No abstract

In this work a novel radiation tolerance technique based on modular redundancy, associated to an alternated biasing scheme, is presented. The goal of this technique is to extend electronic systems lifetime in radiation environments for circuits that are susceptible to TID effects. In order to validate this technique, a board level prototype was built, considering an FPAA (Field Programmable Analog Array) as Device Under Test (DUT), to which the concept was applied. The prototype was exposed to Co60 gamma radiation with a dose rate of 1krad(Si)/h. Results show that devices that are alternated biased are able to tolerate higher accumulated doses than the one that is permanently biased.

Many types of industries require their plants to be geographically located at distant points from the headquarters that control their administrative operations. For example, basic industries such as mining, oil and gas and energy, which transform raw materials for use in other processes, usually have their facilities close to primary sources, imposing the need to implement a remote monitoring strategy. This work presents a remote interconnection solution between a field device of a wirelessHART network and a remote operator collecting related latency data, at the time of its measurement, in a secure and reliable way through the use of a virtual private network on the Internet. Measurements were performed at regional and international locations and statistical comparisons of the results were performed.