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Strange high frequency push pull transformer action

S

Spehro Pefhany

Jan 1, 1970
0
That's a complementary pair... separate chips on hybrid substrate. I
used that very device to solve a touch screen power supply issue for
someone up near you where it BLIZZARDS ;-)

...Jim Thompson

A oui bit of snow might be nice for a change- it's getting a bit
dreary with the short days and November rain.


Best regards,
Spehro Pefhany
 
J

josephkk

Jan 1, 1970
0
Betcha he finds this:

.------------->
| .--->
| |
'-'-'-'-'-'
=============
(A) .-.-.-.-.-.-. (B)
| | |
+5v-' ||--' '--||
||<-. .->|| Q2
__||--+ Q1 +--||__
| |
=== ===

That would explain the first waveforms, anyhow.

Could be, you would get the same basic appearance in both drains but the
voltage magnitudes would be different.

?-)
 
J

josephkk

Jan 1, 1970
0
Still poking around. You guys thoughts and responses are great and
confirming that I'm not crazy. :)

The transformer guy is saying it is some fancy RF stuff and I don't have
the background to say he's wrong but my gut says its something 1st order
that is the problem.

Somebody needs to tell him 10 MHz hasn't been fancy RF stuff for 75 years.

?-)
 
L

legg

Jan 1, 1970
0
Huh? It's trivial. I designed a LiIon battery charger chip based on
that very scheme.
Doesn't it mean isolating drains from substrate?

RL
 
J

josephkk

Jan 1, 1970
0
A oui bit of snow might be nice for a change- it's getting a bit
dreary with the short days and November rain.


Best regards,
Spehro Pefhany


Arrgh, 'tis an inter lingual pun.

?-)
 
S

Spehro Pefhany

Jan 1, 1970
0
Arrgh, 'tis an inter lingual pun.

?-)

How many eggs does it take to make an omlette?

One is an oeuf...


Best regards,
Spehro Pefhany
 
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