# Practical Electronics/Low Pass Filter

## Low Pass FilterEdit

### LR NetworkEdit

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

### RC NetworkEdit

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

## SummaryEdit

In general

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

- T = RC for RC network
- for RL network