Can someone give me a copy of PA0DEN, Van Graas' QEX article ? 73 Ram, VU3RDD
On 10/23/05, Edson Pereira <[EMAIL PROTECTED]> wrote: > > 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 It should be entirely withdrawn.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 Links > > > > > > > -- 73 - Ramakrishnan, VU3RDD ------------------------ 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/
