Patent ID: 6657500
Filing Date: 2003-12-02
Classification: G06F,H03L

Abstract:
A piecewise linear phase locked loop frequency generator to generate a voltage signal controlled by an input voltage comprising:a variable static frequency generator connected to receive a control voltage to select a frequency transfer curve from a plurality of transfer curves to create a static output frequency, whereby the frequency range of the phase locked loop is divided into a plurality of sections, such the once an appropriate one of the plurality of transfer curves is selected, the output frequency is determined as a function of said control voltage; a plurality of low pass filters, each having inputs connected to the variable static frequency generator to filter any higher frequency component from the variable static frequency generator; and a selector switch connected to each output of the low pass filters, and connected to receive said control voltage to determine which of the plurality of low pass filters is to filter the output frequency from the variable static frequency generator.