Address decoder using the 74LS138 (CB20537E)

This decoder circuit 3 of 8 was found in a publication for PCs from 1992. The circuits are TTL and must be powered with 5 V.

80 W Amplifier (CB8949E)
This National Semiconductor circuit uses integrated circuits that are uncommon today. The circuit...
Fast peak detector (CB20893E)
This circuit was found in a National Semiconductor manual from the 1980s. The integrated circuits used...
Signal Follower (CB17509E)
This small signal-following amplifier uses an integrated one that is not very common nowadays. Powered...