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应用笔记3700

用于MAX3580的前端双工滤波器

摘要:本应用笔记介绍了一个双工滤波器方案,仅由五个电容和两个电感组成,用于MAX3580直接变换DVB-T调谐器。在噪声系数下降不到0.8dB的前提下,二阶截点(IIP2)提高至少25dB。调谐到VHF频段时,该滤波器提供与UHF频段之间15dB的隔离度;而调谐到UHF频段时,滤波器提供与VHF频段之间32dB的隔离度。


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