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.

design single-ended opamp

Status
Not open for further replies.

electim2004

Member level 1
Joined
Apr 17, 2005
Messages
32
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
1,493
please guide me to design opamp:
single-ended opamp

Adc>80db

Fu>=160Mhz

PM>=70deg

output voltage swing>=1.8vp-p

Vdd=2.5V

Pdiss<=5mw

L=.25U

WHAT IS PROJECT PLAN?
w1,...=?
Cc=?
please guide me.
 

nxing

Advanced Member level 1
Joined
May 10, 2004
Messages
422
Helped
25
Reputation
50
Reaction score
10
Trophy points
1,298
Location
China
Activity points
2,856
there is a design procedure from P. Allen's book, try to find and follow it. It's not difficult
 

sunking

Advanced Member level 3
Joined
May 25, 2004
Messages
874
Helped
70
Reputation
140
Reaction score
23
Trophy points
1,298
Activity points
6,283
use gain boosting structre
 

avinash

Full Member level 3
Joined
Jul 24, 2004
Messages
160
Helped
10
Reputation
20
Reaction score
3
Trophy points
1,298
Activity points
1,527
i am doubtful whether simple two stage class-A opamp can provide 160MHz UGB.please clear me if i am wrong.i thing we have to choose the folded cascode opamp for 160MHz ugb.
 

J

jiangwp

Guest
I think it may be the single stage fold-cascode amplifer with the gain-boost technique.
For the .25 mico technology, the bandwidth of two stage amplifier may be attained if offset is not dominant parameter with all minimum length design.
 

SkyHigh

Advanced Member level 1
Joined
Jan 13, 2005
Messages
432
Helped
79
Reputation
158
Reaction score
27
Trophy points
1,308
Activity points
7,319
Use an OTA or so-called 2-stage CMOS Op-amp. The internal feedback is the key to push the linear bandwidth to 160 MHz, by means of gain boost in the gain stage.
 

wjx197733

Member level 2
Joined
Sep 21, 2004
Messages
53
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
476
you can refer to Allen's book
 

kobeii

Newbie level 4
Joined
May 13, 2005
Messages
6
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,319
i think 160MHz is accessable in 0.25 tech

hehe
 

surajit

Junior Member level 2
Joined
Aug 11, 2005
Messages
23
Helped
3
Reputation
6
Reaction score
1
Trophy points
1,283
Activity points
1,440
i have doubt about D.C gain of 80 dB, other things are achievable.u can use folded cascode opamp for ur design. see allen-holberg.
thanks.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top