 (1997-05-01), Huijsing et al.
patent: 5734297 (1998-03-01), Huijsing et al.
patent: 5745007 (1998-04-01), Redman-White
patent: 5986502 (1999-11-01), Nakamura
patent: 6825721 (2004-11-01), Sanchez et al.
Ribner, et al., IEEE Journal of Solid State Circuits, 1984, pp. 919-925, vol. SC-19, No. 6.
Wang, et al., IEEE Journal of Solid State Circuits, 1999, pp. 148-156, vol. 34, No. 2.
Duque-Carrillo, et al., IEEE Journal of Solid State Circuits, 2000, pp. 33-43, vol. 35, No. 1.

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