Frequency-voltage conversion circuit, delay amount judgement circuit, system having frequency-voltage conversion circuit, method of adjusting input/output characterictics of frequency-voltage conversion circuit, and apparatus for automatically adjusting input/output characteristics of

摘要

A frequency-voltage conversion circuit 21 receives a clock CLK as an input and provides a voltage IVdd in accordance with the frequency of the clock as an output. The input and output characteristic of the frequency-voltage conversion circuit 21 is adjusted to substantially match a given input and output characteristic.