"ian field" wrote in message
...

"Jim Thompson"
/Snicker
wrote in message ...
On Thu, 21 Jan 2010 22:19:29 -0000, "ian field"
wrote:


"Jim Thompson"
/Snicker
wrote in message ...
On Thu, 21 Jan 2010 18:18:21 -0000, "ian field"
wrote:

Is there an appnote for the MC1350?

TIA.


The appnote is AN545A/D, but I can't find it anywhere :-(

A cross reference says the following parts are "similar":

LM703LN, SN76600P, uA757DC/M, MC1490

Good luck!

The data sheet is pretty complete. What info do you need that's
not
on the datasheet?

Thanks, I'll search on those numbers.

Most of the application examples use an inductive load (usually
tuned) I'm
looking for examples with resistive load.


From my vague memories of it... I helped design it (it was a
spin-off
from the 60MHz military radar IF)... you need to be careful with a
DC
load, otherwise you'll saturate the output differential pair.

What exactly are you trying to do that you want a resistive load?

They sometimes turn up 2 at a time on old 5&1/4 HDD logic boards,
there's
already a couple in the parts drawer and I found a couple more on a
HDD
board while clearing out a junk box.

Since I now have so many, I thought maybe I should try to do something
with
them. My first thought was an audio compressor.

FWIF, about the same time I used the MC1350P for an RF SSB compressor an
article was published in one of the ham radio magazines showing how to
build an outboard audio compressor using the MC1350P. In order to get it
to work the author modulated an RF signal and compressed the RF and then
demodulated the RF signal and applied the resulting compressed audio
into the microphone jack. I found it much easier to compress the
transceiver's SSB modulated signal and then making sure the signal was
amplified linearly after it was compressed. The chip was designed for RF
applications in TV IFs, not audio.

--
We have met the enemy and he is us-- Pogo

Anyolmouse