数字音量控制的电路

[数字音量控制电路的电路图
  　　
  
   
  材料BOM表：
  J1 = RCA Audio Input Socket
  J2 = RCA Audio Input Socket
  C1 = 0.1uF-16V Ceramic Disc Capacitor
  C2 = 0.1uF-16V Ceramic Disc Capacitor
  C3 = 0.1uF-16V Ceramic Disc Capacitor
  IC1 = DS1669 (is available from Dallas SCo.
  SW1 = Momentary Push Button Switch
  SW1 = Momentary Push Button Switch