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transceiver:start

Hamfox Transceiver

Heavily inspired by David Rowe's SM2000 VHF radio: http://www.rowetel.com/?p=4694

The receiver should be superheterodyne with IFs at 10.7 MHz and ~30 kHz. A/D conversion should be done directly at the microcontroller. A STM32 typically contains a PGA - let's use this for the last amp.

Receiver 70cm:
in → BPF → LNA → BPF → LNA → BPF → mixer → BPF 10.7 MHz → mixer → BPF 30 kHz → PGA → lowpass → ADC

List of possible parts:

  • LNA:
  • Mixer:
    • LT5560 (DC-4GHz, I=4…13mA, IIP3=+10dBm) 8-)
    • Analog ADL5350 (DC…4GHz, I=19mA, IIP3=+25dBm)
    • Analog AD831 (I=100mA, IIP3=+24dBm)
    • NXP SA612A
  • LO/PLL/TCXO:
    • 1x Si5334 (I=45mA :-| )
    • 1x Silabs Si5340 (I=120mA :-( )
    • 2x Silabs Si570 (I=100mA :-( )
    • 1x Texas Instruments LMX2485E (50 MHz…3GHz, I=5mA) + TCXO
  • Microcontroller:
    • ST STM32F4
transceiver/start.txt · Last modified: 2019/02/08 12:24 by stefan