| 摘要 |
PURPOSE:To apply a stable low frequency output to a load by converting the frequency F of the output of an oscillator to a voltage V, comparing the V with an output from a frequency setting circuit, controlling the oscillator with the compared output, dividing the frequency of the output of the oscillator and supplying it to a load to be controlled. CONSTITUTION:An oscillation output outputted from a microcomputer 4 is converted by an F/V converter 2 in frequency to a voltage, and is compared with the voltage set by a frequency setting circuit 1 by a comparator 3. The output of the comparator 3 is inputted to the microcomputer 4. The microcomputer 4 has an UP/DOWN unit 5 for judging the output state of the comparator 3 and producing L or H information, a controller 6 for controlling the oscillation frequency, and an OSC7 for producing an oscillation output, and a frequency divider 8 for dividing the output from the OSC7 and producing an output to a load 9. |
