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Sorry for the late response - catching up after return from vacation. I've successfully simulated numerous p-p valve (tube) amp circuits using the simple model posted by the OP, albeit with higher

The UniversalOpamp2 has a reasonable method of output limiting already builtin. The parameter "rail", which is set to 0, by default, is the "closeness" the output is able to approach the rail. If you

In message <lm47ov+1h0laj6@...>, dated Wed, 28 May 2014, "sineysitch@... [LTspice]" <LTspice@...> writes: Diode limiting is quite 'soft'. If you want hard limiting, a

The internal representation of the level.2 op-amp ("UniversalOpamps2.sub" ?) does not seem to use actual transistors, presumably for speed of simulation and to make it more generic. What external

oops.. Sorry, I meant the "Equivalent Schematic Diagram", Figure 51. on the datasheet, not figure 2. HT

Hi Andy, "I am not so sure about that. Doing that would make the resistor between pins 11 and 12 unnecessary because it would be shorted out. I think they meant pin 12 to not be grounded in the Tach

Mike, Helmut is exactly right, but it is really energy that is transferred between the inductor and capacitor. The inductor current becomes charge on the capacitor and the charge on the capacitor

Hello Mike, Initial current in an inductor has the same meaning as initial voltage in a capacitor. You can think of it as a "charged" inductor like applied voltage to a capacitor which is a charged

Andy, I can't figure out how to quote your text with right brackets to separate it from my reply. Thank you very much for the detailed reply. One thing I didn't think of was to pick up the part and

Hello Patrick, Your subcircuit was wrong. The correct syntax for your subcircuit should be as shown below. Compare every line to see what I have changed. *Pinbelegung *Pin 1: Input *Pin 2: Output *Pin

OK, thanks Helmut, Now I can get it to work at least, but it still seems awkward to use: I have to 1) Un-tick "Sync Horiz. axis". 2) Set Manual Limits 3) Re-tick "Sync Horiz. axis" (So, not what I'd

Patrick asked: "1) When I want to simulate the circuit I get the error "Analysis failed matrix is singular" ? ? Where does it come from and how can I prevent it except the option to switch a

Hallo all together, I want to make an AC - simulation of a Boost Converter by its Laplace transfer function. For that I have designed a subcircuit Boost.sub , a symbol Boost.asy and a circuit

In message <lm20sr+1jfqvok@...>, dated Tue, 27 May 2014, "basier.philippe@... [LTspice]" <LTspice@...> writes: But did you submit your 'wish list' for something

Hello all of you As I live in Paris I phoned to "Lycée Richelieu". It's a Yahoo or i-phone problem. I think i-phone. Not fishing or attack problem. So: there will be no more rubbish mail. Regards PhB

The end with the "dot" does make a difference. If you rotated or mirrored an inductor on the LTspice schematic so that the "dot" swapped locations with respect to the rest of the circuit, that would

hitec92407 wrote: "I was able to get the macro model working." Excellent. "... There actually is a ground input on the schematic." "Its Pin 12 shown in the BIAS section. All ground points on the

Mike wrote: "IC=-100.8u "I understand this is to establish an initial current. But how do we know which circuit it applies to, and how do we tell it is intended to set the current in L1?" We know it's

Dear Helmut, I thiink you uploaded this file so I'm sending the question to you. In crystal.asc, located at

Friends I dont know who is sender of above message ( thats caused misunderstanding) , but i am wondered how it addede to my querry. Sorry from my side for inconvinience. But i am not responsible for