| 摘要 |
PURPOSE:To obtain a square wave having an equal period between the signal levels 1 and 0, by varying the comparison level of a comparator which supplies the output signal of a pulse oscillator in accordance with the difference of pulse duration between the signal levels 1 and 0 of the output pulse. CONSTITUTION:The output signal of the pulse oscillator PG is supplied to the comparator 1, and the output pulse is supplied to the 1st pulse duration analog converter 2. Thus the pulse duration of signal level 1 is converted into the analog quantity. On the other hand, the output pulse of the comparator 1 is supplied to the 2nd pulse duration analog converter 4 via the inverter 3. Thus the pulse duration of the output signal level 0 of the comparator 1 is converted into the analog quantity. The output signals of the comparators 2 and 4 are supplied o the deviation amplifier 5, and the output signal of the amplifier 5 is fed back to the comparator 1 to move the comparison level up and down. Thus the signal level 1 becomes equal to 0 for the output pulse signal. |
