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宽带通用PIN衰减器
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类别: 消费电子
时间:2020-04-09
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宽带通用PIN衰减器Application Note A Wideband General Purpose PIN Diode Attenuator APN1003 Introduction PIN diode based AGC attenuators are commonly used in many broadband system applications such as: cable or fiberoptic TV, wireless CDMA, etc. A popular attenuator design utilized over the instantaneous frequency range from 10 MHz to beyond 2 GHz is the PI network. The benefit of this design is its broadband constant impedance, wide dynamic range and good compatibility with AGC signals. The PIN diode is used as a current controlled resistance component in the PI network. PIN diodes are low cost, low distortion elements available in commonly used small size plastic packages. This application note describes the design of a high performance, PIN based 4 diode PI attenuator utilizing Alpha’s low cost SMP1307-0……
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