Always-on voltage references for IoT and BLE

Battery life of a wireless device is critical, as cost of replacing battery inside IoT device is substaintial and often impractical. Reducing power consumption in sleep mode and wake up the chip/SoC on a predetermined schedule reduces total power consmpution. That is because 99% of the time SoCs are sleeping only waiting to wake-up.
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This project is in collaboration with Nordic Semiconductor

Why would we need a always-on voltage reference?

With a ultra low-power voltage reference we could narrow the margins on supply rails, and we could further reduce the current used in power-on-reset circuits. If we could reduce the current sufficiently it would make a huge impact on the overall current consumption in sleep mode. For low-power applications the sleep current dominates the power budget, and by decreasing sleep currents we could extend battery life. Also, always-on voltage reference would reduce start-up time of the SoC, as it would not require additional time to start-up, when waking up from sleep.

The project could involve:
-investigate analog circuits based on published works
-analyse and evaluate design trade-offs
-design and simulate the circuit candidate in ADE
-potentialy implement the design
-Process node / technology to be agreed with academic co-supervisor.
Publisert 29. okt. 2020 12:18 - Sist endret 29. okt. 2020 12:18

Omfang (studiepoeng)