Post subject: Differential output of RF transceiver
Unread postPosted: Thu Mar 24, 2005 12:03 pm
When it is
mentioned that the output of the RF transceiver chip is differential,
what does it exactly mean?
Why can't we connect the differential
output of the RF chip directly to the antenna? and what interface
What other kinds of outputs can be provided
in the transceiver IC?
Thanks in advance for your comments
Unread postPosted: Tue Mar 29, 2005 1:59 pm
There are other names for balanced outputs: differential,
push-pull, and so on. The chip provides them so you can get the
rated power more easily with the circuitry they can put on a chip.
The opposite is "single-ended" or "unbalanced".
need either a transformer or balun to get to single-ended, which
you need for most antennas. These are too bulky to fit on an IC,
so they "let" you use one externally. ("Require" is more like it,
if you want the rated power!)
Without a frequency range,
I can't help on what the most appropriate device would be.
Unread postPosted: Fri Apr 01, 2005 12:02 am
Thanks a lot
for your suggestion and help.
My frequency range is between
3.1-10.6 GHz. Can you suggest me what devices should i go for?
Also, the transceiver chip that I'm going for may have a balun
fitted in the chip (sometime later this year). Does that mean that
i can directly connect the antenna to the chip?
Thu Apr 07, 2005 4:40 pm
Thu Apr 07, 2005 4:03 pm
Maybe this will help:
http://www.odyseus.nildram.co.uk/RFMicr ... Design.pdf