# Practical Electronics/High Pass Filter

## Low Pass FilterEdit

### RL NetworkEdit

- 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 NetworkEdit

- 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

## SummaryEdit

In general

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

- T = RC for RC network
- for RL network