| 摘要 |
<p>PURPOSE:To attain optional irregular frequency division by writing a frequency division data to a ROM in advance, reading it and shifting the data one by one bit each. CONSTITUTION:A reference clock 16 outputted from a reference clock output circuit 11 passes through a counter 15 and one clock in X clocks is inputted to a ROM pointer 12. The ROM pointer 12 is incremented for each input of the clock, the value is used as an address for the ROM 13, X bits are read by each increment of the address of the ROM 13 and inputted to a shift register 14. The shift register 14 shifts a data in the X bits for each clock of the reference clock 16 by one each and outputs the result. Thus, optional irregular frequency division is implemented.</p> |
