Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics 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

How could I make an quadrature signal or combiner?

Status
Not open for further replies.
W

wccheng

Full Member level 5
Joined
May 16, 2004
Messages
287
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,296
Activity points
2,710
Dear all,

I design a quadrature LO input and IF quadrature combiner down-conversion mixer now. However, I don't know how could I create them? I have tried to use some model in rfLib. It has BB_shifter_spillter and BB_shifter_combiner. However, the 4 output will provide different voltage swing even the phase in quadrature. Could anyone teach me?

Thanks

wccheng
 

It depends. If IF is baseband then typically these signals are generated with DACs. If the IF signal is not baseband you can create 90° splitter with polyphase filters.
 

Are you designing an image reject mixer? What is your frequency and bandwidth of your LO and IF?

That will determine what method is best.

Yoda
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top