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.

Looking for ideal opamp model file for Cadence

Status
Not open for further replies.

suhas_shiv

Full Member level 2
Joined
Nov 30, 2005
Messages
136
Helped
11
Reputation
22
Reaction score
4
Trophy points
1,298
Activity points
2,461
Hi all,

Does cadence analog library have an ideal opamp that I can use to simulate a circuit? Do I have to attach a model file for it also just like for a MOS transistor? If yes, where can I find a simple model file for it?

Thanks

Suhas
 

safwatonline

Advanced Member level 4
Joined
Nov 19, 2005
Messages
1,346
Helped
219
Reputation
438
Reaction score
48
Trophy points
1,328
Location
EGYPT
Activity points
9,039
Re: Cadence Help

functional library >>opamp.
else try to make ur own by verilog , i made a simple one by verilog a while ago ,it may help.
Code:
module CMFB(inp,inn,out,VDD,GND);
        input inp,inn,VDD,GND;
        output out;
        electrical inp,inn,VDD,GND,out;
        parameter real GAIN=30;
        real x,y;
analog begin
//      @(cross((V(inp)-V(inn)),0))
                x = 0.9 + GAIN*(V(inp) - V(inn));
        if (x > V(VDD)) begin
                y = V(VDD);
        end
        else if( x <V(GND)) begin
                y = V(GND);
        end
        else if ( (x < V(VDD)) && (x>V(GND))) begin
                y = x;
        end
 

suhas_shiv

Full Member level 2
Joined
Nov 30, 2005
Messages
136
Helped
11
Reputation
22
Reaction score
4
Trophy points
1,298
Activity points
2,461
Cadence Help

Hi thanks,

I tried using the one u mentioned(opamp - symbol and opamp-spectre) but I get an error undefined model. So I assume it is looking for a model file associated with this.
 

safwatonline

Advanced Member level 4
Joined
Nov 19, 2005
Messages
1,346
Helped
219
Reputation
438
Reaction score
48
Trophy points
1,328
Location
EGYPT
Activity points
9,039
Cadence Help

yep i tried it now and it gives me a model eror too, sorry try using the model i posted i tried it b4.
 

gevy

Full Member level 6
Joined
Nov 17, 2004
Messages
340
Helped
60
Reputation
120
Reaction score
29
Trophy points
1,308
Location
Russia
Activity points
2,167
Re: Cadence Help

I use vcvs as ideal opamp.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top