Journal of Radiation Research and Radiation Proces ›› 2015, Vol. 33 ›› Issue (3): 30801-030801.doi: 10.11889/j.1000-3436.2015.rrj.33.030801

• RADIATION PHYSICS • Previous Articles    

Ionizing radiation effects on typical clock oscillator

 LIU Weixin  LI Zhen  XIAO Yinfeng  WU Qinzhi  WANG Kunshu  XUAN Ming   

  1. (No.808th Institute of Shanghai Academy of Spaceflight Technology, Shanghai 201109, China)
  • Received:2015-03-13 Revised:2015-05-06 Online:2015-06-20 Published:2015-06-12

Abstract:

Ionizing radiation effects of typical clock oscillator and its internal oscillator circuit SM5009 for satellite was studied by 60Co γ-rays in this thesis. Output signal amplitude and supply current of clock oscillator were measured under irradiation conditions. Relationship between the change of these parameters and the failure of SM5009 oscillator circuit was also analyzed. The results showed that the field oxygen parasitic leakage of SM5009 was very severe under irradiation, and the leakage current could increase to 10−4 A when the absorbed dose accumulated to 1500 Gy(Si). It was a significant reason that caused the supply current of clock oscillator increase. Meanwhile the high level of output voltage was sensitive to absorbed dose for SM5009. The high level of output voltage decreased for 0.5 V when the absorbed dose accumulated to 1500 Gy(Si). This was an important reason that caused the output signal amplitude of clock oscillator decrease.

Key words: Clock oscillator, Ionizing radiation effects, Oscillator circuit

CLC Number: 

  • TN45,TL81