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From: | Eric Brombaugh |
Subject: | Re: [Discuss-gnuradio] Analog Devices RF RX/TX subsystems for Spartan-3AN FPGA |
Date: | Thu, 17 Jun 2010 11:08:13 -0700 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100430 Fedora/3.0.4-2.fc11 Thunderbird/3.0.4 |
On 06/17/2010 09:58 AM, Elvis Dowson wrote:
Hi, I would like to design a custom board based on the Spartan-3AN FPGA, based on the Spartan-3AN FPGA Starter Kit, but would like to build my own RF front-end. http://www.analog.com/en/rfif-components/rxtx-subsystems/products/index.html If I look at the AD9874 IF-to-Bits RX subsystem component http://www.analog.com/en/rfif-components/rxtx-subsystems/ad9874/products/product.html it contains an ADC and a whole bunch of other stuff. Could someone help me by pointing out what other components or parts I should be looking at to build the RF receiver front-end to start with, assuming that I am going to learn from the USRP2 design, and the fact that it already has the Spartan-3AN FPGA, and I'm going to build my own RF front-end?
Designing an RF frontend from scratch sounds like a challenge, and the AD9874 requires a fair amount of support circuitry. Have you considered trying something a bit more integrated? How about this:
http://sdrtrack.drupalcafe.com/While that project isn't getting a lot of support lately, there are schematics and supporting materials available and the part that it's based on is highly integrated and fairly inexpensive:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-21570-1-ND Eric
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