Impedance

Tuned Circuits & Filters

  • Theoretical impedance of a series resonant circuit is zero – it is an acceptor circuit and will either short out or pass signals through at resonant frequency depending on how connected
  • Theoretical impedance of a parallel resonant circuit is infinity – it is a rejector circuit and will either block signals at resonant frequency or short out signals not at resonant frequency depending on how connected
  • These acceptor and rejector circuits form the basis of tuned circuits and filters