"UWB-based Local Positioning System from a small-scale Experimental Platform to a large-scale Deployable System"
What are you phase noise or jitter requirements with integration bandwidth?
Based on the frequency accuracy requirement, you'll at least need a TCXO as your reference clock. Depending on your phase noise/jitter requirements, you could consider the following approaches:
Thanks for your reply.
We are using four channels of IEEE802.15.4a which are ch1.ch3.ch4.ch7 with center frequencies 3494.4 ,3993.6,4492.8 and 6489.6 MHz respectively .
Large channel spacing and spectral mask relax Phase Noise requirements for PLL.
Sorry I do not have exact number about Phase Noise .
What you suggest still the solution you proposed will be valid ,
Can you suggest any evaluation board which have both TCXO and Buffer.
The LMK00301 10-output differential clock buffer can be ordered here: http://www.national.com/pf/LM/LMK00301.html#Boards. As I mentioned before, a 4-output version of this device will be released soon. Performance and functionality will be very similar.
The evaluation board does not include the 26 MHz TCXO. However, it does have a 3.2 x 2.5 mm footprint (Y2) for a SMD crystal, which could accomodate a TCXO in the same package. You would need to disconnect the crystal Y1 and its load capacitors, and then install the TCXO with the proper connections. TCXO pins 1 & 2 = tie to GND, pin 3 = Output ac-coupled to OSCin pin, pin 4 = tie to VCC with nearby bypass cap).
I found a couple 3.3 V TCXOs in 3.2 x 2.5 mm footprint on Digi-key.
I was waiting for 4-output version of LMK00301 device. I guess LMK00304 is that . I try to order that online by Mouser . The shipping time to Sweden was 8 weeks.
We want the evlation board for LMK00304 in 2 week , Can you please tell any alternative ? Like placing order directly to TI or any other solution.
You can order the LMK00304EVM directly from TI via the tool folder: http://www.ti.com/tool/lmk00304evm
Just click the "Order Online" button. You will need to be logged in to your ti.com account. The user guide is available here.
The LMK00304 datasheet and IBIS model is available from the product folder: http://www.ti.com/product/lmk00304
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