Widlar [RIP] has a vibrant CV on the web. He is credited for uA709 while at Fairchild.
.... though ....... who knows what would happen , if one include tiny Aleph CCS per side , driven with some funny polarity and amplitude
The rabbit hole is never ending.
"...here is no need for CCS to be modulated..."
That's not quite the point. I make it more precisely:
1. Because the Aleph current source is modulated it can deliver (when set to the typical gain) double current before it clips. So we get clipping at the the same level with an Aleph current source at say 1A bias as with double sized constant current source i.e. 2A in this example. Hence we can make the amplifier smaller or have the double peak output current. I like that.
2. The Aleph current source helps reducing distortions in an amplifier: It virtually reduces the load that the rest of the amplifier sees. That is very cool. A constant current source cannot do that.
That's not quite the point. I make it more precisely:
1. Because the Aleph current source is modulated it can deliver (when set to the typical gain) double current before it clips. So we get clipping at the the same level with an Aleph current source at say 1A bias as with double sized constant current source i.e. 2A in this example. Hence we can make the amplifier smaller or have the double peak output current. I like that.
2. The Aleph current source helps reducing distortions in an amplifier: It virtually reduces the load that the rest of the amplifier sees. That is very cool. A constant current source cannot do that.
Thanks for your reply. I fully agree with your recommendation [and pr's]. I normally skip these key steps of math/sim and go directly from schematic to a rudimentary prototype just to satisfy my curiosity or prove its concept by subjective assessment.
A schematic is a concept which I write from knowledge I learned [primarily] in this thread. Credit goes to the thread's contributors when it is shown to be good/valuable, and blame [if any] rests with me when it is useless. I am glad that you and others are prudent/skeptical, and hopefully view it with a grain of salt [watch that Sodium]. Best to consider it bad/useless until shown otherwise. Fortunately, schematics will keep coming!
I should have drawn the schematics in a conventional manner; which was not the case due to my practice of cut, paste and copy etc.. My apology for this confusing approach; which I hope to remedy.
Best regards.
I will try to save some money and buy a XA.8…….!
I will report in three years…. 🙂
Why give up so easily and miss all of the fun? 😀
as a former teacher i am used to work 45 min on a problem….
then I need other people around me, a break and a coffee….
🙂
🙂
then I need other people around me, a break and a coffee….
🙂
🙂
I enjoy politics. Physics was a difficult subject because of its [complex] math content, and youth distractions.
I will try to save some money and buy a XA.8…….!
I will report in three years…. 🙂
In 3 years, it will be XA.16 and you will need to save for another 3 years...😀
Generg is one busy Bee ; I'm lazy** , he's exact opposite
so , do not trust him for giving up
though , he's absolutely capable to buy Papamp strictly as Kudos
** OK , more schizophrenic , like sole Bee , too many flowers
so , do not trust him for giving up
though , he's absolutely capable to buy Papamp strictly as Kudos
** OK , more schizophrenic , like sole Bee , too many flowers
I guess, my question in post #263 was overlooked. I think it is an intersting aspect worth a little discussion. So I ask again:
Why no Aleph current source in the XA.8?
Why no Aleph current source in the XA.8?
Hello pr. Its patent is US 5,710,522 which was granted on Jan. 20,1998. Add 20 years to its filing date of Jul. 15, 1996 to declare it is the sole property/practice of Nelson S. Pass till ~the break of dawn of Jul. 16, 2016.
I'll study this patent to understand its knowledge, and its possible adaptability for the sake of my curiosity.
Best regards.
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