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Electromagnetic emanation exploration in FPGA-based digital design
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Journal Article
Electromagnetic emanation exploration in FPGA-based digital design
2019
Overview
As semiconductor technologies have been shrinking, the speed of circuits, integration density, and the number of I/O interfaces have been significantly increasing. As a consequence, electromagnetic emanation (EME) becomes a critical issue in digital system designs. Electronic devices must meet electromagnetic compatibility (EMC) requirements to ensure that they operate properly, and safely without interference. I/O buffers consume high currents when they operate. The bonding wires, and lead frames are long enough to play as efficient antennas to radiate electromagnetic interference (EMI). Therefore, I/O switching activities significantly contribute to the EMI. In this paper, we evaluate and analyze the impact of I/O switching activities on the EME. We will change the circuit configurations such as the supply voltage for I/O banks, their switching frequency, driving current, and slew rate. Additionally, a trade-off between the switching frequencies and the number of simultaneous switching outputs (SSOs) is also considered in terms of EME. Moreover, we evaluate the electromagnetic emissions that are associated with the different I/O switching patterns. The results show that the electromagnetic emissions associated I/O switching activities depend strongly on their operating parameters and configurations. All the circuit implementations and measurements are carried out on a Xilinx Spartan-3 FPGA.
Publisher
Springer Nature B.V
