シュミット・トリガ形パルス周期発振回路の基礎考察(I)

Abstract

The schmitt trigger circuit is most often encountered in practice. It has been well known the output of this circuit can be employed as a signal amplitude discriminator. In this paper, it is described the basic consideration, as the following, that is, the output are given behavior of positive or negative periodic-pulse-train oscillating duringa time interval, within which the input signl cross over a threshold level in this circuit. What matter is stated in the following two main points; first the resistor coupled common Enitter and all stages gain play an important role at the oscillating, and secondary it is necessary for variable Emitter voltage to input to have form of V letter's characteristic curve. Furthermore, according to the experimental investigations, it would be provide that Base-Bias of head stages have a relation to all its stage, and its gain was observed to have a looped characteristic with the peak point.