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I think the "won't start" problem that RL refers to (without actually saying it), is that the output DC voltage does not come up.? The simulation runs, but the output voltage stays low (<1mV). Roy,

I replaced the missing Mosfet with another NMOS part.? The circuit starts up fine for me.

RL, Please make sure to upload complete schematics including custom symbols.? Yours is missing a special custom symbol for the 2N7002.? (Why, I don't know.) Andy

A filter circuit simulation was offered in ABSE, uploaded as 45216607d4_puzzle.zip If an output transient load section, or a component C4 is connected, the circuit won't start. Gives miraculous ac

I know this is an LTspice group, but I can't help thinking that for purely digital designs, you might be better off using a tool intended for such, like Logisim for example. -- Regards, Tony

If you have a number of identical blocks of gates, there are two ways of defining one and automagically creating from it as many as you want, without drawing them all.

Victor wrote: " But what if you need model 20000 gates? Draw schematic in LTSpice? " Is this still a question about reversible logic?? (If it isn't, please start a new Topic.) LTspice can simulate

Hi Vlad I know about possibility for logic modelling in LTSpice... But what if you need model 20000 gates? Draw schematic in LTSpice? -- Best Regards Victor

Hello LV The gates have a truth table that can be easily implemented in LTspice with A devices or .MACH. The only things to take care of are the transition times, since LTspice is a SPICE and, thus,

Hello You need study HDL (VHDL or Verilog) and use appropriate tools like Modelsim or Active HDL -- Best Regards Victor

A web search indicates that reversible gates can be made from logic that has 3 inputs and 3 outputs. These can be built in LTspice, using the special A-devices or perhaps even with real parts. But

Aditya wrote, "I wanted to know if it is possible to implement reversible logic gates like "Toffoli" and "Feynman" in LTSpice." LTspice (note the spelling, the 's' is not capitalized) is an electronic

I am new to reversible computing and reversible logic in general. I wanted to know if it is possible to implement reversible logic gates like "Toffoli" and "Feynman" in LTSpice. Any help would be

The ADHV4702 is a small signal op amp with operation to 220V and 10MHz GBW. Add an HV current buffer, schematic same as LH0002 and you are set. You'll have to chase down some HV NON and PNP devices as

Will do. Just thought I'd check to see if it's a known bug before assembling the stuff.

dcorner1953 wrote, "LT refuses to bring up the current meter or thermometer icons for just two components in the entire circuit" Just to be clear, transistors have 3+ terminals, so the currents you're

We can't help much unless you let us see more of what you are doing. Upload your .ASC file AND all the other files required to run the simulation, but not .RAW? and .LOG files,? in a ZIP archive to

Update: I've f6 copied the entire schematic into a new blank document. This copy shows current and temp for one of the two affected transistors. Tried copying the copy into yet another blank document,

I meant to add, I've completely isolated the quadrant from the rest of the circuit and tested it on its own load. It is identical to the upper right quadrant, which has no problem.

I'm designing an H bridge driver in LTSpice 17.0.19.0. The bridge is working very well, but LT refuses to bring up the current meter or thermometer icons for just two components in the entire circuit,