In class we are designing a few different circuits and it uses some diodes and opamps. Everything is fine on paper and everything makes sense. These are only ever refereed to as a "diode" or "opamp".
So then I made a simulation on pspice. However depending on what diode or opamp I choose the results I got were completely different. There where many opamps and diodes to choose from in the component list.
Until now I just thought a diode is a diode or opamp is an opamp as there's never been any more specifics on them. Nothing like a resistor or capacitor where you have to choose the correct value component to get it all to work.
So I was wondering when people say "use an opamp" is there a standard common / specific opamp that is the general one used.
Same with the diodes. Is there a standard go to diode that is used in all circumstances ..unless otherwise stated.
After thinking about it..what about transistors also?
Best Answer
Here are the types I immediately think of when someone says "diode", "op-amp", ...
These are extremely common, basic parts. If you walked into a hobby store and asked for a hundred transistors, without specifying anything else, you would probably get a bag of 2N2222's.
This is not to say these parts are useful for everything - they have limitations on voltage, current, speed, accuracy, and so forth. But if you have to pick a type of component for the purposes of a SPICE simulation, these will work fine.
Edit: For reference, here are the "default parts" you get in CircuitLab:
TL0811N41481N4733A2N39042N3906IRF530IRF9530J310J271