We found this circuit in the January 1979 issue of Radio Electronics magazine. Components are still common today, with the 7106 display driver standing out.
In this amplifier, the supply voltage is 35 V and the input resistance is 2k2. Equivalent...
This high speed laser diode driver was found in a 1980s documentation. Power FETs can be replaced...
This instrumentation amplifier with differential inputs was found in documentation from the 90s....