Only for reference this is a circuito f a commercial receiver of the year 1958. The circuit uses coils and transformers hadr to find in our days. The circuit is destinated to receive MW stations.
This 80's circuit has an input resistance of the order of 880 M and gain 10, using operational...
This circuit is powered by 1.5 V and has a long lifespan as it consumes only 320 uA. The circuit is...
This circuit provides a negative supply for circuit biasing. The current is very low. The voltage...