Modulators – Frequency modulator – Including stabilization or alternatively distortion – noise...
Reexamination Certificate
2005-08-23
2005-08-23
Kinkead, Arnold (Department: 2817)
Modulators
Frequency modulator
Including stabilization or alternatively distortion, noise...
C332S128000, C332S148000, C375S376000, C331S016000, C455S113000, C455S260000
Reexamination Certificate
active
06933798
ABSTRACT:
In the case of a trimming method for a PLL circuit operating based on the principle of a two-point modulation, the PLL circuit is locked without any modulation being impressed and then an analog and a digital modulation signal are impressed into the locked PLL circuit. A signal that is characteristic of the PLL control error is tapped from the PLL circuit, and the modulation swing in the analog modulation signal is changed such that the characteristic signal has the same value as before the analog and digital modulation signals were impressed.
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Hammes Markus
Van Waasen Stefan
Greenberg Laurence A.
Infineon - Technologies AG
Kinkead Arnold
Locher Ralph E.
Stemer Werner H.
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