A low-power, high-speed, current-feedback op-amp with a novel Class AB high current output stage

Author

Bales, Jim

Author_Institution

Nat. Semicond. Corp., Fort Collins, CO, USA

Volume

32

Issue

9

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

1470

Lastpage

1474

Abstract

A complementary bipolar low-power, high-speed, current-feedback operational amplifier is described. The amplifier incorporates a new Class AB output stage that enables high output current drive of 100 mA and large voltage swing within 1 V of the supply rails while operating at low quiescent current of 1.5 mA. The amplifier was fabricated in a junction-isolated complementary bipolar process with NPN/PNP f_t of 4.5/3.8 GHz. The amplifier, configured for noninverting gain of two and 100-Ω load, provides 3-dB bandwidth of 110 MHz and 2-V pulse rise time of 7 ns

Keywords

bipolar analogue integrated circuits; feedback amplifiers; integrated circuit design; operational amplifiers; 1.5 mA; 100 mA; 110 MHz; 3-dB bandwidth; 3.8 GHz; 4.5 GHz; 7 ns; Class AB high current output stage; complementary bipolar IC; current-feedback op-amp; junction-isolated complementary bipolar process; noninverting gain; output current drive; pulse rise time; quiescent current; voltage swing; Analog integrated circuits; Bandwidth; Current supplies; Impedance; Mirrors; Operational amplifiers; Packaging; Pulse amplifiers; Rails; Voltage;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.628768

Filename

628768