Low-energy Wake-up Chip Activates IoT Sensors

Low-energy Wake-up Chip Activates IoT Sensors

November 12, 2019 | 22:17

A new, energy-efficient chip has been developed in the laboratories at the University of California San Diego which could significantly extend battery life in IoT sensor applications and mobile devices. A device using the wake-up receiver will only be activated when the receiver detects a specific signal (the wake-up signature) otherwise only the receiver section remains listening, consuming very little energy.

The technology is particularly suitable for applications that transfer data sporadically, such as IoT sensors monitoring non-critical signals or portable health monitors which only take measurements a few times a day. It’s often the case that devices in a network will waste energy by routinely powering up and synchronizing with the network even when there is no new data to send. Researchers were able to boost battery life from months to years for small IoT devices using the wake-up chip to switch the device.

The wake-up chip

The UCSD research team published their findings under the title “A 22.3 nW, 4.55 cm2 Temperature-Robust Wake-up Receiver Achieving a Sensitivity of -69.5 dBm at 9 GHz” in the IEEE Journal of Solid State Circuits. The receiver is an extremely energy-efficient chip (using just 22.3nW) to continuously look for a particular radio signal (the wake-up signature) to activate the main unit.

The wake-up signals operate at 9 GHz, within the microwave X band, which is also used for satellite communications, radar and wireless communications networks. The benefit of using such a short wavelength is that the antenna and associated components can all be contained in a relatively small package. The unit was specifically designed to operate over a wide (-10 to 40 ° C) temperature range to ensure its suitability for use in equipment designed for indoor and outdoor use.

To read full article, click here.

Back to news list >

When you navigate our site, some cookies may be stored in or retrieved from your browser. Such information may relate to you, your preferences or your device and is primarily used to ensure that the site is operating properly. This information cannot be used to identify you directly but may be used to enhance your web experience. Since we respect your privacy, we give you the opportunity not to allow these cookies.

Close Popup
Privacy Settings saved!
Privacy settings

As you navigate through our site, certain cookies may be stored in or retrieved from your browser. This information may relate to you, your preferences or your device and is primarily used to ensure that the site functions correctly. The information does not identify you directly, but may help you benefit from an enhanced Web experience. Because we respect your privacy, we give you the opportunity not to allow these cookies.


Google Analytics
We track anonymized user information to improve our website.
  • _ga
  • _gid
  • _gat

Decline
Save
Accept