Figuring out why an actual circuit is not working like the simulated circuit

[eetech00]

Hey, thanks for all that.  I am certainly learning something here.  I have a bunch of questions though. 

1.  You reverted the resistor values back to Hans' values.  I was using standard values so I can actually get a chip resistor with that value.  I will resimulate with your values, but do you think it matters much?

I changed the values back to the original just to check that the circuit actually worked as drawn in the book.
One error was RBM6 (R14 on your schematic) it is shown as 17 ohms, should be 17k.

2.  Adding those output nets TRIANGLE, SQUARE, and R was just for convenience, right?  That doesn't seem to affect anything.  What is the need for the R "output"?

Yes...for convenience. No...Don't know what "R" is for.

3.  Why did you move the voltage source from the right to the left?  Any reason?

Just did....ignore it.

Most importantly:

4. How do you specify a transistor model to use for your transistor?  When I right-click on any transistors all I can do is "Pick New Transistor" and then use the list of commercial choices.  I see no way to pick "NP" or "PN" and I don't understand how you specified "NP .1" or "PN .1" or why those names instead of just "NP" or "PN".   Knowing this would be extremely helpful, I can't figure it out.

I actually used a text editor to edit the .asc file. But if you rht-clk on the transistor model text, a dialog will pop up and allow you to change it, then just type: "NP .1", w/o quotes. Doing so specifies "NP" as the model and ".1" is the size (area) of the device. default = 1. The size is a multiplier and increases or reduces all params for the device. For example 'NP 2" is the same as placing two transistors in parallel. The book your using is meant for IC designs, so keep that it mind when analyzing the circuits. IC's don't use transistors like you buy of the shelf and many of the adjustments are made by varying the size of the BJT.

5. What transistors could I possibly use that have a close match to the simulation values you used for NP and PN?  What might be a good choice?

Thank you for all your help so far.

I'll leave that for you to research..

[JoeN]

I changed the values back to the original just to check that the circuit actually worked as drawn in the book.
One error was RBM6 (R14 on your schematic) it is shown as 17 ohms, should be 17k.

In the original post (see top of this post) I linked in Hans' schematic from his online book and that schematic has that resistor listed as 13K.  I changed it to 12K to make it a standard value.  I didn't use the value in the printed book or show the printed book's schematic.   It's R14 in my schematic because it is R14 in Hans' schematic from the online corrected edition.

I actually used a text editor to edit the .asc file. But if you rht-clk on the transistor model text, a dialog will pop up and allow you to change it, then just type: "NP .1", w/o quotes. Doing so specifies "NP" as the model and ".1" is the size (area) of the device. default = 1. The size is a multiplier and increases or reduces all params for the device. For example 'NP 2" is the same as placing two transistors in parallel. The book your using is meant for IC designs, so keep that it mind when analyzing the circuits. IC's don't use transistors like you buy of the shelf and many of the adjustments are made by varying the size of the BJT.

That is what I figured but that box is read only on my machine.  Maybe I will be editing the ASC file myself.  I wonder why it is locked down.  Maybe there is a parameter that needs to be set somewhere.

I'll leave that for you to research..

OK, thanks.  I am just concerned there will be none to find.  I would think that modern transistor designs are done to maximize gain.

Thanks for everything.  I will see what I can do with this.