If the natsemi parts are on special or tweaked processes then I can understand that the cost of transferring the process vs sales is a factor in killing them off.
Are the 4562/49710 etc being spared/transferred?
Or go completely discrete: http://www.diyaudio.com/forums/soli...k3-cfa-pre-phone-amp-very-low-distortion.html
"Transistor linearity" is, the extent to which the proportion between input and output amplitude (for the transistor acting as amplifying device) is the same for high amplitude and low amplitude input... according to Wikipedia. Now you owe me the answer to the question: 😉
which is a question related to an effort (3 schemes as examples) to improve LM4562 stability in a low (signal) gain circuit.
No idea, never use it. Some transistors designed for CRT video drive with very low Cob are preferable for VAS, but I don't see how this one can be used.
Philips sold on the Dutch market a clever box with components, and a board on which spring loaded connecting nodes could be placed. It also had some schematics with radio's and other stuff that could be built with it. My dad bought it for me when I was still in elementary school, after he had explained to me how a triode amplifier works, and I apparently had understood what he was saying. Many funky things could be built with it à l'improviste, and all this contributed to the fact that I never formally studied EE.
It was sold here, too- I got it for my 10th birthday. Once I had built most of the project circuits, I started experimenting and learned quickly about components and smoke. I can still remember the transistors- AF116 and AC126.
Yeah, around the same age Stuart. Traumatic memories of leads breaking off transistors, two weeks of pocket money gone.
I think you might have the LME49990 confused with LME49600. The 49990 is a bipolar op-amp similar to OPA1611, whereas the 49600 is the buffer.
Maybe you can get someone to let Jack in the fab and put QP's on the diffusion furnaces. Since we never made buffers like that I'm not sure what you are referring to.
You guys had it too easy with your fancy premade kits.
School mates and I went dumpster diving at the local telephone exchange...all sorts of goodies.
The local TV/Radio repair shop was 5 doors from home, same deal I had free reign to dive into their dumpster also....really cool goodies for a 12 yo to strip and repurpose all manner of parts.
I even made my own pcb's, and built an amp using TH parts using surface mount layout.....long before ever hearing of SMT/SMD.
Dan.
School mates and I went dumpster diving at the local telephone exchange...all sorts of goodies.
The local TV/Radio repair shop was 5 doors from home, same deal I had free reign to dive into their dumpster also....really cool goodies for a 12 yo to strip and repurpose all manner of parts.
I even made my own pcb's, and built an amp using TH parts using surface mount layout.....long before ever hearing of SMT/SMD.
Dan.
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I couldn't dumpster dive until attending university, then it was hog heaven. Also made pcbs in my apt sink,
but soon wised up and found a nice small company in NC (Atlas Circuits) who made photo pcbs, big improvement.
I just ordered a used copy of Thomas M Frederiksen's (RIP) 'Intuitive IC Opamps' from Amazon which arrived today - I used to have this years ago but lost it in one of my many moves. If you don't work with opamps professionally, this is a very good introductory text to these devices with a discussion on the inner workings of opamps, lots of worked applications circuits covering filters, oscillators, a good section on feedback and compensation etc.
This book is still in demand 30 years after it was first published in 1984. I paid $6-00 for my copy - shipping about $15 on top of that. There's still a few around - highly recommended.
This book is still in demand 30 years after it was first published in 1984. I paid $6-00 for my copy - shipping about $15 on top of that. There's still a few around - highly recommended.
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