For one it is not a patent violation to make and use a circuit for your own personal use, only when you try to make money from it does the patent have relevency
Secondly, given the frequency limitation and the fact Motorola seems to no longer have an interest in anything below several hundred megahertz, I doubt they have any real interest in spending a single dime to protect the patent although this could change when the technology speeds up like it always does eventually JR --- In [email protected], "dharmaBum" <[EMAIL PROTECTED]> wrote: > > Using a wideband ADC (the 16 bit, 130 MSPS/sec, LTC2208 for example) > 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 > ------------------------ Yahoo! Groups Sponsor --------------------~--> Get to your groups with one click. Know instantly when new email arrives http://us.click.yahoo.com/.7bhrC/MGxNAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
