Patent ID: 7978454
Filing Date: 2011-07-12
Classification: H02H

Abstract:
1. An integrated circuit chip comprising: a first external electrical connection structure; a first diode having an anode and a cathode, the anode of the first diode being connected to the first external electrical connection structure; a second diode having an anode and a cathode, the cathode of the second diode being connected to the first external electrical connection structure; a second external electrical connection structure, the second external electrical connection structure being unconnected to the first external electrical connection structure; a third diode having an anode and a cathode, the anode of the third diode being unconnected to the first external electrical connection structure, the cathode of the third diode being connected to the second external electrical connection structure; a comparator being connected to the first external electrical connection structure and the second external electrical connection structure; a transistor connected to the comparator, the transistor turning on in response to the comparator turning on, turning off in response to the comparator turning off, and being unconnected to the first external electrical connection; and an inverter connected to the cathode of the first diode and the anode of the second diode, the inverter having an input and an output, the input of the inverter being directly connected to the transistor, the input of the inverter being unconnected to the comparator.