This circuit was found in the July 1988 issue of Radio Electronics magazine. It makes use of an operational transconductance amplifier (OTA) still in use today.
We found this circuit in a documentation from the 90s. It lets frequencies around 1 kHz pass,...
This circuit was found in a1980s Motorola documentation. The integrated circuit is from that time....
This symmetrical configuration uses two operational amplifiers to obtain the rectification of a...