Difference between revisions of "Superhet Receiver Design"

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* Couples antenna to RF Amp and suppresses out of band signals
 
* Couples antenna to RF Amp and suppresses out of band signals
 
* [[RF Band Pass Filters]]
 
* [[RF Band Pass Filters]]
 +
* [https://tools.analog.com/en/filterwizard/ Analog Devices Filter Wizard]
  
 
== RF Amp ==
 
== RF Amp ==

Revision as of 19:27, 30 September 2021

Block Diagram

SuperhetBlockDiagram.png

Pre-selector / Bandpass Filter

RF Amp

ADE-1 Mixer

Crystal Filters

  • Located between First mixer and IF Amplifier
  • SSB or CW filter
    • SSB4
  • CW5

VFO/Local and BFO Oscillators

  • VFO-003
    • Si5351A based
    • Arduino Pro Mini
    • OLED Display
      • Detachable for remote mounting
    • Controlled by Rotary Encoder
    • Temperature Controlled Crystal Oscillator
    • Triple output (uses 2 of the 3 outputs)
      • VFO for received frequency plus 9 MHZ

IF Amplifier

ADE-1 Mixer / Demodulator

Pre-Amp / AF Amp