| Title: | Compensating method for a pll circuit that functions according to the two-point principle, and pll circuit provided with a compensating device | ||
| Application Number: | 02818991 | Application Date: | 2002.07.24 |
| Publication Number: | 1559104 | Publication Date: | 2004.12.29 |
| Approval Pub. Date: | Granted Pub. Date: | ||
| International Classifi-cation: | H03C3/09 | ||
| Applicant(s) Name: | Infineon Technologies AG | Address: | |
| Inventor(s) Name: | Grewing Christian, Hammes Markus, Hanke Andre | ||
| Attorney & Agent: | cheng tianzheng liang yong | ||
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Abstract: |
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| A PLL circuit (1) is tuned to a first frequency (F1) by using a first digital modulation signal (6) and is subsequently tuned to a second frequency (F2) by using a second digital modulation signal (6'). A differential signal (9'), which is characteristic of the change in voltage of a control signal (SS) of the VCO (14), said change being effected by the modulation signals, is compared with a comparison signal (8') that is characteristic of the analogous modulation amplitude, and the analogous modulation amplitude is changed in order to eliminate a variation determined during the comparison. | |||
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| Time: | 12 | ||
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