METHODS AND APPARATUS TO GENERATE SMALL FREQUENCY CHANGES

摘要

In one embodiment, the present invention includes an apparatus having a first capacitor coupled between a first node and a second node, a second capacitor coupled between the second node and a reference potential, and a third capacitor coupled between the second node and a switch, where the switch is controllable to couple the third capacitor to the second node. Using such an apparatus small changes in capacitance and correspondingly small changes in frequency may be effected. Other embodiments are directed to calibration of one or more capacitor banks.