Comparison of thermometer to binary encoders for flash ADCs

Encoders play a critical role in performance of analog to digital converters (ADCs). These encoders can be implemented in different topologies depending upon the required performance ADCs. In this paper different thermometer to binary (T2B) encoders employed in flash ADCs are analyzed in terms of bubble error, delay and power consumption. ROM encoder, Wallace tree, Fat tree and Multiplexer based encoder are compared for their performance.