Effect of Finite Gain and Bandwidth of Feed-Forward Compensated OTA on Active-RC Integrators: A Case Study

Author

Rekha, S. ; Laxminidhi, T.

Author_Institution

Dept. of E&C Eng., NITK Surathkal, Mangalore, India

fYear

2012

fDate

19-22 Dec. 2012

Firstpage

48

Lastpage

51

Abstract

This paper analyses the effect of finite gain-bandwidth of the operational transconductance amplifiers (OTAs) on active-RC integrators. A feed-forward compensated OTA is taken as the building block of active-RC integrator. A mathematical analysis is carried out on a first order low-pass active-RC filter designed in 180 nm CMOS technology to operate at a supply voltage of 0.5 V. A non-ideality factor (NIF) has been defined that accounts for the deviation of the response from the ideal. Simulations performed on the transistor level filter justifies the mathematical analysis presented.

Keywords

feedforward amplifiers; mathematical analysis; operational amplifiers; CMOS technology; active-RC integrators; feed-forward compensated OTA bandwidth; finite gain; first-order low-pass active-RC filter; mathematical analysis; nonideality factor; operational transconductance amplifiers; size 180 nm; transistor level filter; voltage 0.5 V; Feed-forward compensation; Non-ideality; OTA;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic System Design (ISED), 2012 International Symposium on

Conference_Location

Kolkata

Print_ISBN

978-1-4673-4704-4

Type

conf

DOI

10.1109/ISED.2012.44

Filename

6526551