Cart (Loading....) | Create Account
Close category search window

A rail-to-rail, constant gain, buffered op-amp for real time video applications

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Moldovan, L. ; Dept. of Comput. Sci., Texas Tech. Univ., Lubbock, TX, USA ; Li, H.H.

Inspired by Hogervorst et al's current switch idea, a buffered output stage operational amplifier was designed, which has high frequency, high dc gain, and rail-to-rail constant transconductance (G m). This operational amplifier is the output stage of an analog/digital system which implements a Gabor convolution for real-time dynamic image processing and it is designed to interface the external analog-to-digital converter (ADC) with a very heavy load. The op amp was fabricated by the MOSIS service in a 2-μm, n-well CMOS, double polysilicon, double metal technology. The fabricated circuit operates from a single 5 V power supply and dissipates 10 mW. The open loop-gain of the fabricated circuit, Avol, was measured as 67.2 dB for a 163 Ω||33 pF load. Other dc and ac characteristics were measured for a 50 Ω||33 pF load. The unify gain-bandwidth (GBW) was measured to be 11.4 MHz, the rising slew rate (SR+) 20.4 V/μs, the falling slew rate (SR-) 18.8 V/μs, and the offset voltage (Voff) 1 mV. The output swings with an amplitude of 3.24 V between 0.88 V and 4.12 V, which matches the input signal specifications of the ADC. In addition to rail-to-rail output voltage swing, the opamp has a constant Gm over the whole common mode (CM) voltage range

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:32 ,  Issue: 2 )

Date of Publication:

Feb 1997

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.