On 5/3/2012 7:53 PM, Joerg wrote:> While looking at a single sideband receiver project that may be coming > up I checked the usual suspects for quadrature demodulators. Many won't > (technically ...) go much below 100MHz. Some do and I need to be more in > the 5-10MHz region. But they are massive guzzlers when it comes to > draining the battery. Like this one which slurps a whole watt (!): > > http://cds.linear.com/docs/Datasheet/5584f.pdf > > Isn't there anything better out there that hasn't been discontinued? Or > do I have to roll my own again? >Would this do you any good?.... http://www.silabs.com/products/audiovideo/amfmreceivers/Pages/Si4840-44.aspx Mind the wrap.
Any low power low frequency quadrature receivers?
Started by ●May 3, 2012
Reply by ●May 4, 20122012-05-04
Reply by ●May 4, 20122012-05-04
On Fri, 04 May 2012 11:53:11 -0500, John S wrote:> On 5/3/2012 7:53 PM, Joerg wrote: >> While looking at a single sideband receiver project that may be coming >> up I checked the usual suspects for quadrature demodulators. Many won't >> (technically ...) go much below 100MHz. Some do and I need to be more >> in the 5-10MHz region. But they are massive guzzlers when it comes to >> draining the battery. Like this one which slurps a whole watt (!): >> >> http://cds.linear.com/docs/Datasheet/5584f.pdf >> >> Isn't there anything better out there that hasn't been discontinued? Or >> do I have to roll my own again? >> >> > Would this do you any good?.... > > http://www.silabs.com/products/audiovideo/amfmreceivers/Pages/Si4840-44.aspx> > Mind the wrap.! I wonder if it can be operated at an arbitrary receive frequency, or if it's bound to the AM and FM bands. -- My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits & Software http://www.wescottdesign.com
Reply by ●May 4, 20122012-05-04
On Fri, 04 May 2012 12:24:27 -0500, Tim Wescott <tim@seemywebsite.com> wrote:>On Fri, 04 May 2012 11:53:11 -0500, John S wrote: > >> On 5/3/2012 7:53 PM, Joerg wrote: >>> While looking at a single sideband receiver project that may be coming >>> up I checked the usual suspects for quadrature demodulators. Many won't >>> (technically ...) go much below 100MHz. Some do and I need to be more >>> in the 5-10MHz region. But they are massive guzzlers when it comes to >>> draining the battery. Like this one which slurps a whole watt (!): >>> >>> http://cds.linear.com/docs/Datasheet/5584f.pdf >>> >>> Isn't there anything better out there that hasn't been discontinued? Or >>> do I have to roll my own again? >>> >>> >> Would this do you any good?.... >> >> http://www.silabs.com/products/audiovideo/amfmreceivers/Pages/ >Si4840-44.aspx >> >> Mind the wrap. > >! > >I wonder if it can be operated at an arbitrary receive frequency, or if >it's bound to the AM and FM bands.Why not roll your own with MC1596-style (Gilbert) multipliers? Or use an amplifier with Gilbert-style AGC, like the MC1590? ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
Reply by ●May 4, 20122012-05-04
Tayloe mixers excell here. The Ham SDR guys have all sorts of nice very low power designs, and the signal processing can be analog all pass filters. Google "Softrock" SDR.. While not a single chip, with modern SMD you could get it quite small. Steve
Reply by ●May 4, 20122012-05-04
