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RFRXD0420 Fiches technique(PDF) 21 Page - Microchip Technology

No de pièce RFRXD0420
Description  UHF ASK/FSK/FM Receiver
PDF  32 Pages
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Fabricant  MICROCHIP [Microchip Technology]
Site Internet  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

RFRXD0420 Fiches technique(HTML) 21 Page - Microchip Technology

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 2003 Microchip Technology Inc.
Preliminary
DS70090A-page 21
rfRXD0420/0920
3.4
Frequency Modulation (FM)
Figure 3-16 illustrates an example FM application
circuit.
3.4.1
FSK DETECTOR
FM demodulation is performed in the same manner as
described in the FSK section above.
3.4.2
OPERATIONAL AMPLIFIER
The internal operational amplifier is configured as an
active low-pass filter.
FM audio is typically de-emphasized. It is recom-
mended that de-emphasis circuitry be connected at the
output of the operational amplifier rather than the
output of the detector.



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