seems like a poor choice for a narrow band radio compared to the
simpler, cheaper and less power hungry Tayloe mixer approach. Of
course, there is something very satisfying to a purist about the
direct "antenna to bits" approach.
Can anyone help answer the following questions:
1. Which DDS has the best spur performance: AD9952 (14 bit DAC) or
the AD9958 (10 bit DAC)?
2. What exactly is legal status of the Tayloe mixer? Motorola owns
the patent (US # 6230000). There may be a great deal of prior art
that might render the patent without merit but I don't want to get
sued over a hobby. Did Flex-Radio license this patent from Motorola?
3. I'm still confused about how to calculate/estimate SNR, blocking
dynamic range and arrange gain distribution for a wideband ADC based
radio. Can someone point me to reference or use the previously
mentioned LT2208 as an example for a 3 KHz channel.
Thanks for any help or insights...
Wayne
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