CMOS Current-Mode Companding Divider

Kuo-Jen LIN  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E92-C    No.3    pp.380-382
Publication Date: 2009/03/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E92.C.380
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Electronic Circuits
Keyword: 
Taylor series approximation,  current-mode divider,  companding,  log-domain,  

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Summary: 
A CMOS current-mode companding divider is presented. Currents of both dividend and divisor are compressed into log-domain. Then the logarithm current of divisor is subtracted from the logarithm current of dividend. After expanding the subtraction result, the division function could be achieved. The simulation results indicate that the proposed divider has with good performance at only 1.8 V supply voltage.