A Compact Low Voltage CMOS Exponential Current-to-Voltage Converter Free from Transconductance Parameter Matching between NMOS and PMOS

Makoto YAMAGUCHI  Akira HYOGO  Keitaro SEKINE  

IEICE TRANSACTIONS on Electronics   Vol.E87-C   No.6   pp.1033-1036
Publication Date: 2004/06/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Analog Circuit and Device Technologies)
exponential circuit,  automatic gain control,  variable gain amplifier,  

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A compact low-voltage CMOS exponential current-to-voltage converter free from transconductance parameter matching between NMOS and PMOS is proposed. The circuit is composed of level shift circuits and current mirrors. The SPICE simulation results show a 27 dB linear range with a linearity error of less than 1 dB.