Publication detail

A 0.5-V 95-dB rail-to-rail DDA for biosignal processing

KHATEB, F. KULEJ, T. KUMNGERN, M. ARBET, D. JAIKLA, W.

Original Title

A 0.5-V 95-dB rail-to-rail DDA for biosignal processing

Type

journal article in Web of Science

Language

English

Original Abstract

This paper presents a new low-voltage CMOS structure for differential difference amplifier (DDA) optimized for low frequency biosignal processing. The DDA input stage is based on a non-tailed bulk-driven (BD) differential pair offering rail-to-rail input common mode range (ICMR) under 0.5 V voltage supply. Unlike the conventional two differential pairs DDA structure, the proposed one employs one differential pair created by the multiple input MOS transistor (MI-MOST) technique offering simple circuitry. Although the bulk-driven and the MI MOST techniques reduce the amplifier's transconductance, the gain is boosted by increasing the output resistance using a self-cascode transistor and a partial positive feedback. As a result, a 95-dB voltage gain is achieved which is larger than achieved gain for most sub-0.5 V designs presented in the literature. The DDA has 12.66 kHz gain bandwidth product, and consumes 313nW of power. The input thermal noise is 0.88 mu V/Hz1/2 and the average slew-rate is 14.7 V/ms at 20pF load capacitance. As an example of application, a band-pass filter (BPF) based on two DDAs with adjustable gain for electrocardiogram (ECG) signal processing is presented. The 0.18 mu m CMOS technology from TSMC has been used and extensive simulation results in Cadence environment including process, voltage and temperature corners and Monte-Carlo analysis have been carried-out to demonstrate the robustness of the design.

Keywords

Bulk-driven; Differential difference amplifier; Operational amplifier; Low voltage; Low power

Authors

KHATEB, F.; KULEJ, T.; KUMNGERN, M.; ARBET, D.; JAIKLA, W.

Released

1. 2. 2022

Publisher

ELSEVIER GMBH

Location

MUNICH

ISBN

1618-0399

Periodical

AEU - International Journal of Electronics and Communications

Year of study

145

Number

, IF: 3.183

State

Federal Republic of Germany

Pages from

1

Pages to

9

Pages count

9

URL

https://doi.org/10.1016/j.aeue.2021.154098

BibTex

@article{BUT178058,
  author="Fabian {Khateb} and Tomasz {Kulej} and Montree {Kumngern} and Daniel {Arbet} and Winai {Jaikla}",
  title="A 0.5-V 95-dB rail-to-rail DDA for biosignal processing",
  journal="AEU - International Journal of Electronics and Communications",
  year="2022",
  volume="145",
  number=", IF: 3.183",
  pages="1--9",
  doi="10.1016/j.aeue.2021.154098",
  issn="1618-0399",
  url="https://doi.org/10.1016/j.aeue.2021.154098"
}