14.78kHz Sallen Key low pass filter

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14.78kHz Sallen Key low pass filter

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The use of T/Y feedback network allows the use of three lower resistances instead of single very high resistance. The need for this configuration arises when there is a requirement for a large gain and a minimum input impedance. These requirements can result to a very large feedback resistance, if this feedback resistance is impractical the designer will resort to the T/Y feedback. The parameters in this example may not be compelling enough for a designer to opt for the T/Y feedback network but it serves to illustrate the concept. The output in the circuit is ideally -12 V, the gain is -60 so it would have required a single 600 kOhms resistor.

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14.78kHz Sallen Key low pass filter (1)

user-863684

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user-863684

2 Circuits

Date Created

8 hours, 8 minutes ago

Last Modified

8 hours, 8 minutes ago

Tags

  • inverting amplifier
  • circuit fundamentals
  • op-amp circuits
  • y feedback
  • t feedback

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