I just rechecked my stocks. Where did all those tanhs come from?
NT
I just rechecked my stocks. Where did all those tanhs come from?
NT
Tunnel diode.
-- John Larkin Highland Technology, Inc lunatic fringe electronics
Is there a Spice tunnel diode device?
Cheers
Phil "owner of a bag of 1mA TDs that are too slow to be useful" Hobbs
That must be hard to sign on checks.
-- John Larkin Highland Technology, Inc lunatic fringe electronics
Yup, the basis for my very first patent...
3,491,301 Integrated Harmonic Mixer ...Jim Thompson-- | James E.Thompson | mens | | Analog Innovations | et |
Not native. However, bordodynov has uploaded models to Yahoo LTspice.
See
Download zip file:
TUNNEL_Diode.zip 4KB New models and test bordodynov May 23
D1 is a schottky 1N4007 - does that confuse things??
piglet
TANH implies a differential pair? So isn't there feedback action at the common emitter junction?
piglet
1N4007 is NOT a Schottky. ...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et |
Oh, ye, who only think in devices... TANH is a mathematical expression ;-) ...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et |
thout the
y the output graph. What sort of circuit is it?
To piglet, I think they pull tanh out of the ideal diode equation.
(e^x-e^-x)/(e^x+e^-x)... but I don't recall how.
George h.
Only for shallow thinkers >:-} ...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et |
George, Your equation _is_ the definition of TANH.
...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et |
Thought I had scrawled that out before, found it...
...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et |
At T0, what direction is the flux?
Now there's a question lacking the necessary details. Alternate reply: in some unknown random core with unknown history, it's in that direction ->
NT
Think about it. At zero it's zero... not a problem. ...Jim Thompson
-- | James E.Thompson | mens | | Analog Innovations | et |
I was always told transformer cores can have residual magnetism. ICBW though, magnetics is not my thing. I'm more into efficiency.
NT
At zero, we'd LIKE it to be zero. Remanent field in big iron promotes saturation and is behind a lot of light dimming events. A fluorescent tube can accidentally rectify well enough to saturate a ballast- then hot tar comes dripping from the fixture if the fuse doesn't go first....
You're talking about a bistable multivibrator. The subject at hand is a Schmidt trigger. Knowing the input conditions of a Schmidt trigger one knows it's state. That's not true of a widget that requires a storage element.
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