VCO

[Steven Curtin]

>I'm not talking about a PLL but rather a high(100Khz and above)
>freq VCO,temp stable,and high linear scale VCO for 1V/Oct use?
>If you have a clever PLL design tell me about it to.
>(Not to many components)
>Does any one have a good ide'a on this issue, so lets hear it now!

A PLL would actually be a good idea.  This is what many modern processors
and DSPs do, since it's so hard to get a 200 MHz crystal to be accurate.
The DX4/100, for instance, has as its input a 30 MHz crystal and then
multiplies by three with a PLL (OK, so that makes is a DX3/99, but that's
marketing for you :)).  Likewise the 56004 and 56002 run at 80 MHz these
days using 40 MHz crystal input.  You would still need a high-frequency
oscillator but running it in series with a PLL would reduce its range
requirements.

Steve C

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Steven Curtin  
http://www.emf.org/people_curtin.html
Lucent Technologies - Bell Labs Innovations
rm. 3C-208, 200 Laurel Ave S
Middletown, NJ 07748-4801  U S A
ph: (908)957-2996   fax: (908)957-6878
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