7-segment display driver (CB20551E)

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

Second IF Amplifier Stage (CB936E)
For reference only, this is the second IF amplifier stage of a common transistor radio from the...
Guitar Tremolo (CB6709E)
This circuit is from an Electronics World of 1964. The circuit can be made with modern...
741 Logarithmic Amplifier (CB25723E)
This logarithmic gain operating configuration was found in the June 1994 Electronics Now magazine. The...