On Sun, 1 Apr 2012 19:10:59 +0000
shali...@gmail.com wrote:
> It seems to me that if standalone GPS timing receivers used a VCXO
> instead of a fixed frequency clock, the cost delta would not be that
> significant, and they too could avoid the need for sawtooth correction.
Not really. You'd need a low noise, low DNL, high resolution DAC to
stear the VCXO. Analog electronic costs considerably more than a tiny bit
of software and eats a lot more power.
Maybe you can get away with using one of the Silicon Labs programmable
oscillators instead of a VCXO and a DAC. But IIRC they only have a
frequency setting, no phase setting, so you need some way to fix the
phase offset.
Attila Kinali
--
Why does it take years to find the answers to
the questions one should have asked long ago?
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