A hybrid multi-tanh bulk-driven input stage OTA for Low-THD biomedical Gm-C applications

Author

Ferreira, Luís H C ; Sonkusale, Sameer R.

Author_Institution

Syst. Eng. & Inf. Technol. Inst., Fed. Univ. of Itajuba, Itajuba, Brazil

fYear

2012

fDate

20-23 May 2012

Firstpage

838

Lastpage

841

Abstract

In this paper a hybrid multi-tanh bulk-driven input stage OTA for low total harmonic distortion (THD) biomedical G_m-C applications in weak inversion is presented. The proposed OTA was successfully simulated in an 130-nm IBM CMOS process. The simulations show an open loop gain of 46.4 dB and a unit gain frequency of 125 Hz with only 500 mV of power supply voltage and just 25 nW of power consumption. The transconductance is 24 nS with 300 mV_pp of linear input range (HD₃ ≤ - 60 dB), which is suitable for low-frequency and low-THD biomedical G_m-C applications.

Keywords

CMOS integrated circuits; biomedical electronics; harmonic distortion; low-power electronics; operational amplifiers; IBM CMOS process; biomedical G_m-C applications; frequency 125 Hz; gain 46.4 dB; hybrid multitanh bulk-driven input stage OTA; low total harmonic distortion; power 25 nW; size 130 nm; transconductance; voltage 500 mV; weak inversion; CMOS process; MOSFETs; Noise; Power supplies; Threshold voltage; Transconductance; Hybrid multi-tanh bulk-driven input stage OTA; low-power and low-THD Gm-C applications; low-voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2012 IEEE International Symposium on

Conference_Location

Seoul

ISSN

0271-4302

Print_ISBN

978-1-4673-0218-0

Type

conf

DOI

10.1109/ISCAS.2012.6272171

Filename

6272171