Patent ID: 8437109
Filing Date: 2013-05-07
Classification: H02H

Abstract:
1. A power clamping circuit with temperature compensation, for a system voltage, comprising: a first diode, including an anode and a cathode, the cathode coupled to a ground, for generating a voltage with a negative temperature coefficient; a resistor with a positive temperature coefficient; a second diode, including an anode coupled to the resistor with the positive temperature coefficient, and a cathode coupled to the ground; a comparator, including a negative input terminal coupled to the anode of the first diode and a positive input terminal coupled to the resistor with the positive temperature coefficient; a transistor, including a gate coupled to an output terminal of the comparator, a drain coupled to the system voltage and a source coupled to the ground; a first resistor, coupled to the system voltage; a second resistor, coupled between the first resistor and the resistor with the positive temperature coefficient; a third resistor, coupled between the first resistor and the anode of the first diode; a fourth resistor, coupled between the positive input terminal of the comparator and the ground; and a fifth resistor, coupled between the negative input terminal of the comparator and the ground.