Op-Amp as Difference Amplifier or Op-Amp as subtractor / Differential amplifier - YouTube
Op Amp - Subtractor - CircuitLab
How does an op-amp as a subtractor work? - Quora
operational amplifier - Op-amps in series – why does this op-amp subtractor not subtract? - Electrical Engineering Stack Exchange
LM358-N: Help designing cascading amplifiers: voltage subtractor outputting to a non-inverting amplifier - Amplifiers forum - Amplifiers - TI E2E support forums
operational amplifier - Subtractor op-amp configuration to find the diference of 2 signals - Electrical Engineering Stack Exchange
Arithmetic Circuits
Differential Amplifier - The Voltage Subtractor
Differential Amplifier or Voltage Subtractor Circuit
Op Amp Differential Amplifier Circuit | Voltage Subtractor
How does an op-amp as a subtractor work? - Quora
Solved The op amp in the adder-subtractor circuit shown in | Chegg.com