Delft University of Technology

Abstract A bipolar quad-output regulating rectifier for wireless power transfer (WPT) is presented. Using only five power switches, it provides four independently regulated bipolar outputs. A coil-reused DC-DC mode susta

Abstract A single-link wireless power and full-duplex data transfer system is presented. Operating at 40.68MHz, it delivers >50mW maximum output power with 61.1% peak end-to-end efficiency while supporting 17Mb/s uplink

*Equally Credited Authors (ECAs) 1 Abstract This work presents a battery-powered hybrid resonant pulse-train generator for ultrasonic wireless power transfer (US-WPT) in implantable medical devices. The ASIC integrates a

Abstract This paper presents an on-chip switched-capacitor converter, named piggybacked SC-onCSCR, featuring: 1) a power density of 5.67mW/mm2 enabled by eliminating high-voltage switches and jointly utilizing MOM and MO

Abstract This paper proposes an on-chip sigma regulation system for the accurate and power-efficient control of piezoelectric resonator (PR)-based DC-DC converters to address the challenges of conventional off-chip contr

Abstract This paper presents a thermoelectric energy harvesting (TEH) interface that realizes: 1) a multi-channel TEH for maximum power point tracking (MPPT) under uneven temperature conditions, improving efficiency by u

Abstract This work proposes a one-stage bidirectional rectifier with a pre-charge voltage (VPC) based perturb-and-observe (P&O) maximum power point tracking (MPPT) algorithm for triboelectric energy harvesting. The propo

Compared to its implant-based electrical counterpart, ultrasonic vagus nerve stimulation alters neuronal activity through mechanical ultrasound waves, emerging as a promising non-invasive therapy for managing drug-resist

Huazhong University of Science and Technology, Wuhan, China 1 2 *Equally Credited Authors (ECAs) The number of edge sensors for the Internet-of-Things (IoT) has been increasing dramatically every year to feed servers and

Fudan University, Shanghai, China 1 2 *Equally Credited Authors (ECAs) Along with the rise of the Internet of Things (IoT) and edge artificial intelligence (AI), energy harvesting provides a promising sustainable power s

patch are promising for next-generation health monitoring. They have the potential to enable impactful applications such as blood-pressure, cardiac, bladder, and respiratory monitoring. Research in this area to date has

With the advantages of flexibility and power density, triboelectric nanogenerators (TENGs) are promising in harvesting ambient mechanical energy via triboelectrification and electrostatic induction to power lower-power Int

The two key performance metrics of BJT-based temperature sensors are their accuracy and energy efficiency. Although NPN-based temperature sensors achieve the best energy efficiency [1], they have not been able to combine t

Wireless power transfer (WPT) shows extensive applications in sub-100mW batteryless biomedical implantable devices, where the robustness against variations in coupling and load conditions is still an unsolved and crucial

Goodix Technology, Nijmegen, The Netherlands 1 2 Class-D amplifiers (CDAs) are used in various audio applications thanks to their high power efficiency. However, they produce high-frequency switching energy that poses EMI

Synchronized bias-flip rectifiers, such as synchronized switch harvesting on inductor (SSHI) rectifiers, are widely used for piezoelectric energy harvesting (PEH) [1], which can replace the use of batteries in many IoT a

Silicon Integrated, Eindhoven, The Netherlands, 3Tsinghua University, Beijing, China *Equally-Credited Authors (ECAs) 1 2 CMOS frequency references based on RC oscillators are usually preferred over bulky crystals in IoT

now at Broadcom, Bunnik, The Netherlands 1 2 In chopper amplifiers, the interaction between the input signal and the chopper clock can cause intermodulation distortion (IMD). This is due to amplifier delay, which causes

temperature sensors are widely used due to their high accuracy over a wide temperature range with a low-cost 1-point trim. Although resistor-based sensors can achieve better energy efficiency, they typically require a 2-

Tsinghua University, Beijing, China 1 2 BJT-based temperature sensors are widely used because they can achieve excellent accuracy after 1-point calibration. However, they typically dissipate µWs of power and require supp

Each quadrature component is chopper demodulated and then integrated via Rs3 (=10M&) and Cfsp (=5pF) to generate a correction signal that is upmodulated and fed back to A4 via an auxiliary input stage. The offset of A4 i

Goodix Technology, Nijmegen, The Netherlands 1 2 Piezoelectric speakers are gaining popularity on account of their improving form-factor and audio quality, making them a good fit for many audio applications such as in te

imposed several challenges in the design of sub-6GHz receivers (RX). Firstly, the maximum channel bandwidth (2BW) increases to 100MHz, while a -15dBm continuous-wave (CW) blocker can be located only Δf=85MHz away from th

in the pharmaceutical, food, and semiconductor industries to measure small amounts (<1gram/hour) of liquids and gases. MEMS thermal flow sensors currently achieve state-of-the-art performance in terms of resolution, size

