A frequency measuring apparatus for measuring the frequency of an input signal to be measured with high accuracy. The apparatus includes a crystal oscillator for generating an internal reference frequency, a temperature sensor provided on the crystal oscillator, a writable memory and an estimation...http://www.google.fr/patents/US5719782?utm_source=gb-gplus-shareBrevet US5719782 - Frequency measuring apparatus and frequency measuring method
Frequency measuring apparatus and frequency measuring method
