Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Q of two parallel trimmer caps

Status
Not open for further replies.

y99lx

Member level 1
Joined
Jul 29, 2009
Messages
39
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,490
Hi,
I want to parallely connect two trimmer capacitors to get a high capacitance. I want to know whether the final Q is still equal to the Q of each cap.

Thank you.
 

timof

Advanced Member level 2
Joined
Feb 21, 2008
Messages
613
Helped
205
Reputation
410
Reaction score
198
Trophy points
1,323
Activity points
6,566
If parallel connection does not introduce additional series resistance, then (assuming that the original capacitor had capacitance C, series resistance R, and thus quality factor Q=1/(omega*R*C)), the series resistance of the "super"-capacitor (i.e. two original capacitors connected in parallel) is R'=R/2, and total capacitance is C'=2C, so its quality factor Q'=1/(omega*R'*C')=1/(omega*R*C)=Q is the same as that of the original capacitor.
 

y99lx

Member level 1
Joined
Jul 29, 2009
Messages
39
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,490
Thank you so much.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top