We found this circuit in a 70s Electronic Design documentation. The circuit uses general-purpose transistors from the time. Linearity is better than 0.25%.
This circuit is based on an operational amplifier that must be powered by a symmetrical source. The...
This circuit was found in Japanese documentation from the 1960s. It is a commercial circuit with...
This is the transmitter for a remote-control system published in the August 1986 issue of Radio...