This circuit was obtained from an American 80's documentation. The balanced mixer can be shown in CB4234. The circuit is for controlling RF signals in a modulation system.
This circuit was suggested by Linear Technology in a 1980s documentation but can be implemented with...
This circuit is recommended by Texas Instruments in the datasheet of the TL317, equivalent to...
Unlike the previous circuit, this circuit has a low impedance input. The components can be changed to...