Circuit and method for timestamp filtering with input/output format conversion

Abstract

A circuit and corresponding method perform timestamp filtering. The circuit comprises input format-conversion logic that converts a received timestamp from an original timestamp format to an intermediate timestamp format. The circuit further comprises recursive filter logic coupled to the input format-conversion logic. The recursive filter logic generates a filtered timestamp in the intermediate timestamp format by filtering the received timestamp in the intermediate timestamp format. The circuit further comprises output format-conversion logic coupled to the recursive filter logic. The output format-conversion logic converts the filtered timestamp from the intermediate timestamp format to the original timestamp format and outputs the filtered timestamp in the original timestamp format. Converting the received timestamp into a different format avoids use of complex logic to handle rollover of input values, thereby reducing area and power consumption of the circuit.