随着电子技术的发展,越来越多的随身听具备了数字调谐、存储电台的功能,如 AIWA JX505、J303、T70等机型。此类随身听数字调谐部分都采用专用的 CMOS大规模数字调谐集成块,耗电甚微,如 TC9307F、UPD1078等集成电路。但此类随身听数字调谐部分的电路大多没有加装后备电池,而只是使用一只大容量的电 With the development of electronic technology, more and more players have digital tuning, storage radio functions, such as AIWA JX505, J303, T70 and other models. Such Walkman digital tuning part are dedicated CMOS large scale digital tuner integrated block, power consumption is minimal, such as TC9307F, UPD1078 and other integrated circuits. However, most of the digital tuning part of the Walkman circuit is not equipped with battery backup, but only use a large capacity of electricity