Second order active voice filter (CB7568E)

This filter for the 300 Hz to 3 kHz range was found in an American documentation from the 90's. The operational amplifier is a double 741.

| Clique na imagem para ampliar |

UHF amplifier (CB10063E)
This amplifier was found in a 70s documentation. The product gain x bandwidth is 350 MHz. The...
Trill Generator (CB21241E)
This circuit mimics the trill of a bird. We found it in an American documentation from the 90s. It is...
Pulsator (CB14824E)
With the values indicated for this circuit, the lamp will flash 60 times per minute (1 per...