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这里介绍一架简单的集成电路收音机,只用一块集成功率放大器SL31和少量分立元件组成。它具有制作容易、体积小巧、放音响亮、频响宽、音质好等特点。收音机电路见图1。晶体管BG担任高频电压放大,线圈L_1与电容C_1组成调谐回路,选择要收听的电台信号经L_2、C_2耦合到BG的发
Here’s a simple integrated circuit radio, using only an integrated power amplifier SL31 and a small number of discrete components. It has the production of easy, small size, loud speaker, wide frequency response, good sound quality and so on. Radio circuit shown in Figure 1. Transistor BG as high-frequency voltage amplification, coil L_1 and capacitor C_1 form a tuned loop, select the radio signal to listen to by L_2, C_2 coupling to the hair of the BG