One-transistor oscillator (CB22064E)

Capacitors C2, C3 and C4 determine the frequency of this simple oscillator. Transistor can be general purpose equivalent.

Telephone Amplifier II (CB19340E)
We found this telephone amplifier in a European publication from the 1980s. The transistor can be...
1.3 Ohm Analog Switch (CB15566E)
In figure 1 we have an application for NLAS5113, a new device from on Semiconductor...
Current Booster (CB6973E)
We found this circuit in a Popular Electronics from the 90s. Transistors can be modern...