5 V reference LT1027 (CB14595E)

This circuit is from the 1993 Linear Technology Applications Databook. The component is uncommon today.

Constant volume amplifier (CB7095E)
This circuit has an automatic dynamic gain control in a range of 6 dB to 40 dB. We found it in...
Customer Service Counter (CB6141E)
This circuit can be used as an answering password system in a store, office, or other location....
Medium Power Transistorized Amplifier (CB12699E)
This circuit has a sensitivity of 200 mV providing an RMS power of around 4 W for a load of 8 ohms...