Patent ID: 8742780
Filing Date: 2014-06-03
Classification: G01R,H01L

Abstract:
1. A semiconductor device comprising: a resistor terminal connected to an external resistor; a reference voltage generator configured to generate at least one reference voltage; a detector configured to generate a detection signal based at least in part on a resistor terminal voltage and the at least one reference voltage, the detection signal indicating a state of an electrical connection to the resistor terminal, the resistor terminal voltage being a voltage at the resistor terminal; and an impedance calibration unit connected to the resistor terminal and configured to calibrate an input impedance and/or an output impedance for the semiconductor device in response to an impedance calibration signal, wherein the electrical connection is an external electrical connection between the resistor terminal and the external resistor, wherein the detection signal indicates whether the state of the external electrical connection between the resistor terminal and the external resistor is normal or abnormal, wherein the at least one reference voltage is based on a power supply voltage, wherein the semiconductor device is configured to simultaneously output the detection signal and calibrate the input impedance and/or output impedance for the semiconductor device, wherein the detection signal further indicates whether an internal electrical connection between the resistor terminal and the impedance calibration unit is normal or abnormal, and wherein the detector comprises: