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216results about How to "Reduce circuit cost" patented technology

Filtering device and power supply system

An embodiment of the invention provides a filtering device and a power supply system. The filtering device is connected between an external power supply and equipment and comprises a feedback-type active common-mode filter and a feedforward-type active common-mode filter. The feedback-type active common-mode filter comprises a common-mode noise detection device and a first filtering circuit. The feedforward-type active common-mode filter comprises the common-mode noise detection device and a second filtering circuit. The first filtering circuit is connected between the common-mode noise detection device and the equipment and is used for carrying out feedback-type filtering on a first common-mode noise signal to obtain a second common-mode noise signal; the common-mode noise detection device is connected between the first filtering circuit and the second filtering circuit and is used for detecting the second common-mode noise signal and providing the second common-mode noise signal to the second filtering circuit; and the second filtering circuit is connected between the external power supply and the common-mode noise detection device and is used for carrying out feedforward-type filtering on the second common-mode noise signal. The filtering device and power supply system can effectively improve filtering efficiency of the common-mode noises to some extent.
Owner:HUAWEI TECH CO LTD

Power supply circuit for plasma generation, plasma generating apparatus, plasma processing apparatus and plasma processed object

A power supply circuit for plasma generation by which a large quantity of generated plasma can be smoothly obtained without increasing the sizes of an apparatus, a plasma generating apparatus, a plasma processing apparatus which can process a large quantity of objects to be processed at a low cost by using the plasma generating apparatus, and plasma processed objects having target quantities are realized. An electric discharge generating electrode is composed of two or more first electrodes and one or more second electrodes. An LC series circuit is provided by connecting a capacitor C and a coil L in series between one of outputs of an alternating high voltage generating circuit which generates an alternating high voltage to be applied between the electrodes of electric discharge generating electrode, and the first electrode. When electricity is discharged in one of the electrode pair, voltage drop is suppressed by the coil even when the electric discharge of capacitor progresses, and since electric discharge from the other electrode pair is induced without being disturbed, a large quantity of plasma can be smoothly generated by common use of the alternating high voltage generating circuit.
Owner:HIROFUMI TAKIKAWA +1
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