Micro-controlled VLF Receiver

My recent receiver design (circa 2011), which has neither been built nor tested, was to have 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 and try out the circuit if you wish, at your own risk. The circuit comes with no guarantees:


I now have other, more ambitious ideas for a receiver. But more about this later.


Bookmark the permalink.

Leave a Reply