Continue to Site

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.

Microp-Cap problem...please help!

Status
Not open for further replies.

gvanto

Member level 1
Member level 1
Joined
Aug 17, 2004
Messages
41
Helped
4
Reputation
8
Reaction score
0
Trophy points
1,286
Activity points
442
Im having a problem with something very simple (in Micro-Cap 7)

I have a simple circuit (op-amp feedback circuit).
It has input VIN1 and output node VOUT1, and simulates just fine.

When I then copy this EXACT circuit (highlight it, hold CTRL and drag away copies it), the nodes are automatically renamed (ie. VIN1 becomes VIN2, R1 is R2, etc) which is as expected.

But when I simulate the new circuit, totally different results come out!! This mind-boggles me :?:

Any help much appreciated,
gvanto
 

Your description of problem is insufficient. One of the possibilities for different results is if your opamp has auto added supply voltages, they are also renamed when you make a copy of circuit but they do not exists. You must add two new voltage sources VC1 and VE1 or change VC1 to VC and VE1 to VE.
 

    gvanto

    Points: 2
    Helpful Answer Positive Rating
Thanks Borber that was the problem precisely! (Schoolboy error by me:))

best regards,
gvanto
 

hi boys,

a question about microcap7.
i just want to plot the data
i used SDT(v(1)) integration on existing data
the result graph has right amp. & frequency
but it has ofset. How to remove this ofset?

The root function is v(1) =A.sin(kt),
SDT(v(1)) must gave - A/k.cos(kt)

but from SDT I get - A/k.cos(kt) + A and this is wrong .

who know? please tell me ..

regards Keen
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top