| 摘要 |
A synchronized frequency generating system is provided which includes a main crystal clock, for producing a basic frequency FB, a channel sampling phase locked loop (PLL) unit, connected to the main crystal clock, for converting the basic frequency FB into a channel sampling frequency FCS, a voice sampling PLL unit, connected to the main crystal clock, for converting the basic frequency FB into a voice sampling frequency FVS, a time tracking unit, connected to the channel sampling PLL unit, for detecting signal characteristics so as to determine a channel sampling frequency phase change value DELTA phi CS and a frame timing phase change value DELTA phi FRAME, and a frequency controller, connected to the voice sampling PLL. The frequency controller receives channel sampling frequency phase adjustment data and determines a voice sampling frequency phase change value DELTA phi VS. The frequency controller provides the voice sampling frequency phase change value DELTA phi VS to the voice sampling PLL.
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