A Multi-bit High Speed Current Mode Analog to Digital Conversion Algorithm

Abstract

This paper proposes a generic algorithm for k-bit Analog to Digital Conversion. The proposed algorithm is very fast method of conversion of an analog signal into k-bit digital output in a multi-bit parallel fashion. The algorithm employs m stages, each of which is capable of producing bits such that k/m bits are converted at the same time. Thus, this algorithm can be considered a k = n X m conversion method. The algorithm proposed has been tested for a 4-bit current mode ADC implementation. The simulations have been performed in 0.18μm CMOS technology at the supply voltage of 1.8V using P-SPICE.