在目前进口的家电产品中,如大屏幕彩色电视机、录像机、影碟机等大量采用了BRT器件(Bias Resistor Builtin Transistor)即电阻内置三极管,在电路中大部分做反相器和射随器。损坏后,因内部结构较特殊,国内市场上很难购到同类型号管进行代换。如果知道其内结构和电性能要求,该器件自制非常容易。 In the current import of home appliances, such as large-screen color TV sets, VCRs, DVD players and other large use of BRT devices (Bias Resistor Builtin Transistor) that is built-in transistor resistance, most of the circuit to do the inverter and emitter follower. After the damage, due to the special internal structure, the domestic market is difficult to buy the same type of pipe replacement. The device is very easy to make by yourself if you know its internal structure and electrical performance requirements.