Design and simulation of a new proposed single-slope integrating analog-to- digital converter system based on non-linear amplifiers

الملخص EN

In this paper, a unipolar single-slope integrating analog-to-digit converter(ADC) is discussed, designed, and simulated, whereas, its conversion time is less than that of the dual-slope integrating ADC.

The proposed system consists of logarithmic amplifier, anti-logarithmic amplifier, integrator, counter, control logic unit and two timers stages. The proposed design characterizes some of significant properties which make it distinguished from the other previous designed systems, such as, it has good noise immunity because of passing of the analog input signal through the integrator circuit which it considered as a low pass filter.

This system is capable to convert an analog voltage of range of (0.0 – 0.6) volt using non-linear amplifiers.

At last, this system has very good forward linearity relation between the output digital number and the analog input voltage value which is realized later by theoretical calculation and simulation results.

This system is simulated and tested using software package Electronic Workbench version V9, and one can see that simulation results approach to the theoretical results, so for this reason, this system possesses acceptable design and Performance.