There is not a snow ball's chance in hell that patent is either valid or enforceable. I cannot believe the U.K. patent office has become as completely USELESS as ours and serves ONLY to line the pockets of intellectual property lawyers. Anyway, in 3 years the patent has expired under U.S. law since we observe no patents longer than 14 years.
DISGUSTING. In the middle 1980's, I gave a paper describing I/Q demodulators for all modes to AEA when I was trying to talk them into letting me build the first hybrid DSP/analog transceiver. As an "intermediate" step, the AEA 1232/2232 was designed, came out, and then AEA disintegrated before my eyes after the business manager died of cancer. The DSP1232/2232 used I/Q techniques throughout the bloody thing and was in production in 1989. It's Dayton debut was in 1990. Please give me Forster's address so I can threaten to sue him for stealing my intellectual property. (Yes my tongue is firmly in my cheek). IF ANYONE can tell me that taking the modulus of a complex number is patentable in a manner that is sustainable in court, I will personally kiss your rosey red one. I am so sick of this patent crap I am ready to explode. I cannot even believe that this guy does not have a synchronous receiver. It is nothing more than a bloody full wave rectifier for I/Q receivers FOR GOD'S SAKE. Bob Chris Hirt wrote: >I also checked the links from Tom and John about Forsters ideas >respectively patents. > >Patent >http://gb.espacenet.com/search97cgi/s97_cgi.exe?action=View&VdkVgwKey=GB2295513A&DocOffset=1&DocsFound=3&QueryZip=%28edward+AND+forster%29+%3CIN%3E+pa&Collection=dips&SearchUrl=http%3A%2F%2Fgb%2Eespacenet%2Ecom%2Fsearch97cgi%2Fs97%5Fcgi%2Eexe%3Faction%3DFilterSearch%26QueryZip%3D%2528edward%2BAND%2Bforster%2529%2B%253CIN%253E%2Bpa%26Filter%3Dgb%252Fen%252Fespacefilt%252Ehts%26ResultTemplate%3Dgb%252Fen%252Fresults%252Ehts%26Collection%3Ddips%26ResultStart%3D1%26ResultCount%3D10&ViewTemplate=gb/en/textdraw.hts&ViewErrorTemplate=gb/en/incerror.hts&DocsFound1=3&BeginHighlight=%3Cspan%3E&EndHighlight=%3C/span%3E&HLNavigate= >--> Thanks Tom ! > >E.C. Forster Page >http://ecforster.netfirms.com/AMRecdoc/Doc1.html >http://ecforster.netfirms.com/GB2295513/Doc1.html >--> Thanks John ! > >My experimental homebrew receiver "HDR-2005" now consists of >LPF-QSD-PolyphaseFilter-SSBdemod-LPF-(SCAF BPF)-AFamp. I work just now >on a new SCAF BPF and notch-filter. But I am absorbed in thought about >AM analog hardware demodulation of the I/Q channels ! >As soon as the time and the XYL permit it, I try to understand >Forsters patent or I found an other possibility ;-) > >Chris > > > >--- In [email protected], Frank Eory <[EMAIL PROTECTED]> wrote: > > >>John, >>I checked your links. Looks interesting. I don't quite see the ^2 >>function at http://ecforster.netfirms.com/GB2295513/fig2.gif which is >>used for the computation of i^2 and q^2 and I don't get the square root >>either yet. It looks more like two diodes in series, which has an >>exponential voltage-current function, which is not that far. I still >>don't see the sqrt yet. I just received a TI quad switch and a low >>noise op amp that I'll hook up single ended RF to double ended input to >>the op amp, essentially like flexradio. The only difference is that I >>have a quad switch like the IC used in softrock40. I'll be able to try >>out that idea in the patent. Chris should be able to try it faster >>since his rig is already done. >> >>For testing, I think I'll use a ad9850 DDS which I'll modulate with >>1kHz maybe with a SA602 mixer. (I might try out a switch modulation, >>just like the TX side of flexradio). I'll make attenuate it down and >>check the sinad for 10dB. I'll use an LMS to adjust the phase of a 1kHz >>signal, subtract it to the demodulated audio and calculate the noise >>and signal powers. I will then have a sensitivity in uV for the rig. >>With a little work, I could fft the noise and demodulated signals too. >> >>Frank >> >> > > > > > > > > > >Yahoo! Groups Links > > > > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> Get fast access to your favorite Yahoo! Groups. Make Yahoo! your home page http://us.click.yahoo.com/dpRU5A/wUILAA/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/
