公开(公告)号：HK1056015A1

公开(公告)日：2004-01-30

申请号：HK03108207

申请日：2003-11-12

Applicant: QUALCOMM INC

Inventor： PATRICK CHRISTOPHER ,  SAED YOUNIS G

IPC: G01S1/00 ,  G01S7/40 ,  G01S19/03 ,  G01S19/23 ,  H03J20090101 ,  H03J7/04 ,  H03L20090101 ,  H03L1/00 ,  H03L1/02 ,  H03L7/06 ,  H03L7/18 ,  H04B1/707 ,  H04L27/00

Abstract: The frequency error of an oscillator is minimized by characterizing the oscillator. A reference signal from an external source containing a minimal frequency error is provided to an electronic device. The external signal is used as a reference frequency to estimate the frequency error of an internal frequency source. The electronic device monitors parameters that are determined to have an effect on the frequency accuracy of the internal frequency source. Temperature is one parameter known to have an effect on the frequency of the internal frequency source. The electronic device collects and stores the values of the parameters as well as the corresponding output frequency or frequency error of the internal frequency source. The resultant characterization of the internal frequency source is used to compensate the internal frequency source when the internal frequency source is not provided the external reference signal.