Ferroelectric temperature sensor

An apparatus comprising:

• a processing circuit having a processing output, the processing circuit configured to:
• receive temperature sense signals from ferroelectric memory bit cells;
• detect a historical temperature excursion event based on the temperature sense signals;
• and
• provide an indication of the historical temperature excursion event at the processing output.

A method comprising:

• providing, by a sensor, control signals to perform read operations on groups of ferroelectric memory bit cells;
• receiving, by the sensor, first signals from the groups of ferroelectric memory bit cells responsive to the read operations;
• and
• for each group of the groups of ferroelectric memory bit cells, providing, by the sensor, second signals representing relationships between the first signals received from the group of ferroelectric memory bit cells and a respective reference voltage of reference voltages, the reference voltages representing different temperatures.

A method comprising:

• receiving, by a processor, temperature sense signals from ferroelectric memory bit cells;
• detecting, by the processor, a historical temperature excursion event based on the temperature sense signals;
• and
• outputting, by the processor, an indication of the historical temperature excursion event.