This circuit for VCR recording heads was found in the February 1990 issue of Radio Electronics magazine. The circuit is use do observe signal in an oscilloscope.
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...