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目的:用与非门组成对称方波振荡器;了解与非门对称方波振荡器的工作原理;了解振荡频率与定时电路RC值的关系。电路:与非门对称方波振荡电路见图21。原理: 1.电路的组成为使与非门多谐振荡器输出对称的方波,即波形图中高电平与低电平部分同宽,最有效的方法是采用对称振荡电路,如图21所示。它由与非门F3、F4
OBJECTIVE: To form a symmetrical square wave oscillator with a NAND gate; to understand the working principle of a non-gate symmetrical square wave oscillator; and to understand the relationship between the oscillation frequency and the RC value of the timing circuit. Circuit: Non-door symmetrical square wave oscillator circuit shown in Figure 21. Principle: 1. The circuit is composed of non-gate multivibrator output symmetrical square wave, that is, the waveform of high and low level part of the same width, the most effective way is to use symmetrical oscillation circuit, as shown in Figure 21 Show. It consists of NAND gate F3, F4