Ticari olarak kullanılan 555 tekli zamanlayıcı ve 741 işlemsel yükselteç (op-amp), Co-60 kaynağının gama ışını radyasyonu altında incelenmiştir. Işınlama için maksimum toplam dozlar 2 kGy ve 4 kGy kullanılmıştır. 744 Gy gama ışını radyasyonlarında 202 Hz'den 195 Hz'e düşen 555 tekli zamanlayıcı devre frekansında anormal davranış gözlemlenmiştir. 741 op-amp devresinin sonuçlarında, 741 op-amp'in genlik sinyali 4 kGy gama dozunda maksimum -0,054 dB değerini göstermektedir ve yükselme eğimi 4'ten 0,65 V/µs'ye düşmüştür. 555 tekli zamanlayıcının iki pn bağlantısı vardır ve bu diyotlar 555 tekli zamanlayıcının gama radyasyonundan kolayca etkilenmesine neden olmaktadır. Sonuç olarak, entegre devrelerin radyasyon ortamlarındaki direnç sınırlarının belirlenmesi için test edilmesi gerekmektedir.
The commercial used the 555 single timer and the 741 operational amplifiers (op-amp) were investigated under the gamma-ray radiation of the Co-60 source. The maximum total doses were used 2 kGy and 4 kGy to irradiate. The abnormal behavior in the 555 single timer circuit frequency was observed, which decreased from 202 to 195 Hz at 744 Gy gamma-ray radiations. In the results of 741 opamp circuit, the amplitude signal of the 741 op-amp shows a maximum value of -0.054 dB at 4 kGy gamma dose and its slew rate decreases from 4 to 0.65 V/µs. The 555 single timer has two pn junctions and these cause that the 555 single timer is easily affected by the gamma radiation. Consequently, the integrated circuits must be tested to determine their resistance limits in the radiation environments.
| Primary Language | English |
|---|---|
| Subjects | Electrical Engineering, Nuclear Engineering |
| Journal Section | Research Articles |
| Authors | |
| Publication Date | April 30, 2023 |
| Submission Date | March 31, 2022 |
| Acceptance Date | March 30, 2023 |
| Published in Issue | Year 2023 Volume: 28 Issue: 1 |
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