| 摘要 |
PURPOSE:To wade a change in the operating point due to a change in the condition by using a digital counter circuit and a latch circuit so as to attain the digital operation in a synchronizing loop. CONSTITUTION:An input clock pulse is subject to 1/N1 by a frequency divider 1, a latch pulse 7 is outputted and fed to a latch circuit 4. The oscillated frequency from an oscillator 3 is controlled in response to a digital output 6 from the latch circuit 4 in the synchronizing loop and the output of the oscillator 3 is fed to a digital counter circuit 2. An output from the said digital counter circuit 2 is given to the latch circuit 4, which latches a digital input 5 from the digital counter circuit 2 applying 1/N2 frequency division to its output till a new latch pulse 7 is inputted. |
