Current Detection Circuit and Electronic Device

A current detection circuit comprising:

• a signal input terminal, a signal output terminal, a switch branch, a first current detection branch, and a second current detection branch, wherein:
• the switch branch and the first current detection branch are connected between the signal input terminal and the signal output terminal;
• the second current detection branch is connected to the signal input terminal and the first current detection branch;
• and
• the switch branch is configured to block the current flowing from the signal output terminal to the signal input terminal when the switch branch is turned off, and wherein:
• when the switch branch is conducting, the current flowing from the signal input terminal through the switch branch to the signal output terminal is a switch branch current comprising a first current linearly related to a first voltage difference and a second current exponentially related to the first voltage difference, and wherein:
• the first voltage difference is a voltage difference across the signal input terminal and the signal output terminal;
• the first current detection branch is configured to output a first detection current representing the first current;
• and
• the second current detection branch is configured to output a second detection current representing the second current.