IEEE Solid-States Circuits Magazine - Fall 2020 - 41

spectroscopy and the phosphorescence quenching of metalloporphyrins [48], [49]. The system consists
of a hydrogel sensor, a pen injector,
a console, and a spotlight reader
(Figure 10). The sensor implanted in
the subcutaneous tissue consists of
soft hydrogel with dimensions of 0.5
× 0.5 × 0.5 mm. The sensor is biocompatible and suitable to remain
permanently in the body. The pen
is a sterile, single-use, disposable
injector to place the hydrogel at an
approximate depth of 2-6 mm from
the surface of the skin. A handheld
device is placed on the skin over the
implanted hydrogel. The spotlight in
this instrument uses optical signals
to communicate with the sensor to
receive the O2 data. The data from
the O2 are transmitted to the console
for postprocessing and analysis.

tion channel. The data transmission is performed by the amplitude
modulation of the ultrasound backscattering, which is then received by

the external piezo during the receive
mode after two times of flight following the transmission. The received signal is filtered, -demodulated, amplified,

LED Driver

Timing Control

Digital TIA

Integration

Ambient Cancellation

Digital TIA
Resistive DAC
VREF

Linearized
by DEM

RDAC

Implantable Deep-Tissue O2 Monitor

A fully wireless, implantable, real-time
deep-tissue O2 monitoring system is
presented in [21]. The monitor operates using a single ultrasound link for
both the uplink/downlink data transmission and power. A high-voltage
driver excites an external piezo,
sending ultrasound pulses into the
tissue when the system is in transmit mode. These pulses arrive after
one time of flight. The monitor uses
these pulses for powering up the
system and creating a communica-

-
I=

+

VREF
RDAC

INT

Gin-band

N-Bit
ADC

Digital
Signal
Process

DOUT

Oversampling
(SAR ADC)

FIGURE 8: The architecture of the Mediatek PPG FE with a digital TIA. Adapted from [47].
DEM: dynamic element matching; SAR: successive approximation register.

Inst.
Amp
Electrode

Antialiasing
Filter

Data
Electrode

ADC
ADC
Temp.

LED
Driver

IR
PD
RED

Trans
Z Amp

NFC
ISO 15693
Reader

CPU

GPIO

Circular
Buffer
NFC
ISO
15693
Interface

BLE Host
Interface
Power

FIGURE 9: A system diagram of Northwestern University's medical sensor system. Adapted from [20]. ISO: International Organization for
Standardization. Inst: instrumentation; IR: infrared; Temp.: temperature; Trans Z: transimpedance; Amp: amplifier; GPIO: general purpose
input/output.

IEEE SOLID-STATE CIRCUITS MAGAZINE

FA L L 2 0 2 0

41

IEEE Solid-States Circuits Magazine - Fall 2020

Table of Contents for the Digital Edition of IEEE Solid-States Circuits Magazine - Fall 2020

