| 摘要 |
A frequency divider includes a mixer having a first input connectable to a reference oscillator and a second input connectable from the reference oscillator through a frequency synthesizer to the second input of the mixer. The mixer provides an output signal to a filter, which provides a frequency divider output. The frequency synthesizer provides an output signal having a frequency of (N+1)/N or (N-1)/N times the input FIN from the reference oscillator. With the frequency synthesizer providing the signal FIN(N+1)/N, or FIN(N-1)/N, the output of the mixer provides the signal having the frequency FIN/N and can utilize a single filter to eliminate undesired mixer outputs. Further, the frequency synthesizer can be configured to utilize an oscillator which operates over the same frequency range as the reference oscillator.
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