L. T. Manera

• State University of Campinas (UNICAMP)

In Industry 4.0, advanced systems for predicting maintenance of industrial electric motors are being developed. These systems use electronic sensors and wireless communication in low-power circuits. To enable selfsustaining devices and long-term monitoring strategies, energy harvesting techniques are employed. This paper describes a hybrid energy h...

In the era of the Fourth Industrial Revolution, improvements in maintenance routines for industrial electric motors are continuously being made, allowing for the development of Predictive Maintenance (PdM) Online. PdM can be executed by employing small embedded systems that are affixed to electrical machines. Although a small-capacity battery can e...

Predictive maintenance systems for industrial electric motors are being developed using electronic sensors and wireless communication systems incorporated into ultra-low consumption electronic circuits. If the electronic circuit is ultra-low consumption, a simple low-capacity rechargeable battery can power the system for years. However, the use of...

This paper improvies the traditional FOTA system to a more robust one named ANFUOTA. This technique is only applicable to systems without embedded operating systems and to microcontrollers without multiple flash memory bank. This novel system is capable of updating the firmware in an asynchronous mode via networks WSN/WSAN kind and furthermore, it...

PCB antennas present some excellent characteristics for low power communications, typically used in wireless sensor networks, such as low profile, low weight, compactness, durability, and versatility to suit several applications. However, these antennas tend to be chosen by the module manufacturer rather than the chips, and due to design constraint...

This work presents a method to assess the reliability of integrated inductors on a flexible substrate through a functional cyclic bending test, which consists of a full characterization of these inductors after several bending cycles. Inductors were fabricated through a simple and original technology suitable for use in the heterogeneous integratio...

This paper presents the complete design of a phase locked loop-based clock synthesizer for reconfigurable analog-to-digital converters. The synthesizer was implemented in TSMC 65 nm CMOS process technology and the presented results were obtained from extracted layout view with parasitics. The synthesizer generates clock frequencies ranging from 40...

Abstract This paper presents an Antipodal Vivaldi Antenna (AVA) design, focusing on its constructional aspects. The main features analysed are the connector attachment structure and the introduction of a polytetrafluoroethylene (PTFE) part that supports the antenna laminate. Issues related to dielectric penetration by milling tools are also address...

This paper presents the modeling and design of a reconfigurable ΣΔ modulator in Verilog-A language for applications in multi-standard wireless receivers. Main building blocks are implemented separately and its development detailed. Results presented are from simulations in SPECTRE circuit simulator in Cadence Virtuoso Analog Design Environment usin...

From its emergence to the present day, traffic light control systems have been widely used to monitor and control the flow of vehicles. However, with the increasing number of public (bus) and private vehicles (car, motorcycle, and truck), urban centers are becoming more and more populous. Such phenomenon leads to traffic congestion and increases en...

The Covid-19 pandemic posed new challenges to education. However, contrary to the scourge caused by the influenza virus in the 20th century, we currently have instruments and methodologies to minimize the negative impacts of the current situation. Thus, this work presents reflections on the various activities developed to keep teaching active, effi...

Self-aligned double (SADP) or quadruple (SAQP) patternings have been used to obtain sub-resolution lithographies (sub-10 nm). For this purpose, usually, these patternings are integrated with 193 nm immersion (193iL), extreme ultra-violet (EUVL) and electron beam (EBL) lithographies. In this work, SADPs are integrated with Ga⁺ Focused Ion Beam (FIB)...

The accelerated urbanization process can cause several traffic problems, such as congestion, environmental, and noise pollution. The system hardware developed consists of an actuator circuit, for the switching of AC/DC lamps and a sensor circuit, to check if the lamps are burnt out. The microcontroller’s firmware performs all the control logic, tim...

From its emergence to the present day, traffic light control systems has been widely used to monitor and control the flow of vehicles. However, with the increasing number of public (bus) and private vehicles (car, motorcycle, and truck), urban centers are becoming more and more populous. Such phenomenon leads to traffic congestion and increases env...

