Analysis of the Improved Conventional Dynamic Comparator and the Edge-Pursuit Comparator

Abstract

In order to understand and learn the comparator in detail, three kinds of comparator are analyzed in this paper. An improvement of the traditional dynamic double-tailed comparator. So as to get fast operation and low power in low supply voltages, the circuit of the traditional double-tailed comparator is modulated. Another one is an improved low-power comparator. During evaluation, we can activate its latch delayed in order to avoid excess power consumption and get sufficient preamplification gain. The most innovative design is named edge-pursuit comparator (EPC) which is a new energy-efficient ring oscillator collapse-based comparator. With changing the comparison energy on the basis of input difference uncontrolled, it can automatically adjust its performance. It can also eliminate unnecessary energy which is spent on coarse comparisons. In addition, we get analysis of the design which is in the phase domain in detail. It presents that the energy efficiency can be improved over traditional comparators even out of energy scaling.