Sine to square converter (CB7329E)

Using a 555 this circuit was found in old documentation, but it is still valid.

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Current Monitor LT1789 (CB5224E)
This High Side Current Monitor was found in a 2005 Linear Technology White Paper. The circuit...
Video modulator (CB7170E)
Found in an old Radio Electronics, this circuit is intended for the modulation of composite video...
Four-quadrant photoconductive detector (CB20687E)
This circuit was found in documentation from the 90s. The operational amplifier is NE5514, which is...