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Engineering LibreTexts

11: Active Filters

  • Page ID
    3613
  • Learning Objectives

    After completing this chapter, you should be able to: 

    • Describe the four main types of filters.
    • Detail the advantages and disadvantages of active versus passive filters. 
    • Describe the importance of filter order on the shape of a filter's response. 
    • Describe the importance of filter alignment on the shape of a filter's response. 
    • Compare the general gain and phase response characteristics of the popular filter alignments. 
    • Analyze high- and low-pass Sallen and Key filters.
    • Analyze both low and high Q band-pass filters. 
    • Analyze state-variable filters.
    • Analyze notch filters.
    • Analyze cascaded filters of high order. 
    • Detail the operation of basic bass and treble audio equalizers. 
    • Explain the operation of switched capacitor filters, and list their relative advantages and disadvantages compared to ordinary op amp filters.