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,

 

Ummm... Capacitive reactance? And RC filtering freq? Paralleling a Cap with Re on xstr CE amp to increase gain?

 

Do you have an example?

 

A series resistor feeding a resistor to ground is an attenuator to all frequencies. The capacitor to ground rolls off higher frequencies.

 

Changes G and corner frequency -

http://tuttle.merc.iastate.edu/ee230/topics/filters/filters_first_order.pdf Page 11


Regards, Dana.

 

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).

 

A series resistor feeding a resistor to ground is an attenuator to all frequencies. The capacitor to ground rolls off higher frequencies.

Sir may i have your email? i wanna have a cooperation with you.

 

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".

 

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".

 

When you click their ID name you get -



Middle of the above image is "Start a Conversation"


Regards, Dana.

 

When you click their ID name you get -

View attachment 183525

Middle of the above image is "Start a Conversation"


Regards, Dana.

Thanks for ur help bro

 

When you click their ID name you get -

View attachment 183525

Middle of the above image is "Start a Conversation"


Regards, Dana.

you can see this is on my computer,i didn't see that button bro.

 

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

 

You may also find some members do not wish to communicate in that manner and it will not show on the profile for them.

 

OK thanks for your help sir.now i understand.