Operational amplifier with indirect current feedback current limiter

A system, comprising:

• an operational amplifier having:
• a positive signal input;
• a negative signal input;
• and
• an amplifier output;
• and
• a current limit circuit coupled to the amplifier output and configured to:
• generate an output current sense voltage in response to an output voltage of the operational amplifier;
• generate an output current feedback sense voltage responsive to the output current sense voltage;
• and
• limit an output current at the amplifier output responsive to the generated output current feedback sense voltage.

A current limiter comprising:

• an input;
• a first resistor coupled between the input and ground, the first resistor having a first terminal and a second terminal;
• a first amplifier having a first input connected to the first terminal of the first resistor, a second input connected to the second terminal of the first resistor, a first output and a second output;
• a second amplifier having a third input, a fourth input, a third output coupled to the second output of the first amplifier, and a fourth output coupled to the first output of the first amplifier;
• a second resistor coupled between the third input and the fourth input;
• a third resistor coupled between the second output and ground;
• and
• a fourth resistor coupled between the fourth output and ground.