Micro-controlled VLF Receiver

My current receiver design, which has not been tested yet, has the following features:

  • Single 5V d.c. supply.
  • Gyrator-tuned.
  • Gyrator tuning and second stage amplifier gain adjustment by means of digital potentiometers.
  • Zero-crossing detector, precision full-wave rectifier, peak detector and d.c. level shifter.
  • Micro-controller (Freescale MC9S08SH8).
  • RS-232 serial port.

You can download the circuit diagrams here at your own risk. The circuit has not been tested and comes with no guarantees:

Download

 

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