300 to 3,000 Hz Speech Filter (CB6543E)

Found on an 80's Radio Electronics, this two-section circuit is designed to pass the frequency range of the human voice.

| Clique na imagem para ampliar |

Voltage Follower 747 (CB19905E)
The 747 is an old operational amplifier. This configuration suggested in the component manual is...
Precision programmed amplifier (CB7264E)
Suggested by Siliconix in 1980s documentation, this circuit uses currently uncommon components. The...
Piezoelectric Driver 1 (CB21153E)
In the figure we have a circuit to excite a piezoelectric capsule taking advantage of its resonant...