TTL 逻辑门可以很容易地变成一个线性放大器,并能变成某些有意设计的基本电路。如图1所示的 SN7400门电路,附加的反馈使得门电路的输入和输出之间产生良好的线性关系。两个这样线性化的门电路串联连接就构成一个具有相位延迟等于3G0度的线性放大器。果如通过一个晶体或一个电容使回路闭合,就会产生振荡。用这种技术就能构成很有用的高精度钟脉冲电路(图2)。输出电压为方波,可用来 TTL logic gates can easily become a linear amplifier, and can become some of the design of the basic circuit. The SN7400 gate shown in Figure 1, with additional feedback, produces a good linear relationship between the gate’s input and output. Two such linear gates are connected in series to form a linear amplifier with a phase delay equal to 3G0 degrees. If the circuit is closed by a crystal or a capacitor, it will oscillate. This technique can be used to form a very useful high-precision clock pulse circuit (Figure 2). The output voltage is square wave, can be used