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Design and Implementation of Analog Flat Bandpass Filter

Digital communication baseband equipment needs to test the bit error rate and threshold in the passband through the if noise generator. The flatness and cut-off frequency of the signal passband of the if noise generator will affect the measurement accuracy. The design idea is to adopt the method of analog filtering and digital filtering. This paper discusses the design and implementation of analog flat bandpass filter. Through the research of LC filter, the design value of LC element is obtained, the simulation calculation and verification test of analog filter are carried out, and the suitable scheme meeting the design index is obtained.