Broadband Balanced Mixer MC1556G (CB14563E)

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

High-gain amplifier (CB9019E)
Found in old American documentation, this circuit makes use of operational amplifiers from the 70s...
Timed Alarm with Lock (CB16825E)
This circuit was obtained from a 1997 publication. It is an alarm that has a lock and a bistable...
H-bridge drive circuit (CB23553E)
The above project is an H –H bridge drive circuit and can be used to drive DC motors and in the...