与数字信号相关的电子产品已经广泛存在于我们的生活中,而数字电路离不开晶体二极管.新教材中恒定电流一章增加了简单的逻辑电路内容,不少含二极管的电路呈现在课本上.重视二极管的相关问题,是新课程的要求,其重 Electronic products related to digital signals have been widespread in our lives, and digital circuits are inseparable from the crystal diode. The new text in the constant current chapter adds a simple logic circuit content, many diode-containing circuit is presented in the textbook The emphasis on diode related issues is a requirement of the new curriculum, its weight