A 100 A, 100 kHz transconductance amplifier

Author

Laug, Owen B.

Author_Institution

Electr. Div., Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA

Volume

45

Issue

2

fYear

1996

fDate

4/1/1996 12:00:00 AM

Firstpage

440

Lastpage

444

Abstract

A high-current, wide-band transconductance amplifier is described that provides an unprecedented level of output current at high frequencies with exceptional stability. It is capable of converting a signal voltage applied to its input into a ground-referenced output rms current up to 100 A over a frequency range from DC to 100 kHz with a useable frequency extending to 1 MHz. The amplifier has a 1000-W output capability ±10 V of compliance, and can deliver up to 400 A of pulsed peak-to-peak current. The amplifier design is based on the principle of paralleling a number of precision bipolar voltage-to-current converters. The design incorporates a unique ranging system controlled by opto-isolated switches, which permit a full-scale range from 5 A to 100 A. The design considerations for maintaining wide bandwidth, high output impedance, and unconditional stability for all loads are discussed

Keywords

differential amplifiers; harmonic distortion; operational amplifiers; wideband amplifiers; 100 A; 100 kHz; 1000 W; amplifier design; differential buffer amplifier; ground-referenced output; harmonic distortion; high output impedance; high-current; opto-isolated switches; parallel array; precision bipolar voltage-to-current converters; pulsed peak-to-peak current; unconditional stability; wide-band transconductance amplifier; Bandwidth; Broadband amplifiers; Control systems; Frequency conversion; Impedance; Pulse amplifiers; Stability; Switches; Transconductance; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.492763

Filename

492763