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CIRCUIT060055

Multiple feedback band-pass filter circuit

CIRCUIT060055

Overview

This circuit is a 2nd-order multiple feedback (MFB) band-pass (BP) filter. This BP filter is created by cascading a low-pass and a high-pass filter. Vref provides a DC offset to accommodate for single-supply applications.
Features
  • Input: Vi = -2.45 V to 2.45 V
  • Output: Vo = 0.05 V to 4.95 V
  • Supply:
    • Vcc = 5 V
    • Vee = 0 V
  • Gain: 1 V/V
  • Low cutoff frequency: 1 kHz
  • High cutoff frequency: 10 kHz
  • Vref = 1.25 V and 2.5 V
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Technical documentation

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Type Title Date
* Circuit design Single-supply, 2nd-order, multiple feedback band-pass filter circuit PDF | HTML Jun 28, 2021
Application note FilterPro™ MFB and Sallen-Key Low-Pass Filter Design Program User Guide (Rev. C) Feb 25, 2011
Application note Basic Introduction to Filters - Active, Passive, and Switched-Cap (Rev. A) Apr 21, 2010
Analog design Journal Using infinite-gain, MFB filter topology in fully differential active filters Jul 14, 2009

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