Title: Method and device for stabilizing a transfer function of a digital phase locked loop
Application Number: 200610110893 Application Date: 2006.06.30
Publication Number: 1968020 Publication Date: 2007.05.23
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03L7/08
Applicant(s) Name: Infineon Technologies AG Address:
Inventor(s) Name: Da Dalt Nicola
Attorney & Agent: zhujin gui
Abstract:
    In a method for stabilizing a transfer function of a digital phase locked loop a random digital signal is fed into the phase locked loop. The phase locked loop comprises the transfer function and a phase locked loop gain which changes with time due to disturbances and the random digital signal comprises a predetermined variance. The transfer function depends from the phase locked loop gain. A cross correlation function is generated by cross correlating a signal of the phase locked loop with the random signal and an impulse response is estimated between the random signal and the signal of the phase locked loop by means of the cross correlation function and the predetermined variance of the random signal. The transfer function of the phase locked loop is set in dependence on the estimated impulse response.
Time: 7