Multiple feedback topology (electronics)
- 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, like all second-order linear filters, is:
:.
In an MF filter,:::
: is the Q factor.: is the DC voltage gain: is the corner frequency
References
* [http://www.analog.com/UploadedFiles/Application_Notes/447952852AN-649_0.pdf Using the Analog Devices Active Filter Design Tool Application]
* [http://focus.ti.com/lit/an/slyt143/slyt143.pdf "Fully differential amplifiers applications"] by Jim Karki 2001
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