| 摘要 |
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 simulated within a simulator to determine the function of a phase locked loop within an electronic system.
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