| 摘要 |
PURPOSE:To compensate for the frequency deviation between bursts, by constituting an automatic frequency control loop of a processor, and a random access memory, performing the smoothing of a detected voltage at every burst by the processor, and storing a smoothed voltage by every burst by the memory device. CONSTITUTION:A processor 12 inputs the data of an address designated by a burst address signal (b) from a RAM13, and performs the smoothing by using the data, and the output data of an A/D converter 11, and stores again a smoothed data at the RAM13. Next, the processor, when the same address is designated by the signal (b), inputs the data stored in the RAM13, and outputs it to a D/A converter 14 as a control voltage data. The D/A converter 14 D/A- converts the control voltage data with the timing of a D/A conversion signal (c), and controls the output frequency of a voltage controlled oscillator 10 as the control voltage. Therefore, it is possible to perform frequency control by every burst, and to compensate the frequency deviation between the bursts. |