On 4 Maj, 19:35, Jim Thompson <To-Email-Use-The-Envelope-I...@On-My- Web-Site.com> wrote:> On Fri, 04 May 2012 12:24:27 -0500, Tim Wescott <t...@seemywebsite.com> wrote: > >On Fri, 04 May 2012 11:53:11 -0500, John S wrote: > > >> On 5/3/2012 7:53 PM, Joerg wrote: > >>> While looking at a single sideband receiver project that may be coming > >>> up I checked the usual suspects for quadrature demodulators. Many won't > >>> (technically ...) go much below 100MHz. Some do and I need to be more > >>> in the 5-10MHz region. But they are massive guzzlers when it comes to > >>> draining the battery. Like this one which slurps a whole watt (!): > > >>>http://cds.linear.com/docs/Datasheet/5584f.pdf > > >>> Isn't there anything better out there that hasn't been discontinued? Or > >>> do I have to roll my own again? > > >> Would this do you any good?.... > > >>http://www.silabs.com/products/audiovideo/amfmreceivers/Pages/ > >Si4840-44.aspx > > >> Mind the wrap. > > >! > > >I wonder if it can be operated at an arbitrary receive frequency, or if > >it's bound to the AM and FM bands. > > Why not roll your own with MC1596-style (Gilbert) multipliers? > > Or use an amplifier with Gilbert-style AGC, like the MC1590? >quickly takes up a lot of space -Lasse
Reply by ●May 4, 20122012-05-04
John S wrote:> On 5/3/2012 7:53 PM, Joerg wrote: >> While looking at a single sideband receiver project that may be coming >> up I checked the usual suspects for quadrature demodulators. Many won't >> (technically ...) go much below 100MHz. Some do and I need to be more in >> the 5-10MHz region. But they are massive guzzlers when it comes to >> draining the battery. Like this one which slurps a whole watt (!): >> >> http://cds.linear.com/docs/Datasheet/5584f.pdf >> >> Isn't there anything better out there that hasn't been discontinued? Or >> do I have to roll my own again? >> > > Would this do you any good?.... > > http://www.silabs.com/products/audiovideo/amfmreceivers/Pages/Si4840-44.aspx > > > Mind the wrap. >Almost ... but: According to the datasheet its DSP is limited to a cast-in-concrete command set. It doesn't allow piping I and Q straight through but does AM detection. No independent sideband processing :-( -- Regards, Joerg http://www.analogconsultants.com/
Reply by ●May 4, 20122012-05-04
On 5/4/2012 1:24 PM, Joerg wrote:> John S wrote: >> On 5/3/2012 7:53 PM, Joerg wrote: >>> While looking at a single sideband receiver project that may be coming >>> up I checked the usual suspects for quadrature demodulators. Many won't >>> (technically ...) go much below 100MHz. Some do and I need to be more in >>> the 5-10MHz region. But they are massive guzzlers when it comes to >>> draining the battery. Like this one which slurps a whole watt (!): >>> >>> http://cds.linear.com/docs/Datasheet/5584f.pdf >>> >>> Isn't there anything better out there that hasn't been discontinued? Or >>> do I have to roll my own again? >>> >> >> Would this do you any good?.... >> >> http://www.silabs.com/products/audiovideo/amfmreceivers/Pages/Si4840-44.aspx >> >> >> Mind the wrap. >> > > Almost ... but: According to the datasheet its DSP is limited to a > cast-in-concrete command set. It doesn't allow piping I and Q straight > through but does AM detection. No independent sideband processing :-( >Well, then, how about the AD8339?
