TD CONVERTER AND AD CONVERTER

摘要

PROBLEM TO BE SOLVED: To provide a high resolution, operational-amplifier-less/capacitor-less TD converter that reduces a switching loss and dispenses with statically holding phase information.SOLUTION: The TD converter includes: an oscillation circuit section 1 fed with time domain data; a High counter circuit section 3 for measuring a wave number of an output oscillation waveform of the oscillation circuit section while the time domain data is "High," and a Low counter circuit section 4 for measuring a wave number of the output oscillation waveform of the oscillation circuit section while the time domain data is "Low"; an output signal generation section 5 for generating an output signal from output count values of the High counter circuit section 3 and the Low counter circuit section 4; and a frequency control circuit 2 capable of causing the oscillation circuit section to oscillate continuously and controlling the oscillation frequency.