Hi Frank I think You mean not a LPF, but a Polyphase Network (Allpass Filter).
For SSB demodulation You take the I and Q channel from the QSD and turn one channel about 90°. Then You adding the channels and the result is USB. Or You subtract and the result is LSB. Many types of this filter turn both channels about 45° and the result is the same. In my HDR-2005 I use an active filter with 4 Dual-OPs (look at soft_radio/Files/HDR-2005). If You want, I send You a detailed schematic. My troubles with demodulation are not SSB (it sounds very good) but AM, You know ;-) Chris --- In [email protected], Frank Eory <[EMAIL PROTECTED]> wrote: > I saw a few months ago a low pass filter network after the Tayloe > detector. It had multiple stages and was made mostly (if not totally) > of passives. Could someone point me to a pdf schematic? > Frank ------------------------ 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/
