Elektor Team
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Active Band-Pass Filter up to 5 MHz

Constructing an active bandpass filter is greatly simplified by using the LT1567 from Linear Technology (www.lineartech.com/pdf/1567i.pdf). The circuit shown here uses relatively few external components to build a 2nd order bandpass filter with a centre frequency of 1 MHz and a –3 dB bandwidth of 0.71 MHz. The centre frequency gain will be unity. The circuit should be driven from a low impedance source so that R1 will define the circuit gain.
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