This circuit was found in Maxim's documentation from the 90's. The configuration uses components from the time but can be adapted to use modern equivalents.
This circuit appeared in the June 1990 issue of Radio Electronics magazine. Integrated circuits must...
Lockout shooting, due to the incidence of light, can be achieved with the circuit in the figure. In...
This circuit can function either as a crystal or galena receiver with a pre-amplifier using a FET...