Voltage to frequency converter (CB8928E)

Found in ancient American documentation, this circuit uses an operational amplifier of the time, which is uncommon today.

| Clique na imagem para ampliar |

Ultrasonic Pickup (CB13321E)
The MOS field effect transistors of this circuit are not very common, as it is a project from the...
EMI filter on the interfering device (CB15429E)
If interference occurs in several receivers, much more interesting than placing a filter on each...
Li Ion Battery Charger (CB5410E)
This single-cell Li-Ion battery charger was found in a 2005 Linear Technology manual. The circuit...