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

series /parallel diode linearizer

Status
Not open for further replies.

bhatt_190487

Member level 1
Joined
Oct 1, 2006
Messages
36
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,541
Can anybody explain the function of series or parallel diode linearizer? or suggest me some references which contains the detailed explanation for it?
 

chuckey

Advanced Member level 5
Joined
Dec 26, 2010
Messages
4,863
Helped
1,308
Reputation
2,622
Reaction score
1,281
Trophy points
1,393
Location
Southampton and holiday cottage in Wensleydale (UK
Activity points
31,695
There are two types, one type relies on the curve of the current against voltage of a forward biased diode.More then one diode can be used too give an extended voltage range. The other type regards the diode as "perfect" and uses different series resistors and DC bias voltages so the circuit sees a different impedance depending on which diodes are turned on by the DC bias being exceeded. The diode network is often used as part of the feedback network of an amplifier, so the diodes losses can be compensated for.
Frank
 

bhatt_190487

Member level 1
Joined
Oct 1, 2006
Messages
36
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,541
Thank you Sir for your reply . Here you mentioned about different impedances .Impedances means attaining different dynamic impedance of the diode? I am dealing with the parallel diode linearizer. I have take Rbias as 2kohm with Vds =5V bias supply and supplying Rf supply from -20 dBm to 20dBm. I am trying to plot the change in dynamic resistance with respect to increase in rf power supply . As per some papers ,the dynamic resistance should increase as the rf power supply increases but here my dynamic resistance decreases after 5dBm.Can you tell me why it is so?
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top