Can u explain about passive filter networks?

Question

What is the difference between it and active filter networks?
Can you explain more about 5th order butterworth?
Give me more examples about passive filter networks with brief explanation...
I will appreciate if u give me useful references...

Answer 1

The difference between passive and active filter networks is that passive networks contain no components that produce amplification. That is to say they contain only resistive, inductive and capacitive components.
Passive filters come in two main forms, series and parallel.
A series L/C network will pass maximum AC current at its resonant frequency while a parallel L/C network will pass minimum AC line current at resonance.
With minimum resistance the graph of the response will be fairly sharp but as resistance increases the frequency response will become wider.

~ -------- L ------ C ------ ~ series

~ ---|---- L ------|--- ~ parallel
......|---- C ------|

Answer 2

Here are two examples. Filtering in electronics comes in passive & active. In passive it is fixed as to what it can do such as a band pass filter. It will pass only that band of frequencies until it fails and will not change unless you change a component of that filter. In an active filter it will adapt or change depending on a given input or inputs automatically. This could be done digitally. The same applies to power systems. Set a transformer tap at 1.05 and it stays there until someone comes along and changes it. In an active system there would be sensors that monitor say voltage and as the voltage sags or surges due to load changes during the course of a day, the controls will automatically adjust the transformer taps up or down. Of course this cannot be done for rapid changes as tap changing takes time and usually in discrete steps.

Answer 3

Try link below!