Patent ID: 8340940

Claim:
An apparatus for multiplying a semiconductor test pattern signal comprising: a pattern-signal segmenting/outputting unit for segmenting a semiconductor test pattern signal into a plurality of pattern signals, and simultaneously outputting the segmented pattern signals; and a pattern-signal restoring/multiplying unit for restoring the segmented pattern signals received from the pattern-signal segmenting/outputting unit to the semiconductor test pattern signal, outputting the restored result to a driver which records a test pattern in an objective semiconductor to be tested, and multiplying the signal outputted to the driver by a predetermined frequency band rather than a frequency band of the segmented signals, wherein the pattern-signal segmenting/outputting unit includes: a first pattern generator for generating a predetermined part of the semiconductor test pattern signal, and outputting the predetermined part; and a second pattern generator for generating another part different from the predetermined part generated from the first pattern generator, and outputting the another part, and the pattern-signal restoring/multiplying unit includes: an encoder for converting the signals received from the first and second pattern generators into different types of patterns; a first formatter for combining the signal received from the encoder with a timing value, and outputting the combined result; a second formatter for combining the signal received from the encoder with another timing value different from the timing value generated from the first formatter, and outputting the combined result; and a frequency multiplication unit for performing multiplication of the signals received from the first and second formatters, and outputting one signal indicating the multiplied result wherein the encoder includes: a first encoder for performing a logic operation between the signal received from the first pattern generator and a signal received from a buffer, and outputting the logic operation result; a second encoder for performing a logic operation between the signal received from the first encoder and the other signal received from the second pattern generator, and outputting the logic operation result; and the buffer for transmitting the signal received from the second encoder to the first encoder according to a periodic clock signal.