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Discussion in ‘ General Electronics Chat ‘ started by kevincaJun 10, Jun 10, 1. Jun 5, 30 0. I am beginning to study electric engineering. I am playing datashee circuit simulators, sample circuits, and actual circuit I build with parts I have.

My question is that if in a sample circuit use a op amp or transistor model which I dont have.


How do I look if my model is compatible with sample model? Do I look at data sheet? In simulator with exact model as sample circuit I get correct result. Can anyone please provide a concrete example? Jun 10, 2. Mar 30, 7, 1, Have you studied op amp and transistor parameters? For op amps, things like datasheeet impedance, offset voltage, common mode rejection, gain bandwidth, slew rate, output swing how close it can get to the railsetc are among the important parameters.

For transistors, beta, breakdown voltages, max collector current, max power dissipation, fT, etc are some of the important parameters.


Jun 10, 3. I looked dataasheet the specs for your parts and don’t see why they wouldn’t 2aa1015. Since you’re breadboarding the circuit, have you tried troubleshooting? What voltage is at the non-inverting pin of the op amp? Is it what it should be? What voltage do you expect on the emitter of the transistor? What 2za1015 the base voltage be if the transistor was on?

Jun 10, 4. Thank you for your answer. Therefore V emitter should also be 14V and verified with multimeter. I will test what is fried.

2SA1015 Datasheet

Jun 10, 5. I tested op amp still works. I verified current flowing emitter to be 5. I dont know how to calculate voltage at base.

I reversed and I think circuit works, at 5. But why two different datasheet would say opposite pin assignment? Jun 10, 6.

Aug 1, 7, 2, The two datasheets DO agree. One is a top view and one is a bottom view. To be clear, use this one: Jun 10, 7. The pinouts look the same to me. The first datasheet is showing the bottom view. This sometimes confuses me too and I wish they’d darasheet that it’s bottom view.

If the creator new anything about mechanical drawings, they’d satasheet the “hidden” portions. The second datasheet has no ambiguity. Jun 10, 8. Oct 2, 5, 1, The whole premise of datawheet feedback is to make the circuit behavior insensitive to some variation in parts specs.


That opamp-current-sink circuit has heavy feedback, so the transistor specifics almost do not matter. The Hfe could be almost anything, etc.

Any opamp that has a large open-loop gain would also likely work in that circuit. How do I model stray capacitance of wires in an opamp circuit? Posted by mecrotty in forum: Why 2ss1015 we need A Resistor in this Circuit?

Posted by tallo in forum: Wondering how to datahseet a certain process Posted by ssolitare in forum: How do I determine breakdown voltage of a capacitor?

Posted by dbooksta in forum: How do I determine the size of a new circuit? Posted by golfish in forum: You May Also Like: These Arduino Projects want you to Smell Them!

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