Rapid temperature change detection using slew rate

A method comprising:

• receiving a first data based on a measured first temperature value;
• receiving a second data based on a measured second temperature value;
• subtracting the first data from the second data to generate a primary data;
• measuring a time elapsed between measuring the first temperature value and the second temperature value to generate a shift value and a direction value;
• modifying the primary data based on the shift value and the direction value to generate a slew rate;
• and
• comparing the slew rate to a reference value.

A system comprising:

• a temperature sensor circuitry configured to measure a first temperature value and a second temperature value;
• a host configured to receive an alert pulse;
• and
• a digital core coupled to the temperature sensor and the host, the digital core further including:
• a register including an input and an output, and configured to receive at the input a first data based on the first temperature value, and to generate at the output a second data based on the second temperature value;
• a subtraction circuit including a first subtraction input, a second subtraction input, and a subtraction output, the first subtraction input coupled to the input of the register, the second subtraction input coupled to the output of the register;
• a timing circuit including a cycle time input, a shift output, and a direction output;
• and
• a division circuit including a division input, a shift input, a direction input, and a divided output, the division input coupled to the subtraction output, the shift input coupled to the shift output, the direction input coupled to the direction output.