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Comments on "Improved Accuracy Pseudo-Exponential Function Generator With Applications in Analog Signal Processing"

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Title Comments on "Improved Accuracy Pseudo-Exponential Function Generator With Applications in Analog Signal Processing"
 
Creator KARANJKAR, NV
SAHOO, RR
BAGHINI, MS
 
Subject analog signal processing
cmos analog integrated circuits
current-squaring circuit
 
Description Recently a new CMOS current-mode pseudo-exponential function generator circuit was reported by Popa. The entire analysis and exponential function generator circuit, given in Popa's paper, is based on a current-squaring circuit module. In this comment paper we show that the current-squarer circuit, presented in Popa's paper, does not work as a current squarer. Consequently the pseudo-exponential generator also does not work as described in Popa's paper. We present a detailed mathematical analysis in this paper to derive its actual operation. Simulation results of the circuit module using Mentor Graphics custom IC design tool set, in a TSMC 0.18-mu m CMOS process, are also shown in this paper. Simulation results match the behavior predicted by mathematical analysis.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2011-07-31T22:30:05Z
2011-12-26T12:53:10Z
2011-12-27T05:40:22Z
2011-07-31T22:30:05Z
2011-12-26T12:53:10Z
2011-12-27T05:40:22Z
2010
 
Type Article
 
Identifier IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, 18(9), 1381-1383
1063-8210
http://dx.doi.org/10.1109/TVLSI.2009.2023546
http://dspace.library.iitb.ac.in/xmlui/handle/10054/8259
http://hdl.handle.net/10054/8259
 
Language en