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A Low Power, Low Supply Voltage, and Wide dB-Linear Range Pseudo-Exponential Function Generator
Laksono Widyo Isworo,Cosy Muto,Hiroshi Ochi 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
A new topology of pseudo-exponential function generator, which features low supply voltage (1.2V), low power (0.3㎽), and wide ㏈-linear range (120 ㏈), is proposed. Its rail-to-rail topology results in an improved implementation of the pseudo-exponential function to achieve wider ㏈-linear range. These features make the pseudo-exponential function generator suitable for realizing very wide gain range variable gain amplifier (VGA). The pseudo-exponential function generator is simulated in 90㎚ CMOS technology and verified by ADS simulation. The comparison between the proposed topology and the reference topology is also presented.