this stage amplifies the audio signal which is output from the speech filter. A pair of complimentary silicon bipolar transistors are connected as buffer devices to improve the power output capability of the LF356 op amp IC used in this circuit. A gain (or OUTPUT LEVEL) control is provided ...
这之后,杜元春一直居住于此,“举人”匾也一直悬挂在举人屋的大门之上,供后人瞻仰。 屋子占地面积356平,分三进,布局合理、纹饰精美。虽然好多细节都看得不甚清晰了,但一点不妨碍它的底蕴深厚。 举人屋内保存有3个燕子窝。古人说:旧时王谢堂前燕,飞入寻常百姓家。原来还真的会有燕子飞到屋子里筑巢的。 明代和清代民...