声表面波压控振荡器的可靠性

Reliability of SAW Voltage Controlled Oscillator

对一种声表面波压控振荡器的工作失效率进行了预计。建立了由 5个单元组成的可靠性串联模型。应用可靠性预计手册计算了各单元的工作失效率。结果表明 ,在 + 70°C和 ML 环境条件下 ,预计这种振荡器的平均无故障工作时间为 13781h。如果将元器件的质量提高 1个等级 ,在相同条件下的平均无故障工作时间将大于2 0 0 0 0 h。

Reliability model in serise consisting of 5 units is set up to estimate the failure rate of a SAW voltage controlled oscillator(VCO).The failure rate for each unit is calculated according to reliability handbook.Results show the mean time between failures for VCO is 13 781 hours on condition of +70 °C and M L,which will be 20 000 hours or more for device with highe quality.