FET dual analog switch (CB7247E)

We found this circuit in 1969 American documentation. FETs admit equivalents, as do transistors. The circuit can be used as a shield.

| Clique na imagem para ampliar |

An electric heater (CB24186E)
This circuit is from a Radio Electronics issue of May 1972. It consists of a commercial heating...
Crystal test (CB7538E)
Found in the American 73 magazine for radio amateurs, this circuit can test common quartz...
Deviation Compensation Amplifier (CB14066E)
This circuit is from the 1995 National Semiuconductor Linear Application Handbook. The technique...