This circuit makes use of comparators and common operational amplifiers, having been found in Motorola Linear Interface ICs of 1993. The circuit requires symmetrical source.
This small signal-following amplifier uses an integrated one that is not very common nowadays. Powered...
The resonant circuit depends on the crystal frequency that can go up to a few megahertz. The...
This direct conversion receiver circuit was found in Radio Electronics from the 90s. The...