Sunday, 24 May 2015

amplifier - Should I use a passive or an active filter?


schematic


simulate this circuit – Schematic created using CircuitLab


I need to design an am receiver as a project. On the front end I have three modules; BPF1 the "roofing filter" or the "pre-select filter", BPF2 to further "protect" the demodulator, and an RF amplifier between these two filters. Should my filters be passive or active?


The block diagram above shows what I am designing.





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