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Multiple Feedback Topology Electronics




Multiple feedback topology is an Electronic Filter Topology which is used to implement an Electronic Filter by adding two poles to the Transfer Function . A diagram of the circuit topology for a second order low pass filter is shown in the figure on the right.

The transfer function of the multiple feedback topology circuit is:

:H(s) = rac{V_o}{V_i} = rac{1}{As^2+Bs+C}

where:
:A = (R_1R_3C_2C_5)\,
:B = R_3C_5+R_1C_5+R_1R_3C_5/R_4\,
:C = R_1/R_4\,


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