Practical Electronics/High Pass Filter

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Low Pass Filter[edit]

RL Network[edit]


Plot three points above we have a graph . From graph, we see voltage does not change with frequency on High Frequency therefore RL network can be used as High Pass Filter


CR Network[edit]


Plot three points above we have a graph . From graph, we see voltage does not change with frequency on High Frequency therefore LR network can be used as High Pass Filter

Summary[edit]

In general

  1. High Pass Filter can be constructed from the two networks RL or CR network .
  2. High Pass Filter has stable voltage does not change with frequency on Low Frequency .
  3. High pass filter can be expressed in a mathematical form of
T = RC for RC network
for RL network