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.

Detecting parasitics?

Status
Not open for further replies.

Veriloger

Newbie level 4
Joined
Mar 12, 2012
Messages
7
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,283
Activity points
1,376
Is there a way to approximate the parasitics of a circuit at a given frequency by measuring the response waveform from an input? Would an FFT highlight anything?
 

crutschow

Advanced Member level 5
Joined
Feb 22, 2012
Messages
3,857
Helped
919
Reputation
1,836
Reaction score
905
Trophy points
1,393
Location
L.A. USA Zulu -8
Activity points
21,787
You could, if you knew the circuit low frequency impedance, by measuring the rolloff of the response with frequency.
 

Veriloger

Newbie level 4
Joined
Mar 12, 2012
Messages
7
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,283
Activity points
1,376
You could, if you knew the circuit low frequency impedance, by measuring the rolloff of the response with frequency.

Please could you explain further or give me some buzz words that i could use to search for pages that will explain it?
 

dick_freebird

Advanced Member level 5
Joined
Mar 4, 2008
Messages
7,281
Helped
2,126
Reputation
4,257
Reaction score
1,982
Trophy points
1,393
Location
USA
Activity points
58,396
One problem is, for a circuit of some complexity, the
parasitics are distributed and can combine in many
ways (in the same circuit). You can have shunt and
feedforward, in various places and proportions. A
single-pole or few-pole, or few-poles-plus-zeroes,
might be discernible in the details from a gain/phase
vs frequency plot (if you have the schematic in hand)
but how many can sit on top of each other and still
let you pick them out of the tangle, quantitatively?
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top