Design of a high performance, low power, fully differential telescopic cascode amplifier using common-mode feedback circuit

Type :

Term papers

Pages :

4 pages

Format :

.pdf

Published date :

09/21/2009

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Summary :

 
 

Table of Contents Design of a high performance, low power, fully differential telescopic cascode amplifier using common-mode feedback circuit
 Table of Contents

 
  1. Abstract
  2. Introduction
  3. Design methodology
    1. Estimating design parameters
    2. Generating biases
    3. Sensing the common mode level (VCM)
    4. Auxiliary amplifier
    5. Return mechanism
  4. Results of design methodology
  5. Conclusion
  6. Bibliography

Abstract

high gain differential amplifier is ubiquitous in today's analog circuits owing to its improved immunity to noise, larger output swings and reduced distortion. In particular, an amplifier with high speed and low power dissipation has high utility in various applications like ADCs and DACs. However, the design of a fully differential telescopic amplifier is complicated as the DC level of its output is not well defined. One of the reasons for this is the current mismatch [1] between p-channel and n-channel MOSFET's used in the amplifier. To solve this problem and to clearly define the DC common mode level at the output node a CMFB circuit is inevitably needed.

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About the author :

pencil image Vijay P. Director of Shri HDG MBA College
Level :General public Study : Management School/University : Saurashtra University

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