Reply by ●May 4, 20122012-05-04
On 04/05/12 02.53, Joerg wrote:> While looking at a single sideband receiver project that may be coming > up I checked the usual suspects for quadrature demodulators. Many won't > (technically ...) go much below 100MHz. Some do and I need to be more in > the 5-10MHz region. But they are massive guzzlers when it comes to > draining the battery. Like this one which slurps a whole watt (!): > > http://cds.linear.com/docs/Datasheet/5584f.pdf > > Isn't there anything better out there that hasn't been discontinued? Or > do I have to roll my own again? >How about this one?: 12V 50mA (74HC4052 based): Direct Conversion HF Receiver with DDS VFO, OH2NLT and OH7SV: http://www.nikkemedia.fi/juma-rx1/index-en.html - 12V 11mA: Very High Performance Image Rejecting Direct Conversion Receivers Or how can an 11 ma receiver out perform the world�s best ham transceivers?: http://www.norcalqrp.org/files/AustinNC2030Presentation.pdf - 144MHz All Mode Transceiver: http://www.qsl.net/va3iul/144MHz%20All%20Mode%20Transceiver/2m_allmode.html MC1496: http://www.onsemi.com/PowerSolutions/product.do?id=MC1496 - More here: http://home.pages.at/chirt/Projects/HDR2005/ref/ref.htm Glenn
Reply by ●May 4, 20122012-05-04
On Fri, 04 May 2012 10:35:12 -0700, Jim Thompson wrote:> On Fri, 04 May 2012 12:24:27 -0500, Tim Wescott <tim@seemywebsite.com> > wrote: > >>On Fri, 04 May 2012 11:53:11 -0500, John S wrote: >> >>> On 5/3/2012 7:53 PM, Joerg wrote: >>>> While looking at a single sideband receiver project that may be >>>> coming up I checked the usual suspects for quadrature demodulators. >>>> Many won't (technically ...) go much below 100MHz. Some do and I need >>>> to be more in the 5-10MHz region. But they are massive guzzlers when >>>> it comes to draining the battery. Like this one which slurps a whole >>>> watt (!): >>>> >>>> http://cds.linear.com/docs/Datasheet/5584f.pdf >>>> >>>> Isn't there anything better out there that hasn't been discontinued? >>>> Or do I have to roll my own again? >>>> >>>> >>> Would this do you any good?.... >>> >>> http://www.silabs.com/products/audiovideo/amfmreceivers/Pages/ >>Si4840-44.aspx >>> >>> Mind the wrap. >> >>! >> >>I wonder if it can be operated at an arbitrary receive frequency, or if >>it's bound to the AM and FM bands. > > Why not roll your own with MC1596-style (Gilbert) multipliers? > > Or use an amplifier with Gilbert-style AGC, like the MC1590?Board space -- that's what the whole discussion about NE612 mixers, and CMOS switches, etc., was about. -- My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits & Software http://www.wescottdesign.com
Reply by ●May 4, 20122012-05-04
Glenn wrote:> On 04/05/12 02.53, Joerg wrote: >> While looking at a single sideband receiver project that may be coming >> up I checked the usual suspects for quadrature demodulators. Many won't >> (technically ...) go much below 100MHz. Some do and I need to be more in >> the 5-10MHz region. But they are massive guzzlers when it comes to >> draining the battery. Like this one which slurps a whole watt (!): >> >> http://cds.linear.com/docs/Datasheet/5584f.pdf >> >> Isn't there anything better out there that hasn't been discontinued? Or >> do I have to roll my own again? >> > > How about this one?: > > 12V 50mA (74HC4052 based): > > Direct Conversion HF Receiver with DDS VFO, OH2NLT and OH7SV: > http://www.nikkemedia.fi/juma-rx1/index-en.html >That's the good old classical way with a very "busy" schematic: http://www.nikkemedia.fi/juma-rx1/juma-rx1-main-SCH-Rev-E.pdf> - > > 12V 11mA: > > Very High Performance Image Rejecting Direct Conversion Receivers > Or how can an 11 ma receiver out perform the world�s best ham > transceivers?: > http://www.norcalqrp.org/files/AustinNC2030Presentation.pdf >Almost the same.> - > > 144MHz All Mode Transceiver: > http://www.qsl.net/va3iul/144MHz%20All%20Mode%20Transceiver/2m_allmode.html >Yikes! Somebody must have been vey patient at the soldering station :-)> MC1496: > http://www.onsemi.com/PowerSolutions/product.do?id=MC1496 >You get one lone mixer in a fairly big package, like with the SA612. After it's all said and done you've got a whole big circuit board full of stuff. I just won't have that much space in this case.> - > > More here: > http://home.pages.at/chirt/Projects/HDR2005/ref/ref.htm >Thanks, Glenn. Unfortunately none of the authors seems to have found a more integrated solution than the usual concoction of single-part mixers and logic chips. If I absolutely have to I'll probably use logic chips, the main reason being that those can now be bought in TSSOP packages whereas mixers can't be. -- Regards, Joerg http://www.analogconsultants.com/
