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.

How to evaluate an operational amplifer performance?

Status
Not open for further replies.

samuel

Full Member level 3
Joined
Nov 15, 2004
Messages
171
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,296
Location
world
Activity points
1,141
Hello,
Everyone, recently I had designed an operational amplifier , but i dont know if its performance is what I want . I want to know how to simulate its perforamce parameters such as unit gain, dc gain,open loop gain, phase margin,gain bandwidth product and noise evaluation and so on.


any one can tell me how to do that in details? at best tutorials or manual.

thanks in advance.

sm.
 

suria3

Full Member level 5
Joined
Mar 5, 2004
Messages
304
Helped
17
Reputation
34
Reaction score
5
Trophy points
1,298
Activity points
3,042
Hi,

You can refer to the book "CMOS Analog Circuit Design" by Phillip E. Allen & Douglas R.Holberg. This book teach you both the teory and practical way on measuring the opamp. Besides that. there are many journals and articles on internet regarding opamp, u can simply search them in google.

Regards,
Suria3.
 

Syukri

Full Member level 5
Joined
Aug 9, 2005
Messages
252
Helped
24
Reputation
48
Reaction score
10
Trophy points
1,298
Location
Malaysia
Activity points
3,954
How about differential amp. analysis...can it use the same method?
 

nathan

Newbie level 1
Joined
May 17, 2001
Messages
0
Helped
5
Reputation
10
Reaction score
3
Trophy points
1,282
Activity points
641
See attached presentation from cadence.

nathan
 

    samuel

    Points: 2
    Helpful Answer Positive Rating

samuel

Full Member level 3
Joined
Nov 15, 2004
Messages
171
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,296
Location
world
Activity points
1,141
See attached presentation from cadence.


to nathan,

i dont have attached presentation from candece, where to find it?

thx.


sm.
 

tony_wu_ad

Member level 3
Joined
Sep 3, 2005
Messages
61
Helped
3
Reputation
6
Reaction score
1
Trophy points
1,288
Activity points
1,797
You can find a OP DataSheet and compare the detail on you design
 

samuel

Full Member level 3
Joined
Nov 15, 2004
Messages
171
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,296
Location
world
Activity points
1,141
to nathan,

hello,

i have just looked at the your attached file,but i dont find the shematic of OPA.

thx.

sm.
 

cliffj

Member level 3
Joined
Mar 22, 2004
Messages
55
Helped
4
Reputation
8
Reaction score
3
Trophy points
1,288
Activity points
533
Check Philips Allen's book , you can find those techniques. No matter
in simulation or measurement.
 

nathan

Newbie level 1
Joined
May 17, 2001
Messages
0
Helped
5
Reputation
10
Reaction score
3
Trophy points
1,282
Activity points
641
samuel, the described approach applies to all fully differential OPA, they use the generic OPA symbol in the presentation. You can substitute your schematic to the symbol one or create the symbol view from your schematic (clearly you need to have Cadence installed somewhere :) )

nathan
 

samuel

Full Member level 3
Joined
Nov 15, 2004
Messages
171
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,296
Location
world
Activity points
1,141
nathan,

hello, what is cmref in your attached file?


thx.

sm.
 

Alles Gute

Full Member level 2
Joined
Dec 4, 2003
Messages
135
Helped
15
Reputation
30
Reaction score
10
Trophy points
1,298
Activity points
1,217
Philips Allen's book is a good reference for you. I learned how to simulate opamp from this book
 

samuel

Full Member level 3
Joined
Nov 15, 2004
Messages
171
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,296
Location
world
Activity points
1,141
thx.

where to find it? philips Allen's book.

sm.
 

mtkee2003

Full Member level 2
Joined
Sep 24, 2005
Messages
132
Helped
4
Reputation
10
Reaction score
1
Trophy points
1,298
Activity points
2,356
hello
you can read "OP Amps For Every One" By 'Ron Mancini' from Texas Intrument.

and if you don't have this book you can find it at internet easily.

i think that i had downloaded this file from:

**broken link removed**

regards;
Mostafa;
from Iran
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top