What is an Akerberg Mossberg Filter?
Problem:
What is an Akerberg Mossberg Filter?
Solution:
An Akerberg Mossberg filter is a two pole filter topology. It is available in low pass, high pass, bandpass, and notch versions. It is one of three topologies that offer complete and independent control over gain, frequency,
and type (Butterworth, Chebyshev, and Bessel). Signal input is at different places for the
different versions, but output is always taken from the same point.
The Akerberg Mossberg topology is suited to operation from a single supply. Current feedback amplifiers cannot be used, because a capacitor is connected from the
op amp output to inverting input. The Akerberg Mossberg topology can be used with fully differential amplifiers, with the additional advantage that the number
of opamps required is reduced from 3 to 2.
Schematics for Akerberg Mossberg filters can be found at: