Sure wish you'd make it a little more public......... Many of us have interest in hardware implementations of QSD's, especially for simple and low power consumption QRP and portable operation. With a minimal sacrafice in performance, an HF hardware QSD receiver could be very practical for low power portable operation.
Regards, Art At 04:06 AM 8/29/2005, you wrote: >Hi all >many thanks for your suggestions about AM demod from I/Q signals! >It seems to be a very interesting subject. >Some ask for providing details: >The "HDR-2005" (Hardware Defined Radio ;-) is based on a SDR but only >realized with hardware. The core of the receiver is a double balanced >quadratur demodulator, similar the QSD from Gerald Youngblood AC5OG. >(http://www.flex-radio.com/articles_files/SDRFMP4.pdf) >After the QSD and a preamp follows an active polyphasefilter, OP for >sum or diff of the I/Q signals, a LPF/SCAF and a AF Amp. >Please look at FILES/HDR2005. There are a block diagram and a short >description. >My HDR-2005 is a homebrew receiver only for my privat pleasure. > >Chris > > > > > > >Yahoo! Groups Links > > > > > > > > > > >-- >No virus found in this incoming message. >Checked by AVG Anti-Virus. >Version: 7.0.344 / Virus Database: 267.10.16/83 - Release Date: 8/26/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.10.16/83 - Release Date: 8/26/2005 ------------------------ 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/
