Patent ID: 8901917

Claim:
An element measurement circuit, comprising: an oscillator, for generating a first oscillation clock and a second oscillation clock; a frequency divider, for dividing the first oscillation clock to generate a third oscillation clock, and for dividing the second oscillation clock to generate a fourth oscillation clock; a frequency detector, for detecting a frequency of the third oscillation clock according to a reference clock to generate a first count value, and for detecting a frequency of the fourth oscillation clock according to the reference clock to generate a second count value; and a controller, for generating a first oscillation period according to the first count value, for generating a second oscillation period according to the second count value, and for generating a measurement value according to the first oscillation period and the second oscillation period; wherein the frequency divider divides the first oscillation clock by M and divides the second oscillation clock by M; the controller generates the first oscillation period by multiplying the period of the reference clock by the first count value and dividing by M; the controller generates the second oscillation period by multiplying the period of the reference clock by the second count value and dividing by M; the first oscillation period corresponds to the frequency of the first oscillation clock; and the second oscillation period corresponds to the frequency of the second oscillation clock.