A method for compensation of a temperature-dependent frequency error of a quartz crystal

摘要

A method for compensation of a temperature-dependent frequency error of a quartz crystal a real time clock, in particular for mobile radio - terminals, gps - receivers or the like, wherein a the frequency error (df / f) be described frequency error - temperature - curve in a temperature range at least partially by a temperature-dependent characteristic curve of an electronic circuit is approximated, and from a piecewise approximation obtained as a result of the compensation voltage - temperature - curve is a temperature-dependent compensation voltage (ust) is generated, and for a frequency tuning of the quartz crystal is applied.