This paper presents a fabrication process for integrated inductors on a flexible substrate using a simple and cost effective method. Kapton was the choice for the substrate due to its attractive characteristics such as thermal stability and electrical insulation. Metal layers were formed by the deposition of a thin Ni film onto the substrate as a s...

The objective of this work is to explore the implementation of a low-cost real-time monitoring and control of water consumption together with a user feedback interface. Water usage information will be available in a cloud storage and can be accessed through a mobile application. The collected data allows access and supervision of both client- and w...

The constant increase in the number of vehicles, the lack of road traffic management and the technological limitations of traffic light control devices, contribute to increasing congestion, environmental and noise pollution. The applications involving the Internet of Things (IoT) concept have been growing around the world. Concerning the problems f...

This work describes the implementation and operation features for a Phase-Locked Loop (PLL) architecture-based frequency synthesizer for clock generation and digital systems driving. From a programmable structure, considering an input reference frequency FREF = 50 MHz, schematic level simulation results indicate the possibility for generation of 3...

This work deals with different types of residential energy monitoring methods, comparing their advantages and disadvantages. More specifically, this works focus on the relationship between these methods and the usage of state sensors devices. They are classified as: ILM (Intrusive Load Monitoring), where power information is acquired per household...

This work summarizes the operating features for type II second-order Phase-Locked Loop (PLL)-based Frequency Synthesizers (FS) from the set of equations of linear dynamic modeling for defining the corresponding block level and system level transfer functions and developing the reference design equations for the Low Pass Filter (LPF) components sizi...

Smart bus monitoring systems are used to provide real-time information about vehicles such as location, arrivals, average speed, journey time, and so on. These systems add values to the transportation service and bring benefits to both users and managers. This paper presents Circulino, an IoT solution for monitoring a University campus public trans...

In this study are analyzed horn antennas to operating at X band (8-12 GHz) and manufactured by additive manufacturing method (AM). To construct the antennas using AM method was necessary made the structure with acrylonitrile butadiene styrene (ABS) thermoplastic using a 3D printer, and then coated the antennas with conductive surfaces. Were fabrica...

O projeto envolve a colaboração do Laboratório de Soluções em Eletrônica e Rádiofrequência (LSERF) o qual visa o desenvolvimento de um instrumento embarcado capaz de medir as grandezas principais na análise científica da complexa cadeia do frio de logística no Brasil, com o intuito de monitorar as condições dos produtos transportados. Através de um...

O propósito desse trabalho foi a elaboração do projeto de um circuito que tornasse possível monitorar a posição geográfica do ônibus circular da Universidade Estadual de Campinas (Unicamp). O projeto se deu em várias etapas: elaboração do esquemático com o auxílio de um protoboard, elaboração do layout da placa de circuito impresso, contrução do pr...

Integrated circuit design is a very complex and time-consuming task, despite several SPICE-like simulator tools being used to improve productivity and reduce the expended time, make use of auxiliary tools is a must when trying to improve circuit performance and yield, as to get a much more robust design. This paper presents the design flow using a...

This work presents a general overview about the origin and manifestation of ionizing radiation-induced effects over CMOS technology-based semiconductor structures. From the characterization of radiation–matter interaction mechanisms and effects, this work summarizes the set of design strategies described in the literature for radiation hardened ele...

This paper presents the design of a compact-integrated reconfigurable rectenna array containing 2 × 2 compact microstrip patch antennas based on a fractal model with the rectifier circuit integrated into the same physical structure and usable in practical conditions. In this array configuration, four rectennas were mounted in a planar structure wit...

A presente invenção refere-se a um dispositivo e um método de bloqueio e intervenção de voo de veículos aéreos não tripulados controlados por radiofrequência (Drones ou VANTs). Mais precisamente, a presente invenção descreve um dispositivo capaz de identificar um drone invasor que sobrevoa uma área restrita e tomar o controle do mesmo, de modo a ca...

