Title :
Compact power-efficient CMOS exponential voltage-to-voltage converter
Author :
De La Cruz-Blas, Carlos A. ; Lopez-Martin, Antonio
Author_Institution :
Dept. of Electr. & Electron. Eng., Public Univ. of Navarra, Pamplona
Abstract :
In this paper, a novel low-voltage low-power implementation of an exponential voltage-to-voltage converter (EVVC) is presented. It is based on a pseudo-exponential approximation whose terms are easily achieved by the nonlinear currents of a class-AB transconductor. The circuit is able to operate correctly for supply voltages as low as VGS + 2VDSsat. Simulation results in a 0.5mum CMOS technology show a 47 dB output voltage range with linearity error less than plusmn0.5dB at plusmn1.5 V supply voltage. The power dissipation is less than 100muW
Keywords :
CMOS integrated circuits; power convertors; 0.5 micron; 1.5 V; 100 muW; CMOS exponential voltage-to-voltage converter; EVVC; class-AB transconductor; nonlinear currents; pseudo exponential approximation; supply voltages; Bipolar transistors; CMOS technology; Circuit simulation; Gain control; Linearity; MOSFETs; Power dissipation; Taylor series; Transconductors; Voltage;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1692891
