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任何电气产品除必须具有先进的电气性能外,还必须具有高的可靠性水平.在一定意义上讲,稳定可靠更为重要.为了了解南京固体器件研究所某些产品的可靠性水平,已对GaAs三厘米雪崩注入锁定放大器作了长期工作寿命试验.选择了1980年研制定型的WFB52型GaAs三厘米雪崩注入锁定放大器作为试验样品.除选用2台正品外,还挑选了4台副品,共有6台投入长期工作寿命试验.所谓副品是指中心频率和输出功率稍偏离产品技术规范规定的技术指标.雪崩注入锁定放大器要求恒流源供电,设计的恒流源应使雪崩管工作电流随环境温度的升高而略微下降.这样既减少了输出功率随环境温度而变化,又降低了高温条件下雪崩二极管的直流功耗.从而大大提高了雪崩注入锁定放大器的工作稳定性.长期工作寿命试验线路如图1和图2所示.
In addition to having to have advanced electrical properties of any electrical products, but also must have a high level of reliability, in a sense, stable and reliable is more important in order to understand the Nanjing Institute of solid state equipment, the reliability of some products, GaAs three centimeters avalanche injection lock-in amplifier for a long-term working life test.Developed stereotyped WFB52 GaAs three centimeters avalanche injection lock-in amplifier was selected as a test sample in 1980. In addition to the selection of two genuine, but also the selection of four sub-products, a total of 6 into the long-term working life test.The so-called vice product is the center frequency and output power slightly deviate from the technical specifications of the product specifications.Avaporative injection lock-in amplifier requires constant current source power supply, the design of the constant current source should be Avalanche tube current The ambient temperature increases slightly down.This will not only reduce the output power changes with the ambient temperature, but also reduces the high temperature avalanche diode DC power consumption.This greatly improves the avalanche injection lock-in amplifier work stability. Long-term working life Test circuit shown in Figure 1 and Figure 2.