| 摘要 |
A digitally controlled oscillator for generating a plurality of signals spaced apart by very small frequency increments. The system comprises first means for generating a source signal of frequency fc, second means responsive to said first signal to produce a first binary output signal of frequency Nfc/2n, where n is a variable integer. Also provided are first frequency divider means responsive to said first binary output signal to produce a second binary output signal of frequency Nfc/2n+m, where m is another integer and second frequency divider means also responsive to said first signal fc to produce a third binary output signal of frequency fc/2T. Further provided are logic means responsive to said second and third binary output signals to produce a fourth binary output signal of average frequency fc/2T+Nfc/2n+m.
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