This work intends to develop electronic devices to solve real problems of monitoring transportable goods. The low-power mesh network end-devices containing sensors are used to measure environmental and physical properties, as temperature and humidity. Afterwards, radios send all the information to a coordinator module through Zigbee protocol and th...

A dual band vivaldi antenna was designed to operate at the frequencies of 2.4GHz and 5.8GHz, which are common frequencies used by drones' radiocontrollers. The project idea is to use this simulated antenna as an upgrade for a previously created spoofing module [1], that consists in a system responsible for identifying a drone's radiocontroller sign...

In this paper the optical and electrical characterization of a 75 × 75 µm2 uncooled bolometers based on free-standing La0.7Sr0.3MnO3 /CaTiO3 (LSMO/CTO) thin films fabricated by micromachining of the silicon substrates is presented. R(T) curves have been compared to electro thermal simulations. Its thermal conductance was measured to be 9 × 10−6 W·K...

This paper presents the design of a compact Antipodal Vivaldi Antenna (AVA) with good performance for ultra-wideband (UWB) applications. The miniaturized AVA - 40 x 40 x 0.8 mm, its balanced feed structure and its mechanical ground support are described in detail. The simulated results show that the proposed AVA covers a bandwidth ranging from 4.73...

This work summarizes the set of building and operating features for a third-order Charge Pump Phase-Locked Loop CP-PLL-based Frequency Synthesizer for clock generation. For implementation purpose, a derived architectural solution for N integer frequency division is proposed considering the particular design requirements in the PLL programmability....

Nowadays, with the technological evolution, the use of wireless identification devices is growing up. RFIDs tags are being used to track a product through an assembly line, packaged goods, animals and even humans. The system proposed on this paper intends to identify whether a passive tag goes in or out of the reader area. The device is composed by...

This paper evaluates and compares the development of Multi-Chip Module Deposited (MCM-D) technology using photosensitive benzocyclobutene (BCB) with the non-photosensitive BCB to fabricate passive devices. The polymer was used to isolate the metal/interconnection layers and also as the dielectric for the capacitors. Ni-P/Au was used as the conducto...

Drones have been used by criminals to smuggle cell phones and drugs into prisons. They also may cause accidents in airports and other heavy flight traffic zones, so it is clear that it is interesting to take control of drones in some specific situations. This work is part of a project intended to develop a system (hardware and software) to take con...

This paper summarizes an EDA (Electronic Design Automation) tools-based microelectronics training experience accomplished in the context of IC-Brazil Program. Representing a professional certification proposal in the fields of physics and engineering, the program involves two training phases and a final microelectronics project to be developed thro...

A novel method for fast and flexible fin field effect transistor (FinFET) prototyping using a Ga⁺focused ion beam is presented. The fin width and height control is explored, aiming for the successful fabrication of prototypes. This method results in fins with negligible Ga incorporation, when compared to traditional focused ion beam milling techniq...

Drones have been used by criminals to smuggle cell phones and drugs into prisons. They also may cause accidents in airports and other heavy flight traffic zones, so it is clear that is interesting to take control of drones in some specific situations. This work is part of a project intended to develop a system (hardware and software) to take contro...

This work describes the building and operating features concerning a charge pump phase-locked loop CP-PLL-based Frequency Synthesizer FS for clock generation and digital system driving. The system was developed at Cadence Analog Design Environment ADE by applying CMOS-based technology (UMCL180) and comprises the indicated operating features: - (1)...

Nikola Tesla, com suas interpretações inconvencionais da natureza, trouxe inúmeras inovações para o campo da engenharia, em especial na área de eletricidade. A análise da sua visão nos traz uma melhor compreensão de diversos tópicos da Engenharia Elétrica até então desconhecidos. Ao reproduzir um de seus experimentos, a Bobina de Tesla, podemos evi...

FinFET prototypes have been fabricated using an aluminium hard mask FIB milling technique for fin definition and SiON/TiN/Al gate stack. A three dimensional fin with sub-100nm dimensions was obtained. Electrical characterisation results are presented and discussed. Maximum transconductance in the linear region of 500nS, leakage current of 10pA and...