Contents
IEEE Solid-States Circuits Magazine - Fall 2020 - Cover1
IEEE Solid-States Circuits Magazine - Fall 2020 - Cover2
IEEE Solid-States Circuits Magazine - Fall 2020 - Contents
IEEE Solid-States Circuits Magazine - Fall 2020 - 2
IEEE Solid-States Circuits Magazine - Fall 2020 - 3
IEEE Solid-States Circuits Magazine - Fall 2020 - 4
IEEE Solid-States Circuits Magazine - Fall 2020 - 5
IEEE Solid-States Circuits Magazine - Fall 2020 - 6
IEEE Solid-States Circuits Magazine - Fall 2020 - 7
IEEE Solid-States Circuits Magazine - Fall 2020 - 8
IEEE Solid-States Circuits Magazine - Fall 2020 - 9
IEEE Solid-States Circuits Magazine - Fall 2020 - 10
IEEE Solid-States Circuits Magazine - Fall 2020 - 11
IEEE Solid-States Circuits Magazine - Fall 2020 - 12
IEEE Solid-States Circuits Magazine - Fall 2020 - 13
IEEE Solid-States Circuits Magazine - Fall 2020 - 14
IEEE Solid-States Circuits Magazine - Fall 2020 - 15
IEEE Solid-States Circuits Magazine - Fall 2020 - 16
IEEE Solid-States Circuits Magazine - Fall 2020 - 17
IEEE Solid-States Circuits Magazine - Fall 2020 - 18
IEEE Solid-States Circuits Magazine - Fall 2020 - 19
IEEE Solid-States Circuits Magazine - Fall 2020 - 20
IEEE Solid-States Circuits Magazine - Fall 2020 - 21
IEEE Solid-States Circuits Magazine - Fall 2020 - 22
IEEE Solid-States Circuits Magazine - Fall 2020 - 23
IEEE Solid-States Circuits Magazine - Fall 2020 - 24
IEEE Solid-States Circuits Magazine - Fall 2020 - 25
IEEE Solid-States Circuits Magazine - Fall 2020 - 26
IEEE Solid-States Circuits Magazine - Fall 2020 - 27
IEEE Solid-States Circuits Magazine - Fall 2020 - 28
IEEE Solid-States Circuits Magazine - Fall 2020 - 29
IEEE Solid-States Circuits Magazine - Fall 2020 - 30
IEEE Solid-States Circuits Magazine - Fall 2020 - 31
IEEE Solid-States Circuits Magazine - Fall 2020 - 32
IEEE Solid-States Circuits Magazine - Fall 2020 - 33
IEEE Solid-States Circuits Magazine - Fall 2020 - 34
IEEE Solid-States Circuits Magazine - Fall 2020 - 35
IEEE Solid-States Circuits Magazine - Fall 2020 - 36
IEEE Solid-States Circuits Magazine - Fall 2020 - 37
IEEE Solid-States Circuits Magazine - Fall 2020 - 38
IEEE Solid-States Circuits Magazine - Fall 2020 - 39
IEEE Solid-States Circuits Magazine - Fall 2020 - 40
IEEE Solid-States Circuits Magazine - Fall 2020 - 41
IEEE Solid-States Circuits Magazine - Fall 2020 - 42
IEEE Solid-States Circuits Magazine - Fall 2020 - 43
IEEE Solid-States Circuits Magazine - Fall 2020 - 44
IEEE Solid-States Circuits Magazine - Fall 2020 - 45
IEEE Solid-States Circuits Magazine - Fall 2020 - 46
IEEE Solid-States Circuits Magazine - Fall 2020 - 47
IEEE Solid-States Circuits Magazine - Fall 2020 - 48
IEEE Solid-States Circuits Magazine - Fall 2020 - 49
IEEE Solid-States Circuits Magazine - Fall 2020 - 50
IEEE Solid-States Circuits Magazine - Fall 2020 - 51
IEEE Solid-States Circuits Magazine - Fall 2020 - 52
IEEE Solid-States Circuits Magazine - Fall 2020 - 53
IEEE Solid-States Circuits Magazine - Fall 2020 - 54
IEEE Solid-States Circuits Magazine - Fall 2020 - 55
IEEE Solid-States Circuits Magazine - Fall 2020 - 56
IEEE Solid-States Circuits Magazine - Fall 2020 - 57
IEEE Solid-States Circuits Magazine - Fall 2020 - 58
IEEE Solid-States Circuits Magazine - Fall 2020 - 59
IEEE Solid-States Circuits Magazine - Fall 2020 - 60
IEEE Solid-States Circuits Magazine - Fall 2020 - 61
IEEE Solid-States Circuits Magazine - Fall 2020 - 62
IEEE Solid-States Circuits Magazine - Fall 2020 - 63
IEEE Solid-States Circuits Magazine - Fall 2020 - 64
IEEE Solid-States Circuits Magazine - Fall 2020 - 65
IEEE Solid-States Circuits Magazine - Fall 2020 - 66
IEEE Solid-States Circuits Magazine - Fall 2020 - 67
IEEE Solid-States Circuits Magazine - Fall 2020 - 68
IEEE Solid-States Circuits Magazine - Fall 2020 - 69
IEEE Solid-States Circuits Magazine - Fall 2020 - 70
IEEE Solid-States Circuits Magazine - Fall 2020 - 71
IEEE Solid-States Circuits Magazine - Fall 2020 - 72
IEEE Solid-States Circuits Magazine - Fall 2020 - 73
IEEE Solid-States Circuits Magazine - Fall 2020 - 74
IEEE Solid-States Circuits Magazine - Fall 2020 - 75
IEEE Solid-States Circuits Magazine - Fall 2020 - 76
IEEE Solid-States Circuits Magazine - Fall 2020 - 77
IEEE Solid-States Circuits Magazine - Fall 2020 - 78
IEEE Solid-States Circuits Magazine - Fall 2020 - 79
IEEE Solid-States Circuits Magazine - Fall 2020 - 80
IEEE Solid-States Circuits Magazine - Fall 2020 - 81
IEEE Solid-States Circuits Magazine - Fall 2020 - 82
IEEE Solid-States Circuits Magazine - Fall 2020 - 83
IEEE Solid-States Circuits Magazine - Fall 2020 - 84
IEEE Solid-States Circuits Magazine - Fall 2020 - 85
IEEE Solid-States Circuits Magazine - Fall 2020 - 86
IEEE Solid-States Circuits Magazine - Fall 2020 - 87
