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more video conversions [message #283063]

Mon, 17 March 1986 20:31

jhs
Messages: 26
Registered: May 2013

Karma:

Junior Member

<pre>
Article-I.D.: mitre-be.8603172338.AA14276
Posted: Mon Mar 17 20:31:47 1986
Date-Received: Wed, 19-Mar-86 01:00:18 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The MITRE Corp., Bedford, MA
Lines: 23

Browsing thru the 1980 National Semiconductor catalog, I find some other cute
chips.

The LM1886 is a Video Matrix D-to-A Converter. This chip takes 3-bit inputs
for Red, Green and Blue and produces luminance and color-difference outputs.
The gadget can produce either NTSC ("Never Twice the Same Color") or PAL
(European standard) outputs.

These analog outputs can be very easily turned into true RGB or Composite
output, although you will need additional circuitry to come up with the sync
pulses.

The LM1889 chip takes audio, color-difference and luminance signals and
produces RF for your TV set antenna input terminals. (Or you can buy a whole
TV modulator if you are lazy.)

Anybody interested in doing these kinds of things clearly should call up your
nearest National rep and wheedle a Linear Data Book out of him. They are made
to be given away if you ask nicely.

-John Sangster
jhs @ mitre-bedford.arpa
<...!ihnp4>!linus!mbunix!jhs
</pre>

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