| 摘要 |
PURPOSE:To constitute simply a synchronizing pulse generating circuit with less number of components by combining three transistors (TR), two capacitors, there resistors and a variable resistor. CONSTITUTION:When a square wave is inputted from a signal input terminal 1, a TR T1 is conductive by the discharge of a capacitor C1 at the leading of the input and the base current of a TR T2 is drawn to conduct the TR T2, and the TR T2 is conductive by the charging of a capacitor C2 at the trailing of the input depending on the charging/discharging by the differentiation operation of the capacitors C1, C2. The conduction state of the TR T2 conducts the output TR T2. An output pulse outputted from an output terminal 2 is given to a low output impedance because emitter follower is adopted for a TR T3 and the output voltage is controlled by the adjustment of a variable resistor VR.
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