VCO+PLL to synthesise 20-100Mhz for laser range finder proje

[Yannick]

I am trying to find a VCO with sinusoidal output to generate between
20 and 100Mhz (or more). The VCO's i saw from analog devices are for
+300Mhz. Anyone know some IC's wich are capable of doing this. A
complete Pll+VCO integrated would be even better ofcourse.

I am now using the AD9850 DDS as a frequency synthesiser but there is
much spur on the signal even after a 3th order elleptical filter.

Thanks in advance!

Yannick

 

[Uwe Bonnes]

Yannick <yannick_de_wit@pandora.be> wrote:
: I am trying to find a VCO with sinusoidal output to generate between
: 20 and 100Mhz (or more). The VCO's i saw from analog devices are for
: +300Mhz. Anyone know some IC's wich are capable of doing this. A
: complete Pll+VCO integrated would be even better ofcourse.

: I am now using the AD9850 DDS as a frequency synthesiser but there is
: much spur on the signal even after a 3th order elleptical filter.

A short search (at least at minicircuits) shows that there are no wide range
VCO available...

Bye
--
Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------

 

[Rene Tschaggelar]

Yannick wrote:

I am trying to find a VCO with sinusoidal output to generate between
20 and 100Mhz (or more). The VCO's i saw from analog devices are for
+300Mhz. Anyone know some IC's wich are capable of doing this. A
complete Pll+VCO integrated would be even better ofcourse.

I am now using the AD9850 DDS as a frequency synthesiser but there is
much spur on the signal even after a 3th order elleptical filter.

Thanks in advance!

There is a resistor controller oscillator, the LTC6905, from
linear technology, which uses 3 ranges (dividers) between 17
and 170 MHz.
There also are a few others.

Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net

 

[kerr]

http://www.ardice.com/Recreation/Radio/Amateur/VHF/50_MHZ

 

[Mac]

On Sun, 05 Dec 2004 23:19:11 -0800, kerr wrote:

http://www.ardice.com/Recreation/Radio/Amateur/VHF/50_MHZ

What, exactly, is the point of posting that?

It doesn't seem to have anything to do with the topic at hand.

--Mac