Suggested by General Electric in a 1968 documentation this integrated amplifier uses a component of the era, the PA237. The circuit runs on 24 V and excites a 16-ohm speaker.
MXT1665T-A Family from Microchip Brings the User Experience of Multi-Touch HMI into the VehicleCHANDLER,...
This circuit can use a pendulum sensor. We found this configuration in a 1994 publication. The...
This unusual configuration, due to the component it uses, was found in an old European...