Patent ID: 6593801
Filing Date: 2003-07-15
Classification: G06F,Y02D

Abstract:
A differential receiver comprising:a true differential input and a complement differential input that together receive a differential signal from a differential transmitter; a differential amplifier that receives the true and complement differential inputs and generates an internal signal in a high state when the true differential input is at or above a high differential voltage and the complement differential input is at or below a low differential voltage, but generates the internal signal in a low state when the complement differential input is at or above the high differential voltage and the true differential input is at or below the low differential voltage; and equal-voltage detect means, coupled to the true and complement differential inputs, for activating a power-down signal when the true differential input is at a floating voltage and the complement differential input is also at the floating voltage for more than a predetermined period of time; wherein the equal-voltage detect means activates the power-down signal when the true and complement differential inputs are both at the floating voltage wherein the floating voltage is any voltage between the high differential voltage and the low differential voltage, whereby power-down is signaled by detecting the floating voltage between the high and low differential voltages on both the true and complement differential inputs for more than the predetermined period of time.