Pages
- 1
- 2
- document
-
Pan, S. (author), An, Xiaomeng (author), Yu, Zheru (author), Jiang, H. (author), Makinwa, K.A.A. (author)This article presents the design and implementation of a compact CMOS RC frequency reference. It consists of a frequency-locked loop (FLL) that locks the period of a voltage-controlled oscillator (VCO) to the time an RC network takes to charge to a reference voltage. Conventionally, an RC time constant with a near-zero temperature coefficient...journal article 2023
- document
-
Xun, H. (author), Yuan, S. (author), Fieback, M. (author), Taouil, M. (author), Hamdioui, S. (author), Aziza, Hassen (author)Many companies are heavily investing in the commercialization of Resistive Random Access Memories (RRAMs). This calls for a comprehensive understanding of manufacturing defects to develop efficient and high-quality test and diagnosis solutions to push high-volume production. This paper identifies and characterizes a new defect based on silicon...conference paper 2023
- document
-
Eland, E.N. (author), Mehrotra, Shubham (author), Karmakar, S. (author), van Veldhoven, Robert (author), Makinwa, K.A.A. (author)Zoom ADCs combine a coarse SAR ADC with a fine delta-sigma modulator (?SM) to efficiently obtain high energy efficiency and high dynamic range. This makes them well suited for use in various instrumentation and audio applications. However, zoom ADCs also have drawbacks. The use of over-ranging in their fine modulators may limit SNDR, large...book chapter 2023
- document
-
Wu, L. (author), Rao, Siddharth (author), Taouil, M. (author), Marinissen, Erik Jan (author), Kar, Gouri Sankar (author), Hamdioui, S. (author)The manufacturing process of STT-MRAM requires unique steps to fabricate and integrate magnetic tunnel junction (MTJ) devices which are data-storing elements. Thus, understanding the defects in MTJs and their faulty behaviors are paramount for developing high-quality test solutions. This article applies the advanced device-aware test to...journal article 2022
- document
-
Brito Zamparette, R.L. (author), Makinwa, K.A.A. (author)This letter presents a low-power, fully integrated current sensor for Coulomb-counting. It employs a hybrid delta–sigma modulator ( ΔΣM ) with an FIR-DAC to digitize the voltage drop across a shunt. The modulator’s first stage consists of a capacitively coupled chopper amplifier, which enables a beyond-the-rails (−0.3 to 5 V) input common...journal article 2022
- document
-
Gürleyük, C. (author), Pan, S. (author), Makinwa, K.A.A. (author)This article presents a 16-MHz RC frequency reference implemented in a standard 180-nm CMOS process. It consists of a frequency-locked loop (FLL) in which the output frequency of a digitally controlled oscillator (DCO) is locked to the frequency-phase characteristic of a Wien bridge RC filter. Since it is made from on-chip resistors and...journal article 2022
- document
-
Karmakar, S. (author), Berkhout, Marco (author), Makinwa, K.A.A. (author), Fan, Q. (author)This article presents a Class-D audio amplifier for capacitive piezoelectric speaker loads. Employing a dual voltage feedback (VFB)/current feedback (CFB) topology, the amplifier is capable of damping LC resonance without using an external damping resistor, therefore reducing system power consumption, cost, and size. Additional power savings are...journal article 2022
- document
-
Pan, S. (author)This thesis describes the design and implementation of integrated temperature sensors based on the temperature dependency of CMOS resistors.doctoral thesis 2021
- document
-
Pan, S. (author), Angevare, J. (author), Makinwa, K.A.A. (author)This article describes a hybrid temperature sensor in which an accurate, but energy-inefficient, thermal diffusivity (TD) sensor is used to calibrate an inaccurate, but efficient, resistor-based sensor. The latter is based on silicided polysilicon resistors embedded in a Wien-bridge (WB) filter, while the former is based on an electrothermal...journal article 2021
- document
-
Zhuo, M. (author), Grazioli, D. (author), Simone, A. (author)This study presents a three-dimensional computational model to evaluate effective conductivity and capacity of fiber-based battery electrodes. We employ electrodes composed of conductive and active material nanofibers dispersed in an electrolyte matrix. The effective conductivity is calculated by means of an equivalent resistor network model,...journal article 2020
- document
-
