7-segment display driver (CB20551E)

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

Temperature Control (CB1575E )
With the figure circuit it is possible to control the amount of heat generated by the heating...
Bridge Balance Indicator (CB6068E)
This Texas Instruments circuit is from the 80's. However, it can be implemented with modern...
Voltage Variator LM3900 (CB5057E)
In the figure we have a circuit that allows us to obtain a variable voltage of approximately 0.5 to 25 V...