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一、前言 xc系列台式仪器是全晶体管化和部分集成电路组成的电子线路。该仪器中的电子元器件的工作温度与设备的可靠性有着密切的关系。对电子设备应该进行必要的热设计,以保证它在合适的温度中工作。为了使仪器有合乎要求的热特性,有许多规范规定了电子元器件的允许温度。事实表明:电子元器件的故障率随元件温度的升高,呈指数关系而增加。电子设备线路的性能,则
I. Introduction xc series of desktop instruments is all-transistor and part of the integrated circuit composed of electronic circuits. The operating temperature of the electronic components in the instrument is closely related to the reliability of the equipment. Electronic equipment should be the necessary thermal design, to ensure that it is in the right temperature work. There are many specifications governing the allowable temperature of electronic components in order to provide the instrument with the desired thermal characteristics. The facts show that: the failure rate of electronic components with the component temperature increases exponentially. Electronic equipment line performance, then