Menetelmä ja kytkentäjärjestely ajan mittaamiseksi tarkasti epätarkalla kellolla

摘要

A time measurement system for measuring time accurately with an inaccurate clock, in which two clock oscillators are compared and the momentary error of the slower clock oscillator is measured. When the error change rate of the slower clock oscillator is slow enough the fast clock oscillator can be switched off for longer time intervals. With the help of this apparatus and method of operation power can be saved in portable equipment which requires accurate time measurement.