PLL (CB7971E)

This common operational PLL circuit was found in a Popular Electronics 90’s. The power supply need not be symmetrical.

Signal Follower (CB4240E)
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...
0 to 180 Degree PhaseShifter (CB4170E)
This circuit makes use of a PLL 567 to invert the phase of a signal, ie to change it from 0 to 180...
Small Motor Protection and Control Circuit (CB5404E)
We find this circuit in a 2005 Linear Technology manual. The circuit applies to small DC motors...