Wednesday, 18 December 2019

operational amplifier - Questions on Multi-stage transistor Op-Amp



I would like to know how to understand/analyse the circuit below. And sorry but my level in electronics is not that high and I could only tell that the opposing transistors on the left are meant to cancel any current from the input , yet I don't really understand the B stage which I think the C stage is well related to , and if I wanted to analyse the nodes around the circuit apart from (A,B,C) How can I do it ?


Is it by measuring the current on resistors/nodes?


and note that the output voltage of the circuit in node C is zero this is what it meant to be.I would appreciate any help.


Regards


figure


figure http://postimg.org/image/4022rfie9/





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