A Gray-Code Current Mode ADC Structure

Abstract

Analog to digital converters (ADC) are one of the most critical blocks in the area of electronics. This paper presents two new circuits for Gray-code current-mode analog to digital conversion which employs absolute value operation. The implementations of two different 5-bit converter circuits are discussed in this paper. 0.25 mum CMOS technology with 5 V power supply voltage is used for the circuits