JPS643570A - Crest value detector - Google Patents

Abstract

PURPOSE:To make digital conversion of a crest value with high accuracy by using a comparator having a high through rate and high-speed flip-flop. CONSTITUTION:For example, a '1' is set in the MSB of a register and other BITs are reset to '0' in a first stage. The presence or absence of the operation of the comparator 9 is stored in the flip-flop 10 and the result of the flip-flop 10 is read in the register 7 by the clock pulses between the ensuing stages so as to reset the flip-flop 10. The '1' is set in the MSB of the register 7 when the comparator 9 operates. The '1' is not set when the comparator does not operate. The result of the first stage is maintained in the MSB, the '1' is set in the BIT 2 and the BITs 3, 4 are held reset at the '0' in the next stage. The result of the BIT 2 is thereafter obtd. according to the presence or absence of the operation of the comparator 9 in the same manner as in the first stage. The same is executed with the BIT 3 in the ensuing stage and is further executed with the BIT 4 in the stage that follows said stage. The conversion of the crest value with the high accuracy is thus executed with the repeating waves of high frequencies.