Distributed spintronic/CMOS sensor network for thermal aware systems
A hybrid integrated thermal sensor device includes a magnetic tunnel junction (MTJ) device electrically coupled in series with at least one CMOS transistor and disposed between a voltage rail terminal and a ground terminal. An output terminal is electrically coupled to a drain of the at least one CMOS transistor. The MTJ operates in an anti-parallel state and the output terminal provides a voltage indicative of a temperature of the MTJ device based on an MTJ antiparallel resistance. A distributed sensor network for real-time thermal mapping of an integrated circuit (IC) is also described.
1. A distributed sensor network for real-time thermal mapping of an integrated circuit (IC) comprising:
a control unit disposed in said IC; and
a plurality of hybrid MTJ/CMOS integrated thermal sensor devices electrically coupled to said control unit;
wherein said control unit reads each of said hybrid MTJ/CMOS integrated thermal sensor devices to generate substantially in real-time, a thermal map of said IC, and
wherein said plurality of hybrid MTJ/CMOS integrated thermal sensor devices comprises one bit digital thermal sensors with a plurality of same or different settable threshold temperatures.
2. The distributed sensor network of claim 1 , wherein said plurality of hybrid MTJ/CMOS integrated thermal sensor devices comprises more than about 100 devices.
3. The distributed sensor network of claim 1 , further comprising a multiplexer circuit to switch a reference voltage between different voltages to vary said settable threshold temperature of said one bit digital thermal sensors.
4. The distributed sensor network of claim 1 , wherein said plurality of hybrid MTJ/CMOS integrated thermal sensor devices are configured in a grid based topology of m×n sensor nodes of m columns and n rows.
5. The distributed sensor network of claim 1 , wherein said thermal map comprises nodes below or above a threshold setting of each of said hybrid MTJ/CMOS integrated thermal sensor devices.
6. The distributed sensor network of claim 1 , wherein each of said plurality of hybrid MTJ/CMOS integrated thermal sensor devices is sequentially enabled and read by said control unit.
7. The distributed sensor network of claim 1 , wherein said control unit or a different control unit of said IC dynamically manages at least one system of said IC based on said thermal map to mitigate deterioration of a lifetime of said IC or a reliability of said IC.
8. The distributed sensor network of claim 1 , wherein said control unit, or a different control unit, dynamically configures substantially in real-time at least one logic module or at least one memory module of said IC based on said thermal map of said IC.
9. The distributed sensor network of claim 8 , wherein based on said thermal map, said control unit or said different control unit dynamically moves execution of a logic or an execution of a memory function from at least one module to a different similar function module of said IC dynamically in time to balance a thermal load between modules or to prevent an overheating of a module.
10. The distributed sensor network of claim 8 , wherein based on said thermal map, said control unit, or said different control unit, dynamically reconfigures said IC to optimize a thermal condition of said IC.