Lee, Yongtae (author), Choi, Woojun (author), Kim, Taewoong (author), Song, Seungwoo (author), Makinwa, K.A.A. (author), Chae, Youngcheol (author)This letter describes a compact resistor-based temperature sensor intended for the thermal monitoring of microprocessors and DRAMs. It consists of an RC poly phase filter (PPF) that is read out by a frequency-locked loop (FLL) based on a dual zero-crossing (ZC) detection scheme. The sensor,fabricated in 65-nm CMOS,occupies 5800 μm<sup>2</sup>...conference paper 2019
- document
-
Lee, Yongtae (author), Choi, Woojun (author), Kim, Taewoong (author), Song, Seungwoo (author), Makinwa, K.A.A. (author), Chae, Youngcheol (author)This letter describes a compact resistor-based temperature sensor intended for the thermal monitoring of microprocessors and DRAMs. It consists of an RC poly phase filter (PPF) that is read out by a frequency-locked loop (FLL) based on a dual zero-crossing (ZC) detection scheme. The sensor, fabricated in 65-nm CMOS, occupies 5800 μ m2 and...journal article 2019
- document
-
Pan, S. (author), Gürleyük, C. (author), Pimenta, Matheus F. (author), Makinwa, K.A.A. (author)Resistor-based temperature sensors can achieve much higher resolution and energy efficiency than conventional BJT-based sensors [1], but they typically occupy more area (> 0.25 mm <sup>2</sup> ) and have lower operating temperatures (le 125 {circ} {C}) [2]-[4]. This work describes a 0.12mm <sup>2</sup> resistor-based sensor that uses a...conference paper 2019
- document
-
A ± 12-A High-Side Current Sensor With 25 V Input CM Range and 0.35% Gain Error From −40 °C to 85 °CXu, L. (author), Heidary Shalmany, S. (author), Huijsing, J.H. (author), Makinwa, K.A.A. (author)This letter presents the most accurate shunt-based high-side current sensor ever reported. It achieves a 25 V input common-mode range from a single 1.8-V supply by using a beyond-the-rails ADC. A hybrid analog/digital temperature compensation scheme is proposed to simplify the circuit implementation while maintaining the state-of-the-art...journal article 2018
- document
-
Pan, S. (author), Luo, Yanquan (author), Heidary Shalmany, S. (author), Makinwa, K.A.A. (author)This paper describes a high-resolution energy-efficient CMOS temperature sensor, intended for the temperature compensation of MEMS/quartz frequency references. The sensor is based on silicided poly-silicon thermistors, which are embedded in a Wien-bridge RC filter. When driven at a fixed frequency, the filter exhibits a temperature-dependent...journal article 2018
- document
-
Pan, S. (author), Makinwa, K.A.A. (author)Temperature sensors based on Wheatstone bridges, e.g. [1,2], have recently achieved higher resolution and greater energy efficiency than conventional BJT-based sensors [3]. However, this comes at the expense of area, making them less attractive in industrial applications. This paper presents a Wheatstone-bridge sensor that uses a zoom-ADC...conference paper 2018
- document
-
Choi, Woojun (author), Lee, Yongtae (author), Kim, Seonhong (author), Lee, Sanghoon (author), Jang, Jieun (author), Chun, Junhyun (author), Makinwa, K.A.A. (author), Chae, Youngcheol (author)This paper presents a compact resistor-based CMOS temperature sensor intended for dense thermal monitoring. It is based on an RC poly-phase filter (PPF), whose temperature-dependent phase shift is read out by a frequency-locked loop (FLL). The PPF's phase shift is determined by a zero-crossing (ZC) detector, allowing the rest of the FLL to be...journal article 2018
- document
-
Gürleyük, C. (author), Pedala', L. (author), Sebastiano, F. (author), Makinwa, K.A.A. (author)To comply with wired communication standards such as USB, SATA and PCI/PCI-E, systems-on-chip require frequency references with better than 300ppm accuracy. LC-based references achieve 100ppm accuracy [1], but suffer from high power consumption (∼20mW). Thermal diffusivity (TD) references require less power (∼2mW), at the expense of less...conference paper 2018
- document
-
Xu, L. (author), Huijsing, J.H. (author), Makinwa, K.A.A. (author)This paper presents a fully integrated shunt-based current sensor that supports a 25-V input common-mode range while operating from a single 1.5-V supply. It uses a highvoltage beyond-the-rails ADC to directly digitize the voltage across an on-chip shunt resistor. To compensate for the shunt’s large temperature coefficient of resistance (∼0.335%...journal article 2018
- document
-
Pan, S. (author), Luo, Yanquan (author), Heidary Shalmany, S. (author), Makinwa, K.A.A. (author)Temperature sensors are often used for the 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 conversion time. A MEMS-resonator-based sensor meets both criteria [1], but requires two...conference paper 2017
Pages
- 1
- 2