PATTERN DETECTION CIRCUIT

PROBLEM TO BE SOLVED: To provide a pattern detection circuit to detect unique data from among pieces of inputted data of a single pulse, that the circuit scale and the cost are reduced. SOLUTION: When the unique data with a pattern of (00100010) are extracted from among inputted data of a single pulse in which two or more continuous bits do not become 1, this pattern detection circuit is constituted to detect the inputted data as the unique data, only if the inputted data match with the unique data in bit digits D1 and D5 of 1 of the unique data and bit digits D3 and D7 or zero which are not adjacent to 1.