Pseudo differential operational transconductance amplifier using common mode feed forward and HD3 feed forward

Author

Chang, Yen-Shuo ; Wu, Hong-Chong ; Shiau, Miin-Shyue ; Liu, Don-Gey ; Hsu, Heng-Shou

Author_Institution

Grad. Inst. of Electron. Eng., Feng Chia Univ., Taichung, Taiwan

fYear

2011

fDate

12-14 Dec. 2011

Firstpage

250

Lastpage

253

Abstract

In this study a low supply voltage CMOS pseudo differential operational trans conductance amplifier (OTA) with CMFF and HD3-FF to improve CMRR and THD is proposed. Common mode rejection ratio (CMRR) is improved by using the common mode feed forward (CMFF) technology and the THD is simulated result of improved by using a HD3 feed forward (HD3-FF). The proposed OTA shown the CMRR is 68.6dB and the THD is lower than -66dB under the input voltage range of 0.1V with 1.2V supply voltage. The chip has been manufactured in a 0.18 μm-CMOS technology and the chip area is 0.69×0.38 mm².

Keywords

CMOS integrated circuits; differential amplifiers; low-power electronics; operational amplifiers; HD3 feed forward; common mode feed forward; common mode rejection ratio; low supply voltage CMOS; pseudo differential operational transconductance amplifier; size 0.18 mum; voltage 0.1 V; voltage 1.2 V; Circuits and systems; Feeds; Harmonic distortion; Impedance; Linearity; Power harmonic filters; Transconductance; CMFF; CMRR; OTA; pseudo differential;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits (ISIC), 2011 13th International Symposium on

Conference_Location

Singapore

Print_ISBN

978-1-61284-863-1

Type

conf

DOI

10.1109/ISICir.2011.6131943

Filename

6131943