Method and system of characterization and behavioral modeling of a phase-locked loop for fast mixed signal simulation
US6657500B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 2002 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Apr 17, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0991
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A piecewise linear phase locked loop frequency generator generates a voltage signal controlled by an input voltage. This frequency generator has a variable static frequency generator, whose frequency is selected by a control voltage and whose transfer function between control voltage and output frequency is further selected by a piecewise linear determination parameter. The piecewise linear determination parameter is the number which selects which portion of the frequency spectrum is being represented by the control voltage to frequency transfer function being selected and is a function of an input control voltage. The frequency generator has a set of n low pass filters, used to work in conjunction with the corresponding control voltage to provide frequency transfer functions which are selected by the piecewise linear determination parameter. Finally, a switch circuit is employed to select as a function of the piecewise linear determination parameter which low pass filter output should be presented as the dynamic frequency which corresponds to the original control voltage input. In addition, it is also an objective of this invention to provide a model of a phase locked loop to be s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.