Suggested by a 1965 Electronic Design, this circuit has a gain of 15 dB at 45 MHz and can be changed to operate on other frequencies. The tetrode FET is an uncommon component today.
Found in the August 1994 issue of Electronics Now, this CMOS circuit uses the 4046, which is...
This super metal detector uses three coils, operating in differential form with two transmitter and...
aaa The circuit shown generates 100 kHz signals for calibrating the scale of a receiver in 100 to...