Current limiter circuit system

A current limiter circuit system comprising:

• a steady state sensing circuit comprising:
• a first current mirror having a first input, a second input, a first output, and a second output, wherein the first input is connected to a first node, and the second input is connected to a second node;
• and
• a second current mirror having a first input, a second input, a first output, and a second output, wherein the first input of the second current mirror is connected to the first output of the first current mirror, the second input of the second current mirror is connected to the second output of the first current mirror, and the second output of the second current mirror is connected to a third node;
• wherein the first node is connected to a power source, the second node is connected to a load, and a scaled current flows at the third node and the scaled current is proportional to a voltage difference between the first node and the second node;
• a switching circuit, wherein the switching circuit limits an amount of current that flows between the power source and the load;
• a detection circuit connected to an output of the steady state sensing circuit and the switching circuit, wherein the detection circuit monitors the scaled current at the third node and controls the switching circuit to limit the amount of the current that flows between the power source and the load when the scaled current that is being monitored is greater than a desired level;
• a transient sensing circuit connected to the first node, the second node, and the detection circuit, wherein the transient sensing circuit limits the amount of the current that flows between the power source and the load when the current is a transient current that has a level that is greater than desired;
• and
• an enable circuit connected to the steady state sensing circuit, the detection circuit, and the switching circuit, wherein the enable circuit enables and disables the current that flows between the power source and the load.

An apparatus comprising:

• a steady state sensing circuit comprising a first current mirror having a first input, a second input, a first output, and a second output, wherein the first output is connected to a first node, and the second output is connected to a second node;
• and a second current mirror having a first input, a second input, a first output, and a second output, wherein the first output of the second current mirror is connected to the first output of the first current mirror, the second output of the second current mirror is connected to the second input of the first current mirror, and the second output of the second current mirror is connected to a third node;
• wherein the first node is connected to a first device, the second node is connected to a second device, and the steady state sensing circuit causes a scaled current to flow at the third node and the scaled current is proportional to a voltage difference between the first node and the second node;
• a switching circuit, wherein the switching circuit limits an amount of current that flows between the first device and the second device;
• and
• a detection circuit connected to the third node and the switching circuit, wherein the detection circuit monitors the scaled current at the third node and controls the switching circuit to limit the amount of the current that flows between the first device and the second device when the scaled current that is being monitored is greater than a desired level.

A current limiter circuit system comprising:

• a steady state sensing circuit comprising:
• a first current mirror having a first input, a second input, a first output, and a second output, wherein the first output is connected to a first node and the second output is connected to a second node;
• and
• a second current mirror having a first input, a second input, a first output, and a second output, wherein the first output of the second current mirror is connected to the first input of the first current mirror, the second output of the second current mirror is connected to the second input of the first current mirror, and the second output of the second current mirror is connected to a third node;
• wherein the first node is connected to a power source, the second node is connected to a load, and a scaled current flows at the third node and the scaled current is proportional to a voltage difference between the first node and the second node;
• a switching circuit, wherein the switching circuit limits an amount of current that flows between the power source and the load;
• a detection circuit connected to an output of the steady state sensing circuit and the switching circuit, wherein the detection circuit monitors the scaled current at the third node and controls the switching circuit to limit the amount of the current that flows between the power source and the load when the scaled current that is being monitored is greater than a desired level;
• a transient sensing circuit connected to the first node, the second node, and the detection circuit, wherein the transient sensing circuit limits the amount of the current that flows between the power source and the load when the current is a transient current that has a level that is greater than desired;
• and
• an enable circuit connected to the steady state sensing circuit, the detection circuit, and the switching circuit, wherein the enable circuit enables and disables the current that flows between the power source and the load.