Ahhhh, that's it, jimkirk. I go so focused on the current mirrors that are after this pnp-npn arrangement, that I incorrectly figured they were doing something similar. The opamp can output bipolar signals (and is intended to output a 'drive' signal to turn one or the other of the post circuit...
Comcokid, my apologies for a poor description of the configuration I don't understand. Hopefully, this description will be better...
Take a pnp transistor symbol - draw it with the base facing right and the emitter facing up. Place an npn transistor symbol to the right of the pnp transistor...
Hi Mike. Thanks for the suggestion. I went to National Semiconductor LM3900 and looked over the applications notes, specifically the Application Note AN-72 - which has 46 pages. I scanned the topics and pages for circuits having configurations like the one I am trying to learn something about...
Hello. Just recently found this forum and it certainly looks like you guys have a lot to offer. Hopefully, I can do the same moving forward.
In the meantime, I am looking for some additional information on current mirror circuits. I have spent some time reviewing google links for 'current...
