Title :
Compact power-efficient class-AB CMOS exponential voltage to voltage converter
Author :
De La Cruz-Blas, C.A. ; López-Martín, A.J. ; Ramirez-Angulo, J.
Author_Institution :
Dept. of Electr. & Electron. Eng., Public Univ. of Navarra, Spain
Abstract :
A novel implementation of a rail-to-rail exponential voltage to voltage converter is presented. It is based on a pseudo-exponential approximation that is easily achieved by the nonlinear currents of a class-AB transconductor. Measurement results for a 0.5 μm CMOS technology show a 52 dB output voltage range with linearity error less than ±2 dB using a dual supply voltage of ±750 mV. The power dissipation is less than 40 μW.
Keywords :
CMOS integrated circuits; convertors; operational amplifiers; 0.5 micron; 750 mV; class-AB CMOS voltage to voltage converter; class-AB transconductor; dual supply voltage; exponential voltage to voltage converter; nonlinear currents; pseudo-exponential approximation; rail-to-rail voltage to voltage converter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20063667
