This circuit for RF measurements at 200 MHz was found in no documentation two years 80. At a sensitivity of 1V peak and the components used are still common in these days.
This isolated shield uses a common optical coupler that supports several equivalents. The resistor in...
This 80's circuit has been winning. It is a 1 000 gain sample and hold circuit and an offset...
Suggested for use in cars and motorcycles, this circuit was found in a 90s Popular Electronics. The...