Power Efficient and Timing Closure for Different Encoders for 3 bit Flash ADC using TIQ Comparator

In this paper, a 3-bit Flash Analog to Digital Converter (ADC) is designed with TIQ comparators. The proposed design requires 7 comparators, an encoder to convert thermometer code to binary code. The analyses 3 different encoders such as Wallace Tree, Rom Based and Mux Based for the implementation of 3 bit Flash ADC. The proposed design is implemented using Tanner tool with TSpice. The performance analysis with respect to power consumption, area is studied. The result shows Mux Based 3 bit Flash ADC provides better performance compared to Flash ADC Designed using Wallace Tree or Rom based encoder.