盒式录音机稳速电路的设计计算

Design and Calculation of steady speed circuit of the Cassete recorder

在音响装置中,磁带走速稳定与否直接关系到音质的好坏.目前国内外大多数录音机均采用电子稳速电路来保证带速的稳定,故研究简单,实用的电路,提高稳速指标很有必要. 本文通过一典型实例,提出稳速电路的简便设计计算方法.并通过调试使设计电路的稳速指标达到国家等级标准(转速误差△n<±1.5％,瞬时抖晃率△W<0.3％).所提出的设计计算方法可供设计与维修人员参考.

The sound quality of the sounder outfit bears on the stability of magnetic tape speed. All but a good many of cassete recorder on the world adopted the electronic circuit of steady speed, which assures stabilization of tape speed.Therefore, it is necessary to research the practical and simple circuit and to develop the function of steady speed. This paper will go through a practical exemplar to points out the simple method of design and calculation of steady speed circuit. Through the measures and adjustment gained results of steady speed, which reached the National standard (△n%<1.5%, △W%<0.3%). That is useful for the designer and repairmen.