This circuit uses a 7-segment display to indicate the logic level of a test circuit. The power supply is made with 5 V that can come from the analyzed circuit itself.
I found this circuit in a doc umentation from the year 1968. It uses germanium transistor and has...
January 2017 - The new Texas Instruments TLV354x series of operational amplifiers with 200 MHz...
This high gain small signal amplifier circuit was found in an old publication on transistors....