design single-ended opamp

[electim2004]

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]

there is a design procedure from P. Allen's book, try to find and follow it. It's not difficult

 

[sunking]

use gain boosting structre

 

[avinash]

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.

 

[jiangwp]

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]

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]

you can refer to Allen's book

 

[kobeii]

i think 160MHz is accessable in 0.25 tech

hehe

 

[surajit]

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.