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I know about time step control and its deviousness...! I think minimum time step size puts an u necessary computational burden when little or no activity is present.. it is better to have variable

Andy, Assuming your PIC puts out a PWM signal, the simplest way to do this is to use 4 voltage controlled switches (SW). The front ends of the switches can be configured to switch on and off as

Hello Rick and All, Well, it seems to be operating properly now, in that the "Skip" file shows up, though the .savebias command is still commented out in the log file. I spent several hours yesterday

I am in the process of designing a motor controller circuit. A PIC microcontroller will create/control a PWM signal which will be "inputted" to an H-bridge controller which will drive a brushed DC

Thanks.. Much obliged. Cheers A. Ganesan

You may want to look at Intersil's AN1556. See: <http://www.intersil.com/data/an/an1556.pdf> The author makes this claim about his method "Finally, Accurate SPICE Models I can Understand and Modify to

amhtech, I don't know what you mean by "PWM input bidirectional h-bridge driver model.", but most drivers sink and source current. The power switches normally have reverse diodes, so, in effct they

In the US these days it is chocolate cigars!!!!lol

Hello All, Wondering if anyone has a PWM input bidirectional h-bridge driver model for LTspice?

How on earth do you expect anyone to help you? You have not provided any files or a netlist to work with. By the way, your message says it is a warning, not an error - there is a difference. A warning

When I try to run AD8336-2.asc in FILES&#92;AD8336 I get an error message that contains "Circuit: * C:&#92;Program Files&#92;LTC&#92;AD models&#92;AD8336&#92;AD8336-2.asc WARNING: Node U1:U4_N24227 is

Hi George, Laplace transform for ramp in increasing values is (1/s). Yuo search we for this. Since we have decreasing function hence inverse of previous case, you get (s). since s is complex no. with

Thanks Nice idea... This will work for transient analysis too, if LIST is supported in .tran.... Is list supported in .TRAN ?? This would allow you to have lot of data points during fast edges and few

Except in the case of really cool circuits...? :-)

Hello AG, No problem, I don't smoke. Helmut

Thanks. Interesting idea.. But it essentially wants me to double up my circuit on the schematic in order to get V(outref) ( the real circuit is not the voltage divider).. Further, V(Tol) has to be

<snip> </snip> Hello Ganesan, I just thought of another, more direct way for you to do exactly what you want without messing with raw files. You need to use the .ac list... syntax; but why not put

You had a floating resistor Routn1.. I connected it to outn and simulated.. I get the following skip file * .SAVEBIAS from circuit: * C:&#92;Documents and Settings&#92;ganesan&#92;My