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 … Continue reading