What was with, "Picky, picky. To my mind, the base current robbed by the collector starves the base, lowering the CE stage's gain, until the exact equilibrium is achieved"? Where in the world did that come from... Larkin's _incorrect_ description?
I'm prepping for a trip to SFO.
On Monday I'll award a bottle of fine wine to the first person to properly show how the oscillator actually works... IF there is anyone who can :-( ...Jim Thompson
The microwave people still do a lot of math. And they use E/M simulators, not Spice.
As I noted, the basic development of microwave and radar technology was done before computers existed. WWII radars came within 2:1 of the theoretically possible target:distance detection limits. All with pencils and slide rules.
That
Spice is useless in simulating waveguides. Useful E/M simulators are a pretty recent invention.
Computer modeling has
Done before Spice. Look it up.
Just because you can't do math doesn't mean that others are similarly handicapped.
John
Why would that be amplitude stable?
John
Why would that be amplitude stable?
John
It is usually faster, but these days, not usually better. And the speed gain is only about the operator of the sim package, not the sim. A good sim app user can beat you, hands down, and have reliable numbers to compare with real builds as well.
Sim apps have gotten orders of magnitude tighter in their iterative analysis and inclusion of parasitics, etc.
Far better than you, with or without your bench.
Really ?:-)
This post is only to record Larkin's asinine statement, "...reducing transistor base current hence gain..." for posterity ;-) ...Jim Thompson
Oh, yes, I forgot to emphasize that engineering term, "...almost exactly..." :-) ...Jim Thompson
cc
peak
nd the
-b
urrent
mes
Reducing i(b) makes i(e) fall, r(e) rises, stage gain falls. Seems okay--have I missed something?
James Arthur
Simulation is like breadboarding. Neither is designing.
John
In my oscillator, a c-b schottky diode would keep the transistor c-b junction from conducting, and keep the transistor out of saturation. Tempco would still be low. That simplifies things considerably. Not bad.
I seem to recall the DC base voltage being about +.6. So the collector swings to just about zero, and the AC output is 2*Vcc p-p. Somebody could Spice this, if they were interested, and see exactly what happens. The transformer ratio gets involved some, too.
John
Avis Rent-A-Time-Machine.
John
You're an idiot. Sitting next to my breadboard is my clipboard and calculator, Johnny.
You really do have a problem using tools correctly.
simulation is simulation, Johnny, and that is what you were dissin', boy.
And as I noted, the advanced development was done on computers.
Microwaves are strange things, Johnny. Not too hard to manipulate and observe.
That would depend on how many parameters one incorporates into any 'model' utilized.
Mid '90s
Yes, idiot. conception is a bitch. 'Done' before Spice, but optimized and modeled in the current world WITH it. ALL of the current implementations are computer designs. Sorry, chump.
Just because you ASSume worse then a street cop in a ghetto doesn't make your pig assumptions correct.
Yes, but they would not be as retarded as you claim to be scientists are by rejecting the pinnacle of human science based on Luddite mentalities
You lose... again. Completely predictable.
You use the oven to trigger the controlled oscillator.
That one might slip past a few of the folks here, including its target.
Neither simulation nor breadboarding is a safe substitute for understanding what's going on.
Wow, you are obsessed with that part of the body, and its various products.
John
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