Patent ID: 8330526

Claim:
A low voltage detector, of comprising: a voltage and current reference circuit for producing a reference voltage V REF , wherein the voltage and current reference circuit includes a first self-cascode MOSFET structure (SCM), and wherein the first SCM produces V REF ; a power supply voltage monitor circuit, coupled to the voltage and current reference circuit and to a terminal voltage, for monitoring voltage of the terminal voltage and for producing a voltage V MON related to the voltage of the terminal voltage; and a voltage comparator, coupled to the voltage and current reference circuit and to the power supply voltage monitor circuit, for outputting a signal in response to a differential between V REF and V MON , wherein the low voltage detector has a trip point, and wherein V REF and V MON have a same behavior with respect to temperature, thereby reducing variation in the trip point with changes in temperature, wherein the power supply voltage monitor circuit includes a second self-cascode MOSFET structure (SCM), wherein the second SCM produces V MON , and wherein V MON defines the trip point of the low voltage detector.