Practical Electronics/Band Pass Filter

Band Pass Filter

Band Pass Filter can be constructed from joining Low Pass Filter network with High Pass Filter network . Therefore, Band Pass Filters can be constructed from joining

LR and CR

RC and RL

Band Pass Filter LR + CR

Band Pass Filter LR + CR has a stable voltage over a band of frequencies from ${\frac {R}{L}}$ to ${\frac {1}{RC}}$ as long as

${\frac {1}{RC}}>{\frac {R}{L}}$

$R<{\frac {L}{C}}$

Band Pass Filter RC + RL

Band Pass Filter RC + RL has a stable voltage over a band of frequencies from ${\frac {1}{RC}}$ to ${\frac {R}{L}}$ as long as

${\frac {R}{L}}>{\frac {1}{RC}}$

$R>{\frac {L}{C}}$

Summary

In general Band Pass Filter can be constructed by joining

1. RC and RL that has a band pass from ${\frac {1}{RC}}$ to ${\frac {R}{L}}$
2. LR and CR that has a band pass from ${\frac {R}{L}}$ to ${\frac {1}{RC}}$

bhar main ja

Filters	Band Pass	R,L,C 's Value
LR - CR	${\frac {R}{L}}-{\frac {1}{CR}}$	${\frac {1}{CR}}>{\frac {R}{L}}$
RC - RL	${\frac {1}{CR}}-{\frac {R}{L}}$	${\frac {R}{L}}>{\frac {1}{CR}}$