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

Which surface mount common-mode choke I should use?

Status
Not open for further replies.

EDA_hg81

Advanced Member level 2
Joined
Nov 25, 2005
Messages
503
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,298
Activity points
4,875
I want to double the output level of driver from 5V to 10V, Which surface mount common-mode choke I should use?

Thanks.
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
47,959
Helped
14,147
Reputation
28,553
Reaction score
12,832
Trophy points
1,393
Location
Bochum, Germany
Activity points
278,226
Depends on
- the operation frequency
- the driver impedance
 

    EDA_hg81

    points: 2
    Helpful Answer Positive Rating

EDA_hg81

Advanced Member level 2
Joined
Nov 25, 2005
Messages
503
Helped
2
Reputation
4
Reaction score
2
Trophy points
1,298
Activity points
4,875
it is 40Mhz and the impedence is 100ohm

Thanks.
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
47,959
Helped
14,147
Reputation
28,553
Reaction score
12,832
Trophy points
1,393
Location
Bochum, Germany
Activity points
278,226
A 100 uH to 1000 uH choke with a could coupling (low differential mode impedance respectively leakage inductance). I previously used Wuerth SL2 for a similar 13.56 MHz transformation. At 40 MHz, you have a considerable effect of leakage inductance, it would be possible better to use a mini-circuits RF transformer.

As another point, the transformer output is loaded with 100 ohm, so the input impedance is about 25 ohm.
To achieve an voltage increment at all, the driver impedance must be below 25 ohm.
 

    EDA_hg81

    points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top