Patent ID: 8598681

Claim:
An integrated circuit device, comprising: a die, including: a substrate; active circuitry formed on the substrate, the active circuitry including: a comparator formed from a plurality of transistors, the comparator having a first input and a second input; a Wheatstone bridge formed on the substrate above the active circuitry and electrically coupled to the active circuitry, the Wheatstone bridge including: a first thin film resistor coupled between a first interconnect and a second interconnect, the first resistor being temperature insensitive; a second thin film resistor coupled between the second interconnect and a third interconnect, the second resistor being temperature insensitive; a third thin film resistor coupled between the third interconnect and a fourth interconnect, the third resistor being temperature sensitive; and a fourth thin film resistor coupled between the first interconnect and the fourth interconnect, the fourth resistor being temperature insensitive, the second interconnect being coupled to the first input of the comparator and the fourth interconnect being coupled to the second input of the comparator.