Balanced Modulator MC1556G (CB14559E)

We found this circuit in Motorola's Linear Databook in 1990. The semiconductor component used is no longer common today.

Gain 100 Operational 741 (CB13537E)
This traditional configuration is from a 1976 publication, showing that nothing has changed since...
Low Battery Detector (CB6515E)
This circuit was found in an 80's EDN. The circuit uses a current common CMOS, the 4093 powering...
Dripper (CB10268E)
This circuit was obtained in a1969 magazine. The magazine no longer exists, but the circuit can be...