Method of forming an audio processing system and structure therefor

摘要

In one embodiment, an audio processing system includes a frequency control block that forms a system clock and a master audio clock. The frequency control block is configured to change a frequency of the system clock and change a relationship between the system clock and the master audio clock so that the frequency of the master audio clock remains substantially constant.

主权项

1. An audio processing system comprising:
a processor that operates from a system clock and that processes an electrical signal, the system clock having a first frequency; an analog-to-digital converter that operates from a second clock, the analog-to-digital converter configured to receive a first electrical signal that is representative of an audio wave and configured to convert the first electrical signal to a digital signal, the second clock having a second frequency; a frequency control block having an oscillator that generates a base oscillator signal at a third frequency; a multiplier of the frequency control block configured to receive the base oscillator signal and multiply the third frequency by a first relational value to form the system clock at the first frequency; a divider of the frequency control block configured to receive the system clock and divide the system clock by a second relational value to form the second clock at the second frequency; and the frequency control block configured to change the first relational value to change the first frequency to a fourth frequency and configured to change the second relational value to maintain the second frequency substantially constant.