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In message <l82jov+1092dt7@...>, dated Sun, 8 Dec 2013, sawreyrw@... writes: We must be looking at different .asc files. I'm looking at one that just has MCP6292 op-amps and a few Rs

well what i want to do is to evaluate the circuit's gain and phase margins as described in ltspice educational examples Loopgain.asc ,Loopgain2.asc .But with this kind of topology i post,i dont know

John, R1 is a bias resistor to ensure Q2s collector current is sufficient. It also provides a path to discharge Q7s base when the AC voltage swings down. C1 reduces the bandwidth of Q7. Rick

In message <l82hrs+nqehh0@...>, dated Sun, 8 Dec 2013, vegetat55@... writes: What are C1 and R1 for? If you disable this network by making R1 = 1 meg, it seems to work as predicted.

the file i posted is at Files > Temp named Singleton amplifier loop gain simulation(Gain & phase margins).asc

In message <l82gt4+nphhn5@...>, dated Sun, 8 Dec 2013, vegetat55@... writes: Please upload the schematic, not the net list. It's far easier to help with a schematic. -- OOO - Own

Hello. I am trying to simulate the loop gain of this kind of amplifier but i cant. i want to find gain margin and phase margin.can you help? I uploaded LTspice file in temp folder here:

Le 08/12/2013 14:07, Andy a crit : I believe the reason is when a transformer is properly modelled with its stray capacitances, the results will be different in function of the way the floating part

Smart! I have never thought of doing that. I include additional files in some of my subcircuits/lib files, but I still have to .inc my subcircuit. I will try your trick!

Dhara wrote: Therefore I would like to specify two different grounds. Is this actually There's nothing stopping you from having any number of so-called "grounds" (in sloppy electrical circuit

Hello, You have most probably defined too high numbers in the symbol's "Netlist Order". These numbers should be 1,2,3,4,5,6,78 in the order of the .subckt line. I have uploaded two examples

you may right-click on the wire and chose "label", and there you have ground and com ... which is the one you seek.

I created the links, but instead of using a .inc file, put the equivalent path into the custom symbol for the path to the MyLib. Your help is much appreciated, thanks.

In message <l81ap6+19csfea@...>, dated Sun, 8 Dec 2013, the_sky_falcon_1982@... writes: GROUND 101 The problem is actually with the concept of 'ground', which is different in real

Hi all, I would like to know how to specify different ground planes in ltspice. What I would like to do is to simulate a resonant wireless power transfer circuit. The transmitter side is a resonant

Hi, i've tried to import the instrumentation amplifier INA128 spicemodel into LTspice but it did not word. The problem is in the spicemodel the pin are numbered sa below : 1 2 3 4 5 8 9 10. the 6th

True, but that one's transistors' model is more off than this one, and there is no proper symbol that goes with it. I tried that model and I was not happy at all. For the vast majority of my projects

Did you look at LTC6992-x in the special functions library? LTC has an Excel-based design tool for all these timerblock products. Dan I'm new to ltspice, and am trying to draw and simulate a circuit.

Hello There is another example "CD4007_spdt.zip http://tech.groups.yahoo.com/group/LTspice/files/%20Lib/" with the CD4007 in our Files section. http://groups.yahoo.com/neo/groups/LTspice/files/%20Lib/

Hello, The model DC characteristic may be ok, but? model with no capacitances is not reasonable.? You might be better off using LTspice logic devices. Rick