The balun is required to convert the single-ended clock input to a
differential signal as required by the ADC. The balun is used on the
two single-ended analogue inputs for the same reason. There are no
baluns used on the data lines.
On 9/6/2012 8:04 AM, Sharath Raju wrote:
Hi,
I understand that a 1.5 GHz square-wave clock is fed to the KatADC
board. There is a Pulse Engineering CX2156 1:1 transformer between the
clock-in port and the clock pins of the ADC. What is the need for the
transformer ?
My guess is that it could have something to do with filtering out any
spurious high frequency noise picked up on the board ?
Also, I see that transformer used on the data lines too..
Quick link to block diagram:
https://casper.berkeley.edu/wiki/images/b/b0/KatADC_V13_block_diagram.png
--
Thanks,
Sharath Raju,
Graduate Student,
Electrical Engineering,
San Jose State University
[email protected] <mailto:[email protected]>
--
Etienne Bauermeister
MeerKAT (Karoo Array Telescope) Project
SKA SA
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South Africa
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