Buffer for AD converters (CB9318E)

This circuit was obtained from Linear Technology documentation from the 90's. The circuit uses company components.

Laser Simulator 555 (CB7842E)
This circuit uses a high brightness LED to simulate a LASER. We found it in a 1991s PE Hobbyst...
Transformerless converter 220 V (240 V) to 110 V (CB1236E)
This interesting AC / AC converter is only indicated for resistive loads and was obtained in a...
Beta Meter (CB3804E)
This circuit uses a common multimeter on the voltage scale. The calibration of the scale should be...