Negative Edge Differential Differential Amplifier LM3900 (CB4039E)

This circuit was found in the 1990 Motorola Linear Databook and can use almost any operational amplifier. The power supply must be symmetrical.

Emergency Lighting (CB3845E)
We find this efficient emergency lighting system in a 1987 publication. The circuit keeps a...
Transistor Audio Amplifier (CB920E)
This circuit was found in old publication from 1958. The circuit uses germanium transistor, common in...
Battery Charger with the TL317M II (CB1247E)
This circuit is in the very datasheet of Texas Instruments that manufactures the component...