Resistor-based temperature sensors can achieve higher resolution and energy-efficiency than traditional BJT-based sensors. To reach similar accuracy, however, they typically require 2-point (2-pt) calibration, compared t

Yonsei University, Seoul, Korea 1 2 Microprocessors and SoCs employ multiple temperature sensors to prevent overheating and ensure reliable operation. Such sensors should be small (<10,000µm)) to monitor local hot-spots

low-frequency noise. However, the interaction between the input signal and the chopper clock can cause chopper-induced intermodulation distortion (IMD) [1-5]. This is especially problematic for input frequencies (Fin) ne

Recently, rapid strides have been made in improving the accuracy of RC-based frequency references [1-3]. Inaccuracies better than ±500ppm from -45°C to 85°C have been achieved, but typically at the expense of a costly an

The performance and robustness of millimeter-wave (mm-wave) phased-array transmitters (TXs) define, to a large extent, the quality of a high-data-rate 5G link. In practical situations, however, this TX performance is str

Energy efficiency and accuracy are important specifications of CMOS temperature sensors. BJT-based sensors achieve state-of-the-art accuracy [1], while Wheatstone-bridge (WhB) sensors achieve lower accuracy but state-of-

Systems-on-chip traditionally rely on bulky quartz crystals to comply with wired communication standards like CAN or USB 2.0. Integrated frequency references with better than 500ppm inaccuracy could meet this need, resul

systems (CTSs), several driving methods have been reported [1-5]. However, when excitation circuits simultaneously send excitation signals (VEXTs) to multiple TX electrodes in order to increase frame rate, the readout ci

generation is required for the control electronics of quantum computers. To avoid limiting the performance of quantum bits, the frequency noise of a PLL should be <1.9kHzrms [1]. However, it is challenging for RF oscilla

The readout of high-impedance sensors and sampled voltage references [1] requires amplifiers that can achieve both low offset and low input current. Recently, it has been shown that this unique combination can be achieved

Temperature sensors intended for embedded applications should be both energyand area-efficient. The combination of Wheatstone-bridge (WhB) sensors and continuous-time ADCs has proven to be highly energy efficient [1,2]. Ho

To comply with wired communication standards such as USB, SATA and PCI/PCIE, systems-on-chip require frequency references with better than 300ppm accuracy. LC-based references achieve 100ppm accuracy [1], but suffer from

The readout of high impedance sensors and sampled voltage references [1] requires amplifiers with both low offset and low input current. Chopper amplifiers can achieve low offset, but the switching of their input chopper

This paper presents a fully integrated ±4A current sensor that supports a 25V input common-mode voltage range (CMVR) while operating from a single 1.5V supply. It consists of an on-chip metal shunt, a beyond-the-rails AD

Temperature sensors based on Wheatstone bridges, e.g. [1,2], have recently achieved higher resolution and greater energy efficiency than conventional BJTbased sensors [3]. However, this comes at the expense of area, maki

Wheatstone bridge sensors are often used in precision instrumentation and measurement systems, e.g., for μK-resolution temperature sensing in wafer steppers [1] and mPa-resolution differential pressure sensing in precisi

This paper presents a BJT-based temperature sensor, which can be accurately trimmed in both ceramic and plastic packages, on the basis of purely electrical measurements at room temperature. This is achieved by combining

temperature compensation of frequency references [1-5]. High resolution and energy efficiency are then critical requirements, the former to minimize jitter and the latter to minimize power dissipation in a given conversi

stereo channels to achieve effective acoustic noise and echo cancellation, thus demanding ADCs with low power and minimal die area. Zoom-ADCs should be well suited for such applications, since they combine compact and en

Compact temperature sensors are widely used in SoCs to monitor on-chip temperature gradients and hot-spots, which are known to negatively impact reliability [1-4]. In this application, sensors must be able to accurately

CMOS Hall sensors are widely used as magnetic sensors due to their linearity and ease of integration [1-3]. Being essentially n-well resistors, their resolution is determined by thermal noise and so decreases with bandwi

input common-mode voltage range (CMVR) while powered from a single 5V supply. This beyond-the-rails capability is obtained by employing a capacitively coupled high-voltage (HV) chopper at the input of a switched-capacito

Temperature sensors are widely used in microprocessors to monitor on-chip temperature gradients and hot-spots, which are known to negatively impact reliability [1-4]. Such sensors should be: 1) Small to facilitate floor

Resonant sensors are a promising candidates for energy-constrained applications. For instance, the resonance frequency shift of polymer-coated MEMS resonators has been used to realize electronic nose systems for personal

The 1/f (flicker) noise upconversion degrades the close-in spectrum of CMOS RF oscillators. The resulting 1/f3 phase noise (PN) can be an issue in PLLs with a loop bandwidth of <1MHz, which practically implies all cellul

Since the invention of radio, superheterodyne has been the architecture of choice for receivers (RX). Thanks to its high intermediate-frequency (IF), the problems related to flicker noise, time-varying dc offsets, in-ban