IEEE Solid-States Circuits Magazine - Fall 2020 - 88
IEEE Solid-States Circuits Magazine - Fall 2020 - 89
IEEE Solid-States Circuits Magazine - Fall 2020 - 90
IEEE Solid-States Circuits Magazine - Fall 2020 - 91
IEEE Solid-States Circuits Magazine - Fall 2020 - 92
IEEE Solid-States Circuits Magazine - Fall 2020 - 93
IEEE Solid-States Circuits Magazine - Fall 2020 - 94
IEEE Solid-States Circuits Magazine - Fall 2020 - 95
IEEE Solid-States Circuits Magazine - Fall 2020 - 96
IEEE Solid-States Circuits Magazine - Fall 2020 - 97
IEEE Solid-States Circuits Magazine - Fall 2020 - 98
IEEE Solid-States Circuits Magazine - Fall 2020 - 99
IEEE Solid-States Circuits Magazine - Fall 2020 - 100
IEEE Solid-States Circuits Magazine - Fall 2020 - 101
IEEE Solid-States Circuits Magazine - Fall 2020 - 102
IEEE Solid-States Circuits Magazine - Fall 2020 - 103
IEEE Solid-States Circuits Magazine - Fall 2020 - 104
IEEE Solid-States Circuits Magazine - Fall 2020 - 105
IEEE Solid-States Circuits Magazine - Fall 2020 - 106
IEEE Solid-States Circuits Magazine - Fall 2020 - 107
IEEE Solid-States Circuits Magazine - Fall 2020 - 108
IEEE Solid-States Circuits Magazine - Fall 2020 - 109
IEEE Solid-States Circuits Magazine - Fall 2020 - 110
IEEE Solid-States Circuits Magazine - Fall 2020 - 111
IEEE Solid-States Circuits Magazine - Fall 2020 - 112
IEEE Solid-States Circuits Magazine - Fall 2020 - 113
IEEE Solid-States Circuits Magazine - Fall 2020 - 114
IEEE Solid-States Circuits Magazine - Fall 2020 - 115
IEEE Solid-States Circuits Magazine - Fall 2020 - 116
IEEE Solid-States Circuits Magazine - Fall 2020 - 117
IEEE Solid-States Circuits Magazine - Fall 2020 - 118
IEEE Solid-States Circuits Magazine - Fall 2020 - 119
IEEE Solid-States Circuits Magazine - Fall 2020 - 120
IEEE Solid-States Circuits Magazine - Fall 2020 - 121
IEEE Solid-States Circuits Magazine - Fall 2020 - 122
IEEE Solid-States Circuits Magazine - Fall 2020 - 123
IEEE Solid-States Circuits Magazine - Fall 2020 - 124
IEEE Solid-States Circuits Magazine - Fall 2020 - 125
IEEE Solid-States Circuits Magazine - Fall 2020 - 126
IEEE Solid-States Circuits Magazine - Fall 2020 - 127
IEEE Solid-States Circuits Magazine - Fall 2020 - 128
IEEE Solid-States Circuits Magazine - Fall 2020 - Cover3
IEEE Solid-States Circuits Magazine - Fall 2020 - Cover4
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2023
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2023
https://www.nxtbook.com/nxtbooks/ieee/mssc_spring2023
https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2023
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2022
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2022
https://www.nxtbook.com/nxtbooks/ieee/mssc_spring2022
https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2022
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2021
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2021
https://www.nxtbook.com/nxtbooks/ieee/mssc_spring2021
https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2021
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2020
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2020
https://www.nxtbook.com/nxtbooks/ieee/mssc_spring2020
https://www.nxtbook.com/nxtbooks/ieee/mssc_winter2020
https://www.nxtbook.com/nxtbooks/ieee/mssc_fall2019
https://www.nxtbook.com/nxtbooks/ieee/mssc_summer2019
https://www.nxtbook.com/nxtbooks/ieee/mssc_2019summer
https://www.nxtbook.com/nxtbooks/ieee/mssc_2019winter
https://www.nxtbook.com/nxtbooks/ieee/mssc_2018fall
https://www.nxtbook.com/nxtbooks/ieee/mssc_2018summer
https://www.nxtbook.com/nxtbooks/ieee/mssc_2018spring
https://www.nxtbook.com/nxtbooks/ieee/mssc_2018winter
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_winter2017
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_fall2017
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_summer2017
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_spring2017
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_winter2016
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_fall2016
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_summer2016
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_spring2016
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_winter2015
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_fall2015
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_summer2015
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_spring2015
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_winter2014
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_fall2014
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_summer2014
https://www.nxtbook.com/nxtbooks/ieee/solidstatecircuits_spring2014
https://www.nxtbookmedia.com