What would be the ideal MOSCAP dimension?

Status
Not open for further replies.

hrkhari

Full Member level 4
Joined
Mar 4, 2004
Messages
223
Helped
6
Reputation
12
Reaction score
3
Trophy points
1,298
Activity points
2,250
Hi Guys

What would be the ideal MOSCAP dimension utilized at power supply rail to ground undesired ac noise for high frequency application?Does this dependant on the frequency of application?.Thank You

Rgds
 

Re: MOSCap

I guess you can use all the area left after your layout.
 

Re: MOSCap

Dear hrkhari,
We all would like our supplies to be as quiet as possible. But does not happen so.
Your system shall have high PSRR at low frequencies, so it takes care. But after the first dominant pole of the system the PSRR starts to worsen. So look at the frequency where the PSRR is not meeting your minimum expectations, have a cap to take care of frequencies beyond that.
As vistapoint suggested att the area u are not using one can use that. All the dummies of transistor could be configured as cap.
As such we would be using a cap at supply input pin
hope it helps
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…