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一、引言 随着物质文化生活的提高,人们对音响设备的要求也愈来愈高。大功率的台式收音机、收录两用机、立体声多功能的音响装置相继问世。为了满足日益增长的市场需要,必须尽快发展功率放大器集成电路来取代分立元件。上海无线电七厂去年试制成功12W音频功率推动器集成电路。这种电路价廉物美、使用方便,有比单片电路小得多的静态电流。上无二厂生产的2L1400立体声台式收录机中的功放电路就用这种集成块。目前上无七厂已完成该电路的生产定型。
I. Introduction With the improvement of material and cultural life, people's requirements for audio equipment are also getting higher and higher. High-power desktop radio, included dual-use machine, stereo multi-function audio devices have come out. In order to meet the growing market needs, power amplifier ICs must be rapidly developed to replace discrete components. Last year, Shanghai Radio Seven successfully trial-produced 12W audio power pusher integrated circuit. This circuit is cheap, easy to use, and much smaller than the monolithic quiescent current. On the production plant 2L1400 stereo desktop radio in the amplifier circuit to use this manifold. Currently no seven plants have completed the production of the circuit stereotypes.