CONTROLLING THE FREQUENCY OF AN OSCILLATOR

摘要

An apparatus includes switches (126), a bank of capacitors (122) and an oscillator core (120). The oscillator core (120) is selectively coupled to the bank of capacitors (122) by the switches (126), and the oscillator core (120) provides a signal that has a frequency that is dependent on the selective coupling between the bank of capacitors (122) and the oscillator core (120). The apparatus also includes a circuit (300) that is adapted to change the coupling between the bank of capacitors (122) and the oscillator core (120) to change the frequency and impose a rate limit at which the frequency changes to avoid a significant glitch in the signal.