| 摘要 |
PURPOSE:To obtain a synthesizer device which features the simple circuit constitution and has no trouble at all in terms of the substantial working property, by obtaining the division ratio control data of the programable divider via the divider circuit. CONSTITUTION:The output end of voltage control oscillator 31 is connected to programable divider 33 along with output terminal 32, and the output end of divider 33 is connected to one end of the input of phase comparator 34. At the same time, the other input end of comparator 34 is connected to the output end of standard oscillator 35 via selector 36, and the output end of oscillator 35 is connected to the input end of oscillator 31 via low pass filter 37. On the other hand, the control data is supplied to the division ratio control data input end of divider 33 via divider circuit 39, and at the same time detecting circuit 38 detects whether the minimum digit data among the control data features 0, 5 or other numbers. Then the 1st- 3rd detection signals are supplied to the control ends of selector 36 and circuit 39 each. |
