A fast precision operational amplifier featuring two separate control loops

Author

Bowers, Derek F.

Author_Institution

Analog Devices Inc., San Jose, CA, USA

fYear

2014

fDate

Sept. 28 2014-Oct. 1 2014

Firstpage

72

Lastpage

75

Abstract

An operational amplifier is described which uses separate loops to control the output voltage and the error voltage between its inputs. To a large extent this architecture combines the high-speed characteristics of “current feedback” amplifiers with the low input referred errors of precision architectures. The technique has been applied to produce an amplifier with precision characteristics comparable to OP-07 type amplifiers but with over 100 times the bandwidth and slew-rate. Additionally, the power consumption has been reduced by a factor of three.

Keywords

feedback amplifiers; operational amplifiers; voltage control; OP-07 type amplifiers; current feedback amplifiers; error voltage; low input referred errors; operational amplifier; output voltage control; power consumption; precision architectures; separate control loops; Bandwidth; Capacitors; Noise; Operational amplifiers; Resistors; Topology; Transistors; Silicon bipolar; analog circuits; current feedback; operational amplifier; precision amplifier;

fLanguage

English

Publisher

ieee

Conference_Titel

Bipolar/BiCMOS Circuits and Technology Meeting (BCTM), 2014 IEEE

Conference_Location

Coronado, CA

Type

conf

DOI

10.1109/BCTM.2014.6981288

Filename

6981288