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Check the datasheet for the OPA 2846: Vn=1.2nV/sqrtHz, In=2.8pA/sqrtHz that means the OSI (optimum source impedance) is 428 ohms. The 100k resistors in the non-inverting inputs alone introduce 88uV

DON'T upload stuff anywhere but to the list web site. You can upload any sort of file to Files => Temp but big graphics files can go to Files => Big Files. With best wishes DESIGN IT IN! OOO – Own

Let me say why am looking for new design.. We are currently using the receiver module which has three stages: 1. Trans Impedance stage 2. High Pass filter (HPF) stage 3. Unity gain amplifier (just for

"I read that sentence is concluded there was a missing "n": as in either -> neither (or possibly have -> haven't)." Hmmm. Good point. This forum is especially vulnerable to that because people here

Andy wrote: "Hassan wrote: "I have found either the .lib file or the symbol !!! " That is good." I read that sentence is concluded there was a missing "n": as in either -> neither (or possibly have ->

Frank Mead wrote: "The 2n918, 2n5179, and the 2n2857 are still alive and well in Mouser database... they are still used..." Indeed they are listed. But did you check the prices and availability? At

Matt, I just looked at it, and it looks as if SOME of the LT1171's switching pulses are synchronized with the Vc input pin. Those ones have a narrower pulsewidth than the ones around them. Maybe it

Hello Matt, The sync-feature is only implemented in a very few SPICE models as far as I know, Best regards, Helmut

On many of the LT switch mode controllers, the sync function is not implemented in the spice model. Don’t know about that specific one. Jim ' James Wagner Oregon Research Electronics

Helmut uploaded "CircuitAD631_1.zip" earlier, but I don't see a message from him yet. Maybe it is stuck in Yahoo-jail, like other messages are today. His upload says that he added SPICE Directives to

Jeff (kinarfi) uploaded a file "4 GROUP.zip" to the group's Temp folder, but there is no message yet to the group about it. I don't know if you forgot to send one, or if it is just held up by today's

Yes this is a Windows thing, the 'not responding' is displayed in the window title bar after the application name. It usually means Windows is busy doing something else. So program is hung up.

(Another reply that vanished into the Internet): Hassan wrote: "I have found either the .lib file or the symbol !!! " That is good. The first thing to understand is that they are almost completely

Wow, emails to [LTspice] are not making it again! Here is a message I sent several hours ago that hasn't shown up yet: --- "rmoreno.phone" asked how to enter a table of measured values for her/his

The 2n918, 2n5179, and the 2n2857 are still alive and well in Mouser database... they are still used... LTspice@...> wrote:

Helmut, I know you said "All the Darlington transistors in my examples correctly plot power" But that's not my issue. I can see the plot/s but I was thinking I would see "dissipation" in watts as with

There is a standard multi-vibrator circuit that uses the industry workhorse driver the 2N2222 NPN BJT* and I believe it is listed in the examples files (educational) as "astable.asc". That is a good

Jim wrote: "Try a 2N918. Small signal, but I think it is in the built-in LTspice library." Sadly, this isn't in the standard.bjt file, and it would be long-obsolete anyway, along with the very similar

Hello Tob, Please watch the SPICE-directives in my uploaded file CircuitAD630_1.zip. It contains a few SPICE-directives to achieve convergence. I also removed the absolute paths of the model files in

Hello Tob, I tested with the latest LTspiceXVII which has been released today. Please ad the following SPICE-directives. .options method=gear .options gmin=1e-10 abstol=1e-10 .options cshunt=1e-16