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.

Crosstalk effect in IC...

Status
Not open for further replies.

sohiltri

Member level 5
Joined
Dec 16, 2006
Messages
81
Helped
6
Reputation
12
Reaction score
1
Trophy points
1,288
Activity points
1,750
"RElative high output impedance makes the circuit very sensitive to crosstalk "....
Can anyone explain me how???
 

amriths04

Full Member level 5
Joined
Jul 15, 2006
Messages
266
Helped
23
Reputation
46
Reaction score
9
Trophy points
1,298
Activity points
2,831
incase your adjacent wire's impedance is higher than your wire's impedance, then there will be a larger amount of electric field(analogous to voltage drop) across the higher impedance giving rise to cross-talks.
 

A.Anand Srinivasan

Advanced Member level 5
Joined
Oct 15, 2005
Messages
1,804
Helped
257
Reputation
514
Reaction score
39
Trophy points
1,328
Location
India
Activity points
10,680
i dont understand what you are trying to ask... are you talking about IC pins are adjacent wires....
 

sohiltri

Member level 5
Joined
Dec 16, 2006
Messages
81
Helped
6
Reputation
12
Reaction score
1
Trophy points
1,288
Activity points
1,750
No ....

it speaks for any gate high output impedance makes circuit very sensitive to cross talk in book Rabaey.....

can u explain crosstalk wrt this staemant also???
 

A.Anand Srinivasan

Advanced Member level 5
Joined
Oct 15, 2005
Messages
1,804
Helped
257
Reputation
514
Reaction score
39
Trophy points
1,328
Location
India
Activity points
10,680
crosstalk is the phenomenon of the signal from a adjacent line getting coupled... the main idea here is that a small current across a high impedance causes a lot of voltage...

whenever a gate or something switches it consumes a lot of current and after switching this leads to the peaking up of current throughout the circuit (ringing current) and hence this causes significant change in the gates with high impedance...
this is why TTL gates which are not used are generally tied high or low(suitably)...
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top