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

who can tell me some hot topics in rf ic design?

Status
Not open for further replies.

firewind

Member level 1
Joined
Jun 7, 2005
Messages
36
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Location
Milky Way
Activity points
1,535
design linear PA with high efficiency
duplex filter are extremely big and bulky, come up with a scheme to shrink it
 

freetofree

Member level 1
Joined
Mar 21, 2007
Messages
32
Helped
4
Reputation
8
Reaction score
2
Trophy points
1,288
Activity points
1,485
why linear PA? Doesn't polar transmitter technique handle this? Lots of modulation techniques such as GSM use phase but not envelop, so isn't nonlinear PA enough?
 

firewind

Member level 1
Joined
Jun 7, 2005
Messages
36
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Location
Milky Way
Activity points
1,535
nonlinear PA is the problem, it's the nonlinearity that makes it more complex and expensive to build. More than often that nonlinearity will broaden your spectrum and thus causing problems. Sure there are tricks to reduces it but adding those tricks to your mobile device requires +++ ckts = increase cost of power and $$$ to build
 

    freetofree

    points: 2
    Helpful Answer Positive Rating

khouly

Advanced Member level 5
Joined
Oct 20, 2003
Messages
2,368
Helped
461
Reputation
916
Reaction score
101
Trophy points
1,343
Location
EGYPT
Activity points
13,244
till now , the PA's in the market are done in GaAs , or InP , only Silabs has the Si PA ,
u can work in PA , till now linear PA with high effeciny is required

khouly
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top