Re: Desired Sinewave Generator IC

On Mar 10, 7:22 am, "David L. Jones" <altz...@xxxxxxxxx> wrote:
"DH1" <newste...@xxxxxx> wrote in message

news:d46d1a08-e905-4f69-96bd-be9797ad21d1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx







Well yes. I did not state that demand was high only that I desired it
and it would be useful for many applications. A low cost SOT23-5
design would minimize board space and passive requirements.
Applications include IR/Ultrasonic sensing/communication carrier
waves, high freq. power circuits, sine tone generation, etc. and the
list is likely almost as long as the number of contributors. I also
see other posts looking for a similar part, and there are many circuit
designs available attempting with different degrees of success to
provide minimal &/or low distortion sinewave generators.

If I need a single sinewave I will select a lower cost resistor
configured SPT23-5 part over an XR2206 everytime. The same would apply
for multiple sinewaves, or freq. &/or amplitude modulation designs.

Whether or not the part is currently economically viable I cannot be
certain, however based upon its merits I suspect that at the right
price it is. In the past I have found myself looking for something
that did not exist, yet did appear on the market a short time later
(SSDs are one example) and this can be a case of many people
recognizing a need and the required technological state of development
at the same time.

The prior development path that you outline is very interesting (and
I agree that the requirements for triangle/square & sine wave
generation are substantially different), however remarkable new
designs keep appearing on the market, such as programmable micro
crystal oscillators, digital pots, or a low cost 0.4uV offset 5MHz R2R
1.1mApower opamp in an SOIC8 format, as manufacturers push back the
boundaries. It may well soon be time to rethink the sinewave generator
and develope a med-high spec almost trivial to configure option(s) in
a minimal package, perhaps using PLL, MEMs, state machine/uC internal
control/stabilization, uPower techniques etc.

It gets my vote. I seem to be always in need of just such a simple sine wave
generator, the last time being last week when all I wanted was a 1kHz 1V
sine wave as a test signal on a board. A few % distortion would have been
fine.
It's always amazed me that a simple SOT-23-5 or SO8 device like that has not
been produced.
If you build it, they will come...

Dave.- Hide quoted text -

- Show quoted text -

Buy a used function generator off ebay and be done with it.
.

Relevant Pages

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