| More recently, the ever-increasing use of mobile communications and broadcast media channels has put huge pressure on the available frequency spectrum. Regulatory authorities are going to higher frequency spectrum, squeezing band allocations closer and closer together, relying on increasingly sophisticated EMC design methods, especially in the digital processing arena so as to keep cross-channel interference to acceptable levels. Digital systems are inherently less susceptible than the old analog systems, and also offer far easier ways (such as software) to implement highly sophisticated protection measures. But use of very high switching speed devices has brought in additional constraints in the systems. Many a times a major design constrains in these systems is from EMI and EMC compliance. Similarly in Medical equipment, new technology is being used and the performance has to comply EMI/ EMC norms considering patients safety. The use of higher clock frequency puts in additional limitations owing to EMI/ EMC issues.
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