Patent ID: 7821327

Claim:
An input receiver system, comprising: a comparator for comparing an external voltage and a reference voltage, comprising: a differential input module for generating a control signal by comparing the external voltage and the reference voltage, wherein the differential input module comprises: a differential amplifier with the external voltage coupled to a negative input node of the differential amplifier and the reference voltage coupled to a positive input node of the differential amplifier; a tail current source coupled to the differential amplifier; two loads coupled to two legs of the differential amplifier and wherein the tail current source is coupled to a ground and the two loads are coupled to an input/output (I/O) supply voltage; and a first stress protection module connected between the differential amplifier and the two loads for preventing the differential amplifier from exceeding a reliability limit of the differential amplifier; and a decision module for generating an inverter input signal based on the control signal; and an inverter for generating an output signal based on the inverter input signal, and wherein the reference voltage sets a dc trip point.