avlsi
Community Member
![* *](https://designers-guide.org/forum/Templates/Forum/default/stargold.gif) ![* *](https://designers-guide.org/forum/Templates/Forum/default/stargold.gif)
Offline
Posts: 91
singapore
|
Hi all,
This seems to be funny. But I have a reason, all these days I was getting specs and was designing opamps. They were enough to know my W/L.
Now, I am facing a problem of generating specs and designing.
Let me tell u in detail. I need to design an opamp with the follwoing specs in 0.18 um technology
Open Loop Gain 90 dB Phase Margin 60 degrees - I assumed ( no specs) Unity Gain Frequency 1 M Hz - I assumed ( no specs) ICMR 0.8-1.6 OCMR 0.15-1.65 VDD =1.8 Cload = 25 p F RLoad = 1 Mega Ohm
The biggest problem, I am operating my system @ DC. So, I am not bothered about AC behaviour settling time. Slew rate is also not that important
I donot know how to decide the currents. I am designing a two stage miller opamp.
Please help me on this.
Thanks in advance.
|