Switched integrator (CB8871E)

Found in a1968’s Burr Brown documentation, this shield uses an integrated circuit from that time, which is uncommon today.

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...