DTMF Decoder (CB25048E)

This circuit was found in the 1987 Radio Electronics magazine. The components used are integrated circuits of the time.

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Peak detector (CB9689E)
This detector with ultra-low deviation was found in an American documentation from the 90s....
Signal Injector (CB11934E)
This circuit produces a rectangular signal of approximately 1kHz, rich in harmonics, used for...
Astable Multivibrator Using Probes (MSB061E)
This low frequency astable multivibrator use two probes in the simulation. The probes ar found in...