Hi Harald,
On Thu, Mar 15, 2012 at 12:45:35AM +0100, Harald Welte wrote:
In fact, I already tried to make such a circuit using a Ti CDCVF25084 some time ago, but it wasn't as straight-forwardd as I hoped and it was never completed :(
A while back there was a posting[1] on the OpenBTS ML that mentioned positive results using this exact PLL as clock input for a USRP. The posting itself does not contain the part#, but I remember to have read it in a follow up post or so. This setup did not use a phone as input to the PLL, but nevertheless used such a PLL to feed the USRP.
Could you please elaborate on which problems you were facing?
Kind regards, -Alexander Huemer
[1] http://sourceforge.net/mailarchive/message.php?msg_id=24642256 [?] http://lists.osmocom.org/pipermail/baseband-devel/2010-April/000322.html