검색 결과: EXCCET103U
in EMI/RFI Electronic Filters
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부품 번호 EXCCET103U 에 대한 견적을 받으려면 품목을 선택하시거나 이 페이지 하단의 부품 번호 {1} 내에서 검색을 세분화 하세요.
아직은 브로커포럼의 회원사로 가입 준비가 되지 않으셨다면
무료로 EXCCET103U 판매자에게 연락하실 수 있습니다.
EMI/RFI Electronic Filters
Integrated circuits are often a source of EMI, but they must usually couple their energy to larger objects such as heatsinks, circuit board planes and cables to radiate significantly. On integrated circuits, important means of reducing EMI are: the use of bypass or decoupling capacitors on each active device (connected across the power supply, as close to the device as possible), rise time control of high-speed signals using series resistors, and VCC filtering. Shielding is usually a last resort after other techniques have failed, because of the added expense of shielding components such as conductive gaskets. Interference in radio astronomy, where it is commonly referred to as radio-frequency interference (RFI), is any source of transmission that is within the observed frequency band other than the celestial sources themselves. Because transmitters on and around the Earth can be many times stronger than the astronomical signal of interest, RFI is a major concern for performing radio astronomy. Natural sources of interference, such as lightning and the sun, are also often referred to as RFI. Some of the frequency bands that are very important for radio astronomy, such as the 21-cm HI line at 1420 MHz, are protected by regulation due to spectrum management. However, modern radio-astronomical observatories such as VLA, LOFAR and ALMA have a very large bandwidth over which they can observe. Because of the limited spectral space at radio frequencies, these frequency bands can not be completely allocated to radio astronomy. Therefore, observatories need to deal with RFI in their observations.
EMI/RFI Electronic Filters > EMI Filter
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