采用基极—发射极结保护提高可靠性

• 出 处: 邮电技术资料
• 发表日期: 1974年Z1期
• 关键词: 基极电流 反向击穿 增音系统 瞬态过程 传输比 电子物理 如水 电子设备 电路设计 电气特性

在某些应用,如水和空中系统中可靠性是极其重要的.水下增音系统,要求晶体管县有20年的有效寿命,其电气特性变化不超过10%.基极发射的反向击穿或者因此引起直流电宽传输比hFE的显著下降是严重影响晶体管特性的问题之一.虽然,在过去几年中,已有一些论文对这种现象作了电子物理里方面论述,从最近对空中电子设备的瞬态测试表明,这种反向基极发射极的瞬态过程及其影响并不是所有电路设计人员都了解的.

Reliability is of paramount importance in some applications, such as water and airborne systems. Underwater phonic systems require that the transistor counties have a useful lifetime of 20 years and their electrical characteristics do not vary by more than 10%. Reverse breakdown of the base launch Or the significant drop in DC transmission over hFE is thus one of the issues that severely affect the transistor characteristics.Although some papers in the past few years have made electronic physical aspects of this phenomenon, Transient testing of equipment shows that the transient process and its effects of this reverse base emitter are not understood by all circuit designers.