A Sub-𝝁A Ultrasonic Wake-Up Trigger with Addressing Capability for Wireless Sensor Nodes

Table 1

Energy spent by the ultrasonic module for transmitting and receiving broadcast/unicast wake-ups.

Energy consumption
	Unicast	Broadcast
Transmitter	16.25 mJ	1.88 mJ
Receiver	3.75 𝜇J	0.75 𝜇J