By imitating of the design characters of the high frequency circuit, the origin and the classification of the noise interferences of the low field NMR circuit system are analyzed.

此外本文参照高频电路的设计特点，分析了低场磁共振信号放大电路的噪声干扰来源，给出了一些减少噪声干扰的具体措施。

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Widely used in electronic ballast and other and other high voltage, high frequency circuit.

广泛用于节能灯，电子镇流器以及其它高频、高压电路。

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Industrial high performance foams fine celled polyurethane foams cellular silicone foams liquid silicone rubber high frequency circuit materials flexible circuit materials.

工业用高性能泡绵、微细孔聚氨脂泡沫材料、多孔硅泡沫材料、液体硅橡胶、高频印刷线路板材料、柔性印刷线路板材料。

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The SEC has already proposed a number of changes designed to address their growing influence, including extra restrictions on broker-dealers that provide direct market access to high frequency traders, a trader tracking system for large traders, circuit breakers that would slow trading in individual stocks if they fall more than 10%, and new rules for off-exchange trading venues.

FORBES: SEC Wants Real Time Trading Data