Practical Electronics/Low Pass Filter
Low Pass Filter
editLR Network
edit- 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 Network
edit- 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
Summary
editIn 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