| 摘要 |
PURPOSE:To obtain a carrier of high accuracy by a carrier oscillator having a simple specification applying a positional synchronization to the position synchronizing circuit by a base oscillator. CONSTITUTION:The output of the voltage control oscillator (VCO)3 is frequency divided into 1/n1 by the first frequency divider 4 and shaped into sine wave by the low pass filter, amplified by the amplifier 6 and put out as output to the output terminal 9-1, whereas this output frequency is frequency divided into 1/m1 by the second frequency divider 7 for equalizing to the base frequency, compared with the base frequency from the base oscillator 1 by means of the phase comparator 8 to control VCO3 so as to coincide both the frequencies. Therefore, if the base frequency is 4KHz, the output frequency becomes 4m1KHz. The value of n1 is a ratio of frequency division for determining the oscillation frequency and may be selected so as to easily constitute VCO. |
