Low pass filter (adding resistor parallel with capacitor )

Thread Starter

karas

Joined Sep 8, 2011
208
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
1,136
Ummm... Capacitive reactance? And RC filtering freq? Paralleling a Cap with Re on xstr CE amp to increase gain?
 

LvW

Joined Jun 13, 2013
842
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
19,270
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
31
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
20,044
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
 

SamR

Joined Mar 19, 2019
1,136
You may also find some members do not wish to communicate in that manner and it will not show on the profile for them.
 
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