Physical quantity measuring apparatus and physical quantity measuring method

摘要

A physical quantity measuring apparatus (100) includes: a signal input module (110) receiving an input signal having consecutive pulses; a low resolution clock signal generator (130) generating a low resolution clock signal; a high resolution clock signal generator (140) generating a high resolution clock signal; a gate time generator (122) outputting gate time signals at a predetermined interval; a low resolution clock signal synchronizer (132) generating a low resolution clock synchronization signal; a low resolution counter (152) counting the number of rising edges of the low resolution clock signal; a high resolution clock signal generation controller (142) outputting the high resolution clock signal as a gated clock signal; a high resolution clock signal synchronizer (144) generating a high resolution clock synchronization signal; and a high resolution counter (154) counting the number of rising edges of the gated clock signal.