Publication detail

A Rail-to-Rail Transconductance Amplifier Based on Current Generator Circuits

AKBARI, M. MAWLOOD HUSSEIN S. HASHIM Y. KHATEB, F. KEA-TIONG, T.

Original Title

A Rail-to-Rail Transconductance Amplifier Based on Current Generator Circuits

Type

journal article in Web of Science

Language

English

Original Abstract

In this brief, two current generator circuits are used to design a self-biasing transconductance amplifier. The current generators are configured using two n-channel and p-channel cascode current mirrors by which a high input dynamic range is achieved. Since such a topology creates positive feedback, the transconductance of the circuit is also increased causing higher performance. To ensure the stability of the circuit, constant current sources can be paralleled with the current mirror topologies, which of course are implemented using input drivers. Therefore, two n-channel and p-channel input differential pairs are added to the current generator circuits by which not only a rail-to-rail operation is achieved but also the amplifier is stabilized. The proposed circuit was fabricated in the TSMC 0.18-mu m CMOS process with a silicon area of 54.1 x 71 mu m. Under a 1.8-V supply voltage, the experimental results showed a high input common-mode range (ICMR), while a gain bandwidth (GBW) of 83.9 MHz was measured for a capacitive load of 2 x 6 pF. In addition, a dc gain and a slew rate (SR) of 68.4 dB and 71.7 V/mu s, respectively, were achieved.

Keywords

Transconductance; Topology; Current mirrors; Transconductors; Generators; Transistors; Rail to rail amplifiers; Amplifier; current generator; current mirror; operational transconductance amplifier (OTA); rail-to-rail; self-biasing

Authors

AKBARI, M.; MAWLOOD HUSSEIN S.; HASHIM Y.; KHATEB, F.; KEA-TIONG, T.

Released

26. 7. 2023

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Location

PISCATAWAY

ISBN

1557-9999

Periodical

IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS

Year of study

31

Number

10

State

United States of America

Pages from

1624

Pages to

1628

Pages count

5

URL

https://doi.org/10.1109/TVLSI.2023.3285823

BibTex

@article{BUT184976,
  author="AKBARI, M. and MAWLOOD HUSSEIN S. and HASHIM Y. and KHATEB, F. and KEA-TIONG, T.",
  title="A Rail-to-Rail Transconductance Amplifier Based on Current Generator Circuits",
  journal="IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS",
  year="2023",
  volume="31",
  number="10",
  pages="1624--1628",
  doi="10.1109/TVLSI.2023.3285823",
  issn="1557-9999",
  url="https://doi.org/10.1109/TVLSI.2023.3285823"
}