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电阻、电容、电感、晶体管等是电子电路的基本元件。在电视机中还有固体滤波器、石英晶体振荡器、行输出变压器等特殊元件,现简单介绍如下。 一、石英晶体振荡器 石英晶体振荡器连接在彩色电视机的解码集成电路中,其主要作用是产生固定频率为4.43MHz且稳定的副载波。它由石英振子、支架、外盒等构成。其中,石英振子由具有压电效应的石英晶体按一定取向加工而成,并由电极引出。 石英晶体振荡器的外形及主要电气性能参数如表1(型号HC-43/μ)。
Resistors, capacitors, inductors, transistors, etc. are the basic components of electronic circuits. In the TV there are solid filters, quartz crystal oscillator, line output transformers and other special components, are briefly described below. First, the quartz crystal oscillator Quartz crystal oscillator connected to the color TV decoding integrated circuit, its main role is to produce a fixed frequency of 4.43MHz and stable subcarriers. It consists of quartz oscillator, brackets, boxes and other components. Among them, the quartz oscillator by the piezoelectric effect of quartz crystals processed according to a certain orientation, and leads from the electrode. Quartz crystal oscillator shape and the main electrical performance parameters in Table 1 (Model HC-43 / μ).