Improved method for simulating total radiation dose effects on single and composite operational amplifiers using PSPICE
Dufour, David M.
Michael, Sherif N.
Parker, Andrew A.
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This research is part of a continued effort to simulate the effects of total dose radiation on the performance of single and composite operational amplifiers using PSPICE. This research provides further verification that the composite operational amplifier has a superior performance to the single operational amplifier while operating in a radiation flux. In this experiment, a single and composite op amp were constructed in PSPICE and implemented in a finite gain amplifier circuit. The effects of ionizing radiation were simulated by varying the parameters of the components that made up the op amps. These component parameters were varied in ways that would mimic the response of the actual components that were irradiated in previous research. The simulations were incrementally run to simulate an increasing radiation dose. The results of these simulations were then compared with the results of an actual study conducted at Naval Postgraduate School where similar circuits were irradiated using the school's LINAC. This procedure proved to be an improved method for predicting the effects of total dose radiation for radiation hardened devices and provided additional confirmation of the superior performance of the composite op amp over the single op amp.
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