Title :
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
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;
Conference_Titel :
Computer Applications and Industrial Electronics (ISCAIE), 2014 IEEE Symposium on
Conference_Location :
Penang
Print_ISBN :
978-1-4799-4352-4
DOI :
10.1109/ISCAIE.2014.7010215
