> [EMAIL PROTECTED] wrote: > > > > There are ICs called "digital down converters" > from AD or Intersil... Does anybody have ever tried > to build an IQ-RX with those "guys"? > > Yes, the Analog Device AD6620 is one of them, and it > is used in that variety of SDRs that do A-to-D > conversion directly > at RF, then digitally down convert the numeric > stream to a more manageable (for the PC) sampling > rate. > The RFspace SDR-14 and SDR-IQ use that chip, as it > does the newly announced QS1R by Phil Covington >
If interested, I maintain on my site http://f4dan.free.fr/sdr_eng.html an updated and classified list of SDR project. The 3 projects quoted by Alberto are indeed part of the category "sampling by a dedicated RF ADC of a "direct antenna output" RF signal, and ASIC based DDC" DDC function is also sometimes implemented with an FPGA (e.g. : USRP, HPSDR and QS1R that has both FPGA and ASIC based DDC capabilities) Best 73's Christophe F4DAN __________________________________________________ Do You Yahoo!? En finir avec le spam? Yahoo! Mail vous offre la meilleure protection possible contre les messages non sollicités http://mail.yahoo.fr Yahoo! Mail _______________________________________________ Winrad mailing list [email protected] http://winrad.org/mailman/listinfo/winrad_winrad.org
