Compensating capacitive dielectric absorption induced...

Details Compensating capacitive dielectric absorption induced... Compensating capacitive dielectric absorption induced...

2008-01-22

2008-01-22

Pascal, Robert (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

C327S157000, C375S376000

Reexamination Certificate

active

11102936

ABSTRACT:
A PLL comprises a VCO and a loop filter, wherein the VCO generates an AC output signal having a frequency which depends on an applied control voltage, and wherein the loop filter provides a control voltage to the VCO. The control voltage reflects determined phase differences between a potentially frequency divided output signal of the VCO and a reference signal. When operating the PLL, frequency deviations between a potentially frequency divided output signal of the VCO and a reference signal are detected and in addition, a resolution employed for detecting the frequency deviations is lower than a resolution employed for determining the phase differences. In case a frequency deviation is detected, a direct-current voltage shift is added to the control voltage provided by the loop filter.

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patent: 00/14882 (2000-03-01), None
patent: 03/67762 (2003-08-01), None

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