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近来,国外一些大半导体公司,如美国国家半导体公司,法国汤姆森公司,韩国三星公司,都推出了单片小功率放大器IC。2×1W立体声功放,可用来放大随身听或便携式CD唱机的立体声道信号,直接推动小音箱。当然也可用在其他场合。芯片的外围元件很少,使用特别方便。下面是用汤姆森的TDA2822M或三星公司的KA2209制作的2×lW功放。图1、图2、图3分别为电路图、印制板和元件布置图。电路非常简单,不必作过多解释。插座J1 、J2可以接两个不同的双声道立体声声源。C8、C2是输入信号的隔直流电容,防止有时输入信号中含直流分量而破
Recently, some large foreign semiconductor companies, such as National Semiconductor, France Thomson Corporation, South Korea’s Samsung, have introduced a single low-power amplifier IC. 2 × 1W stereo amplifier, which can be used to amplify the stereo signal of portable player or portable CD player, and directly push the small speaker. Of course, can also be used in other occasions. Few peripheral components of the chip, the use of special convenience. The following is a 2x1W amplifier made with Thomson’s TDA2822M or Samsung’s KA2209. Figure 1, Figure 2, Figure 3, respectively, the circuit diagram, PCB and component layout. Circuit is very simple, do not have to make too much explanation. Socket J1, J2 can connect two different two-channel stereo sound source. C8, C2 is the DC blocking capacitor of the input signal, to prevent the input signal sometimes containing DC components and broken