Publication detail

0.5-V High Linear Fully Differential Multiple-Input Bulk-Driven OTA With Effective Self-Embedded CMFB

KHATEB, F. KULEJ, T. KUMNGERN, M. PROMMEE, P.

Original Title

0.5-V High Linear Fully Differential Multiple-Input Bulk-Driven OTA With Effective Self-Embedded CMFB

Type

journal article in Web of Science

Language

English

Original Abstract

This paper presents a new fully differential multiple-input operational transconductance amplifier (FD MI-OTA) with an effective self-embedded common-mode feedback circuit (CMFB). The circuit employs several design techniques to extend the linearity to the rail-to-rail level, such as a bulk-driven, multiple-input capacitive voltage divider and source degeneration. The circuit uses self-cascode transistors to increase the gain of the OTA from one side and to create a common-mode feedback circuit, needed to control the common-mode output voltage from the other side. Thus, the CMFB is part of the OTA and as a result, its chip area and power consumption remain unchanged. The performance of the proposed circuit was simulated using TSMC's CMOS $0.18 \, \mu \text{m}$ process in the Cadence Virtuoso System Design Platform to validate the performance of the topology. Intensive simulation results based on Monte Carlo and process, voltage, temperature corners were performed to confirm the OTA's performance and the robustness of the CMFB. The circuit operates with a supply voltage of 0.5 V and consumes 17.5nW of power, making it suitable for applications with extremely low voltage supply and low frequency. As an application, a second-order low-pass filter was designed based on the proposed FD MI-OTA.

Keywords

Transistors; Transconductance; Voltage control; Resistors; Capacitors; Threshold voltage; Resistance; Amplifiers; Universal filter; voltage-mode circuit; operational transconductance amplifier

Authors

KHATEB, F.; KULEJ, T.; KUMNGERN, M.; PROMMEE, P.

Released

6. 5. 2024

Publisher

IEEE

Location

PISCATAWAY

ISBN

2169-3536

Periodical

IEEE Access

Year of study

12

Number

1

State

United States of America

Pages from

58338

Pages to

58348

Pages count

11

URL

https://ieeexplore.ieee.org/document/10500360

Full text in the Digital Library

http://hdl.handle.net/11012/245349

BibTex

@article{BUT188533,
  author="Fabian {Khateb} and Tomasz {Kulej} and Montree {Kumngern} and Pipat {Prommee}",
  title="0.5-V High Linear Fully Differential Multiple-Input Bulk-Driven OTA With Effective Self-Embedded CMFB",
  journal="IEEE Access",
  year="2024",
  volume="12",
  number="1",
  pages="58338--58348",
  doi="10.1109/ACCESS.2024.3389060",
  issn="2169-3536",
  url="https://ieeexplore.ieee.org/document/10500360"
}

Documents

0.5-V_High_Linear_Fully_Differential_Multiple-Input_Bulk-Driven_OTA_With_Effective_Self-Embedded_CMFB.pdf