7-segment display driver (CB20551E)

We found this circuit in English documentation from 1996 for PCs. The circuit is for common cathode display.

High Impedance Probe (CB6454E)
Originally suggested by Electronic Design in a 1965 documentation for use with oscilloscopes, this probe has...
Integrated FM Radio (CB14571E)
This circuit uses currently uncommon components, including the 10.7 MHz (FI) filter. This circuit was...
LASCR Tachometer (CB9351E)
This optical tachometer with LASCR was found in a 1965 General Electric documentation. The diode at...