"The Si473x, Si474x and Si4707 devices are the industry's first fully
integrated, 100% CMOS AM/FM/SW/LW and WB radio receiver ICs. Offering
unmatched integration and PCB space savings, the Si47xx only requires
two external components and less than 15 mm² of board area excluding
the antenna inputs."

In chippic language, this thing has PGA, DSP, ADC, DAC. While there's
a PGA block that seems non-FP, the DSP is upgradeable - hence
reconfigurable, although I bet the code is closed and well guarded.

In radio language it implements 2x AGCed LNA, 4x balanced mixer, 2x I/
Q detectors, DSP demodulation, RDS/RMBS, both digital and analog audio
out (stereo of course).

https://www.silabs.com/products/audi...s/default.aspx

https://www.silabs.com/products/audi.../Si473435.aspx

The application notes document for antenna selection and layout is not
to be found on the Silicon Labs website, is still under NDA but a
version for a shortwaveless version has leaked from Russia.
http://delanet.ru/images/stories/pdf/AN383_si4711.pdf

Several chips in the that family have transmit capabilities too,
complete with varicap antenna tuner.

A quasi-SDR-SOC, taking up less room than a small knob.

spamhog wrote in :
"The Si473x, Si474x and Si4707 devices are the industry's first fully
integrated, 100% CMOS AM/FM/SW/LW and WB radio receiver ICs. Offering
unmatched integration and PCB space savings, the Si47xx only requires
two external components and less than 15 mm? of board area excluding
the antenna inputs."

In chippic language, this thing has PGA, DSP, ADC, DAC. While there's
a PGA block that seems non-FP, the DSP is upgradeable - hence
reconfigurable, although I bet the code is closed and well guarded.

In radio language it implements 2x AGCed LNA, 4x balanced mixer, 2x I/
Q detectors, DSP demodulation, RDS/RMBS, both digital and analog audio
out (stereo of course).

https://www.silabs.com/products/audi...s/default.aspx

https://www.silabs.com/products/audi.../Si473435.aspx

The application notes document for antenna selection and layout is not
to be found on the Silicon Labs website, is still under NDA but a
version for a shortwaveless version has leaked from Russia.
http://delanet.ru/images/stories/pdf/AN383_si4711.pdf

Several chips in the that family have transmit capabilities too,
complete with varicap antenna tuner.

A quasi-SDR-SOC, taking up less room than a small knob.

Drooooooolworthy!

--
" ... a language is just an dialect with an army and a navy."
-- written by someone very perceptive,
used by Paul Tomblin in a.s.r.