Low Frequency Doubler MC1556G (CB14564E)

This circuit is from Motorola's 1990 Linear Databook. The circuit employs a component that is no longer common today.

Transmitter for Thermocouple LM10 (CB14312E)
The components used in this National Semiconductor circuit are not common today, but the...
Mike Gain Increaser (CB17253E)
This 2001 circuit is used with transceivers to increase the gain of a microphone and thus obtain...
2-Transistor Regulator (CB20298E)
In the figure we have the configuration of a variable voltage regulator with two transistors and a...