Flash analoog-digitaal omzetter

A flash analog-to-digital converter reduces a property mismatching problem which may occur due to process variations by reducing the number of comparators and resistors as compared to conventional converters. A half code generator receives an analog signal and outputs a one-bit middle code and a (m/2-1)-bit half thermometer code in response to a system clock signal, where m=2n and n is a positive integer. A code generator receives the middle code and the (m/2-1)-bit half thermometer code, performs a logic operation with respect to the middle code and the half thermometer code, and outputs an operation result as a (m-1)-bit full thermometer code. An encoder encodes the (m-1)-bit full thermometer code into n-bit binary data.