This TTL shield with high level logic is from the LM111's own 80's manual. The integrated circuit is no longer easily found, but the circuit can be adapted to use modern equivalent operational amplifiers.
This circuit can be applied to several logics. The circuit is from an Electronics Now from the...
We found this circuit in the Linear Technology Applications of 1997. The circuit uses components of the...
This is the traditional configuration of an inverter amplifier with 100 voltage gain and...