| 摘要 |
PURPOSE:To extract a pulse signal of a certain polarity regardless of the polarity of the pulse signal to be applied, by leading out the 1st or 2nd level singal in accordance with the polarity of the signal to be applied and securing an exclusive OR between the 1st or 2nd level signal and the pulse signal. CONSTITUTION:A synchronous signal input 1 to be applied to an input terminal 10 is applied to one input side of an exclusive OR circuit 20 as well as to the base of a transistor (TR) 21. The collector of the TR21 is connected to a constant power source Vcc, and the emitter is grounded via a resistance 23 and at the same time connected to the base of a switching TR28 via a clamping circuit consisting of capacitors 24 and 27, a diode 26 and others. The collector of the TR28 is connected to the other input side of the circuit 20. Then the output of the circuit 20 is extracted in the form of a synchronous signal output 9. |
