Low pass filter (adding resistor parallel with capacitor )

Thread Starter

karas

Joined Sep 8, 2011
209
why in low pass filter we sometimes add resistor in parallel with capacitor ( it just doing bleeding and discharge the cap. Or it has another job?)
Thanks,
 

SamR

Joined Mar 19, 2019
2,014
Ummm... Capacitive reactance? And RC filtering freq? Paralleling a Cap with Re on xstr CE amp to increase gain?
 

LvW

Joined Jun 13, 2013
963
why in low pass filter we sometimes add resistor in parallel with capacitor ( it just doing bleeding and discharge the cap. Or it has another job?)
Thanks,
Yes - the "job" depends on the particular circuit.
That means: A general answer cannot be given.
Example: A damped opamp-based integrator is a first-order lowpass circuit.
In this configuration the parallel R is necessary to avoid saturation of the opamp (which needs a resistive negative feedback).
 

MrChips

Joined Oct 2, 2009
20,870
Sir may i have your email? i wanna have a cooperation with you.
Personal email addresses are not shared on AAC forums.
If you wish to communicate with a member use PM (personal message). Click on the member's name or avatar (screen icon) and "Start a Conversation".
 

nextofyourpcb

Joined Aug 6, 2019
32
Personal email addresses are not shared on AAC forums.
If you wish to communicate with a member use PM (personal message). Click on the member's name or avatar (screen icon) and "Start a Conversation".
OK thanks for your help. But i can see anything at their profile.
I didn't see the button of "Start a Conversation".
 

bertus

Joined Apr 5, 2008
20,449
Hello,

New members can not initiate a conversation until they reach 10 posts.
A senior member can initiate a conversation with a new member.
The new member can reply to that.

Bertus
 
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