JCIPRNET
Current sensor
A current sensor includes a current sensing resistor, a first transistor, a second transistor, a bias voltage generating circuit, and a current mirror. The first terminal of the first transistor is coupled to the first terminal of the current sensing resistor. The first terminal of the second transistor is coupled to the second terminal of the current sensing resistor. The bias voltage generating circuit supplies a first bias voltage to the control terminal of the first transistor and a second bias voltage to the control terminal of the second transistor. The first bias voltage and the second bias voltage are dependent on the voltage of the first input terminal or the voltage of the second input terminal. The two current terminals of the current mirror are coupled to the second terminals of the second transistor and the first transistor, respectively.
VIA LABS, INC.
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Cheng-Ming Wei-Yu
Ying Wang