| 摘要 |
A voltage control oscillator includes a first current source for providing a coarse tune current; a second current source for providing a fine tune current; and a delay line, coupled to the first current source and the second current source, comprising: a first delay cell, coupled to the first current source, for delaying a input clock according to the coarse tune current and outputting a delay clock; and a second delay cell, coupled to the second current source, for delaying the delay clock according to the fine tune current and outputting a output clock; wherein the coarse tune current is used to control the oscillating frequency of the voltage control oscillator close to a target frequency and the fine tune current is used to adjust oscillating frequency of the voltage control oscillator arrive the target frequency.
|
