Design and analysis of a two-stage OTA for sensor interface circuit

Author

Baharudin, Siti Nur Syuhadah ; Jambek, Asral Bahari ; Ismail, R.C.

Author_Institution

Sch. of Microelectron. Eng., Univ. Malaysia Perlis, Arau, Malaysia

fYear

2014

fDate

7-8 April 2014

Firstpage

88

Lastpage

92

Abstract

This paper discusses the design of an operational transconductance amplifier (OTA) circuit foruse in a capacitive sensor interface circuit. The OTA converts a differential voltage input into the current as part of a switched capacitor integrator module. In this paper, a two-stage OTA is proposed which has high gain, high output swing and low noise. The circuit was implemented using 0.13μm Silterra CMOS technology and simulated using the Mentor Graphic Design Architect software package. The results show that the OTA is able to achieve 74dB gain and 20KHz bandwidth when operated using a 2.5V power supply, with a total power consumption of 1.3mW.

Keywords

CMOS analogue integrated circuits; capacitive sensors; operational amplifiers; Mentor Graphic Design Architect software package; Silterra CMOS technology; bandwidth 20 kHz; capacitive sensor interface circuit; differential voltage input; gain 74 dB; operational transconductance amplifier; power 1.3 mW; size 0.13 mum; switched capacitor integrator module; two-stage OTA circuit; voltage 2.5 V; CMOS integrated circuits; CMOS technology; Capacitors; Gain; Topology; Transconductance; Transistors; Capacitive sensor interface circuit; Operational transconductance amplifier (OTA); Two-stage amplifier;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Applications and Industrial Electronics (ISCAIE), 2014 IEEE Symposium on

Conference_Location

Penang

Print_ISBN

978-1-4799-4352-4

Type

conf

DOI

10.1109/ISCAIE.2014.7010215

Filename

7010215