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前言 X72集成电路用于电视接收机和调频接收机中的中频限幅放大和鉴频系统。该电路能完成中频限幅放大、相位检波、音频前置放大和电子音量控制等功能。其电路原理示于图1。 X72单片集成电路包含有晶体管53只,电阻49只,电容3只,共计105只元件,属于线性中规模集成电路。该电路具有以下特点:性能较好,输入灵敏度小于100μv,
Introduction X72 integrated circuits for television receivers and FM receivers in the IF limiting amplification and frequency identification system. The circuit can complete the IF limiting amplification, phase detection, audio preamp and electronic volume control functions. The circuit principle is shown in Figure 1. X72 monolithic integrated circuit contains 53 transistors, 49 resistors, capacitors 3, a total of 105 components, are linear scale integrated circuits. The circuit has the following characteristics: better performance, input sensitivity is less than 100μv,