Thanks N.

Well, the audio amp chips might be cheaper than some chips that are
less powerful. I know this happens sometimes.

Also, the manufacturer attempts to get a somewhat circular (3D) power
distribution so the orientation of the transmitter is non critical
(and is a circle). So, three transmit stages might be necessary-I
notice each stage has slightly different voltage gain, no doubt to try
and achieve a circular coverage pattern. So, three stages might
actually be necessary.

But, ASIC's are very expensive to develop and this one doesn't seem to
be doing much. Maybe it's cheaper to have an ASIC than to build a
larger circuit board with discrete components?

GL.

A







On Wed, 06 Apr 2005 03:24:05 GMT, "NSM" wrote:


Albert wrote in message ...

It appears to be grossly over-engineered as well, an ASIC feeds one
each amplifier separately and the amps appear to run at very low
power. No doubt a much cheaper transmitter could be made, this one is
also physically large as well!

Far more things than you can imagine are designed like this. On short runs
it isn't cost effective to come up with an efficient design. Same applies to
a lot of software!