A 0.7-V CMOS operational transconductance amplifier with bulk-driven technique

Author

Shen, Meng-Hung ; Wu, Yi-Shuan ; Ke, Guan-Hung ; Huang, Po-Chiun

Author_Institution

Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan

fYear

2010

fDate

22-23 Nov. 2010

Firstpage

392

Lastpage

395

Abstract

This paper presents a two-stage pseudo-differential amplifier. Rail-to-rail operations are achieved by using bulk terminals as the inputs. The positive feedback technique is used to enhance the transconductance with negative conductance. The bulk terminals of all transistors are carefully biased to lower their threshold voltages (V_th) and maximize signal swing. Using a standard 0.18-μm CMOS technology, measurement results demonstrate that gain-bandwidth product is 0.97MHz. The settling time for a 0.7-V_pp step is 2.1/μS. The input referred noise is 0.14mV at 1MHz. All the circuits dissipate 0.107μW under a single 0.7-V power supply.

Keywords

CMOS analogue integrated circuits; differential amplifiers; operational amplifiers; CMOS; bandwidth 0.97 MHz; bulk-driven technique; frequency 1 MHz; operational transconductance amplifier; positive feedback technique; pseudo-differential amplifier; rail-to-rail operation; size 0.18 micron; threshold voltage; voltage 0.14 mV; voltage 0.7 V; CMOS integrated circuits; CMOS technology; amplifiers; bulk-input; low voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

SoC Design Conference (ISOCC), 2010 International

Conference_Location

Seoul

Print_ISBN

978-1-4244-8633-5

Type

conf

DOI

10.1109/SOCDC.2010.5682887

Filename

5682887