I completely agree with Bob's words. Evidence for previous art is available in several places on the Internet. The following is another example.
http://ja2kai.ld.infoseek.co.jp/merigo.htm 73, -- Edson, pu1jte, n1vtn, 7n4ncl --- In [email protected], Robert McGwier <[EMAIL PROTECTED]> wrote: > > It is EXTREMELY clear why this must be brought up and often. If this > were "just" a Tayloe patent it would be one thing take record Tayloe's > words that he knows there is prior art. But it is a Motorola patent > since it was filed on Tayloe's behalf by Motorola. With one flick of a > switch, Motorola could squash Flex Radio and others who use the circuit > without paying royalties before they or Flex could even defend > themselves. All they would need would be to file and receive an > injunction on the business based on this patent and (say) Flex would go > bankrupt. Van Gras and many others have prior art and as such it is > imperative that early and often, before it becomes an issue in a court > of law that this patent be overturned and not recognized as having been > properly granted. It should be entirely withdrawn. It has already > prevented a license being paid for and as such is now a legal impediment > that must be officially overturned since the patent is completely > without merit. Tayloe's work is outstanding. The NC2030 is a beauty. > On the QSD, Van Gras was many years earlier and he used a fast > electronic switch and a fully balanced circuit in a QEX article and did > not patent what he knew was not a new idea. It is a simple matter of > needing to cover all bases. What does making sure that people who are > threat to your very livelihood have to do with jealousy? If the > existence of a patent that is without merit cost you tens of thousands > of dollars, what would be your response? > > Tayloe's work is great stuff. I admire Dan tremendously. He has lots to > contribute to our understanding of these mixers and other RF things. > That has nothing to do with the simple business decision to point out > every time I see, and I do mean every time I see "Tayloe detector" to > point out that this is an inappropriate name for this device. Tayloe, > Youngblood, Van Gras, Leif Asbrink and the MANY others who have used > these basic ideas are all to be thanked. The NC2030 and the latest > incarnation of the SDR-1000 show WHY this circuit is so important. With > the recent availability of high performance, high dyanmic range, and low > noise A/D converters at audio frequencies, we are in business. With > the realization that we had I/Q signal engines at our disposal, we can > now remove almost all of the impediments that use to present themselves > to these "near baseband" or "near direct conversion" frequency designs. > Alex, VE3NEA has shamed us all with his implementation of the automated > imbalance mitigation software and more and more of this kind of thing > will shove the old ways into the past. Good riddance and welcome to the > software defined radio period. > > Bob > N4HY > > > > > jr_dakota wrote: > > >People need to realize Dan did us all a favor by patenting this before > >some major corporation did it and kept us from using the circuit in > >devices like the Flex Radio ... I personally can't figure out why > >people get so upset over it other than envy, it's not like he's strong > >arming anyone for royalties, getting filthy rich or keeping anyone > >from using the circuit > > > >Dan may not have come up with the idea first but he simplified it, > >made it a practical reality for hobbyist/amateurs and popularized the > >circuit ... his latest design for Norcal QRP is a study in design > >genius, running audio range frequencies through half a dozen op amps > >using direct coupling (ie- no DC blocking caps between stages) is no > >easy design feat and the purity of the audio in that device should be > >outstanding and exceed 99% of the comsumer 'pro' sound hardware on the > >market today > > > >John > > > > > > > > > > > > > > > > > -- > Laziness is the number one inspiration for ingenuity. Guilty as charged! > ------------------------ 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/
