IEEE Solid-States Circuits Magazine - Fall 2023 - 93

body-mounted base station and multiple
sensor nodes (Figure 12). When
power transmission and communication
are concurrently active, interference
from the power transmission
circuit on the base station saturates
the receiver circuit, thus mandating
a self-interference cancellation circuit
with a suppression performance
of more than 40 dB. The sensor node
circuit enables stable power reception
by separating the ground of the
power/data reception part and the
data transmission part.
In another highlight, KU Leuven
reported an electronic skin (e-skin)
taxel readout chip in a 0.18-μm CMOS
to achieve the highest reported spatial
resolution of 200 μm, comparable
to human fingertips. A key
innovation is the on-chip integration
of a 12 × 16 taxel array with a pertaxel
signal conditioning front end
and spiking readout combined with
embedded neuromorphic first-order
processing through complex receptive
fields. Compared to prior art,
this work achieved 100-7,000× reduction
in system power consumption
and more than five orders of magnitude
reduction in per-taxel power
consumption while enhancing the
spatial resolution by 5× and doubling
the sensor count. The spiking neural
network-based classification of the
chip's spatiotemporal spiking output
for input tactile stimuli, such as texture
and flutter frequency, achieved
excellent accuracies of up to 97.1%
and 99.2% of classification accuracy,
respectively. (See Figure 13).
In the area of neural interfaces, the
Universities of Toronto and Pennsylvania
and the University Health Network
of Canada reported a wireless
brain stimulation system capable
of guiding a rodent in a water maze
to the goal using real-time generated
brain stimulation. The system
was equipped with an FPGA-based
controlling host with a 160 × 160
image sensor and a wireless neural
interface device consisting of fully
implantable and wearable parts. The
host would track a rat in the water
maze and generate a stimulation pattern
for guidance. (See Figure 14).
FIGURE 12: Concept of concurrent power transmission and data communication via human
body using single electrode.
FIGURE 13: E-skin chip that mimics the tactile senses of human fingertips. The chip is mounted
on the palm and fingertips of robot hands.
FIGURE 14: Water maze sensor-brain interface system.
IEEE SOLID-STATE CIRCUITS MAGAZINE
FALL 2023
93

IEEE Solid-States Circuits Magazine - Fall 2023

Table of Contents for the Digital Edition of IEEE Solid-States Circuits Magazine - Fall 2023

Contents
IEEE Solid-States Circuits Magazine - Fall 2023 - Cover1
IEEE Solid-States Circuits Magazine - Fall 2023 - Cover2
IEEE Solid-States Circuits Magazine - Fall 2023 - Contents
IEEE Solid-States Circuits Magazine - Fall 2023 - 2
IEEE Solid-States Circuits Magazine - Fall 2023 - 3
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IEEE Solid-States Circuits Magazine - Fall 2023 - Cover3
IEEE Solid-States Circuits Magazine - Fall 2023 - Cover4
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2023
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2023
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https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2023
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https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2022
https://www.nxtbook.com/nxtbooks/ieee/mssc_spring2022
https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2022
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https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2021
https://www.nxtbook.com/nxtbooks/ieee/mssc_spring2021
https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2021
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https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_winter2014
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_fall2014
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