Title :
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
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;
Conference_Titel :
Electronic System Design (ISED), 2012 International Symposium on
Conference_Location :
Kolkata
Print_ISBN :
978-1-4673-4704-4
DOI :
10.1109/ISED.2012.44
