Patent ID: 7876135

Claim:
A power-on reset device comprising: a reference generator module, coupled with a supply voltage, and configured to generate a reference level at a reference level node, the reference level having a first temperature coefficient; an input generator module, coupled with the supply voltage, and configured to generate an input level at an input level node, the input level having a second temperature coefficient, the second temperature coefficient being proportional to the first temperature coefficient; a comparison module, comprising a positive input terminal and a negative input terminal, the positive input terminal being coupled with the input level node and the negative input terminal being coupled with the reference level node, the comparison module being configured to produce an upward transition in an output level when the input level on the positive input terminal exceeds the reference level on the negative input terminal, the input level exceeding the reference level defining a trip-point, the trip point having a third temperature coefficient functionally related to a difference between the first temperature coefficient and the second temperature coefficient over a change in temperature; and a voltage adjustment module, configured to receive a system voltage and generate the supply voltage as a function of the system voltage.