[sdiy] VCO reference voltages

[Ian Fritz]

At 04:31 AM 4/16/2010, Simon Brouwer wrote:

>Using a 78L12 for local voltage reference could be a cheap option. Lightly
>loaded and supplied by a stabilized voltage, line and load regulation are
>hardly an issue; remains a ca. 0.008%/degC voltage drift.

That's 800 ppm/K.  I try to get under 100 ppm/K drift with my VCOs. Of 
course, I've just learned today that all my VCOs are crap, so what do I know?

Regulators like LM336 and LM4040 are inexpensive.  Many of us don't ever 
use 78xx regulators for *anything* because there are so many inexpensive 
devices with way better specs.

Ian