This paper summarizes an EDA (Electronic Design Automation) tools-based microelectronics training experience accomplished in the context of IC-Brazil Program. Representing a professional certification proposal in the fields of physics and engineering, the program involves two training phases and a final microelectronics project to be developed thro...

This paper summarizes the features and obtained results around and educational environment for microelectronics training implemented under the context of the growing trends of the semiconductors sector. By applying a design-based educational strategy for training and design skills acquisition about digital and analog design flow, the called IC-Braz...

This paper summarizes the features and obtained results around and educational environment for microelectronics training implemented under the context of the growing trends of the semiconductors sector. By applying a design-based educational strategy for training and design skills acquisition about digital and analog design flow, the called IC-Braz...

The accurate evaluation of electrical parameters like effective channel length and series resistance for 10 to 22nm FinFETs is very complex, although extremely important for the correct device modelling. Our paper reviews and applies to measured FinFETs various DC methods for the extraction of effective channel length and source/drain resistance. E...

This work presents a methodology for the simulation of bonding wires under the circumstance when signals with RF frequencies are employed and thus, the impedances of the parasitic resistances, capacitances and inductances of these interconnections are no longer negligible. A s-parameters extraction strategy for each of the wirebonds will be shown w...

The proposed device is a smart wireless sensor that can establish an auto-adaptive mesh network and concentrate all devices information in a data center. Each device has a current sensor, designed to identify whether a lamp is turned on or off. A microcontroller receives the sensor state and delivers it to a wireless module (NRF24L01), responsible...

This work describes an optimization tool-based design method for a Current Mode Logic CML divide-by-2 circuit embedded in a frequency synthesizer for RFID-protocol based transceiver implementation. Designed for driving multiple loads with asymmetric input capacitance to be driven at system level (through the PLL output frequency generation), the ci...

This paper evaluates the development of Multi-Chip Module Deposited (MCM-D) technology using photosensitive benzocyclobutene (BCB) to produce passive devices. The polymer was used as the dielectric and Ni-P/Au was used as the conductor film. The resistors' sheet resistance was measured with both TLM and direct measurement while the measurements of...

Silicon nitride films deposited by low-pressure electron cyclotron resonance plasma enhanced chemical vapor deposition (ECR-CVD) at room temperature are proposed for nonlinear optics applications in the telecommunications C-band. Numerical simulations were performed to determine the relationship between refractive index and the waveguide minimum si...

We present a Programmable Delay Control (PDC) for UWB Timed Array Radar Application, working with pulses in the GHz region, which requires a precise control of delays in the order of picoseconds. The major component of the PDC consists of a channel formed by two static inverters connected in series. Between the internal transition line (Vlinha) and...

This work presents the development of optically controlled reconfigurable antenna arrays. They are based on two patch elements with E-shaped slots, a printed probe, and a photoconductive switch made from an intrinsic silicon die. Numerical simulations and experiments have been shown to be in agreement, and both demonstrate that the frequency respon...

This paper presents the development and implementation of a wireless system for street lighting control and monitoring, focusing on its energy efficiency and reliability. Each node of the network consists of a lamp connected to an electronic dimmable ballast through a control unit and a radio module. The network is designed using the 802.15.4 IEEE...

This work describes the development of an optically controlled reconfigurable E-antenna for cognitive and adaptive radio communications systems at 2.4 and 5.8 GHz ISM bands. Numerical simulations and experiments demonstrate the antenna frequency response can be efficiently adapted in the optical domain over two different frequency bands.

Complimentary metal-oxide-semiconductor (CMOS) transistors with polycrystalline Si (poly-Si)/SiGe as the gate material are presented. The SiGe integration using a local CMOS process was developed. It uses a single n+-doped poly-Si0.7Ge0.3 gate instead of single n+- or double-doped poly-Si gate. After deposition, both the poly-Si and SiGe films used...

A reduction of gate depletion and DC characteristics in CMOS transistors with poly-Si/SiGe Gate stack fabricated with local CMOS process is presented. Our local CMOS process uses a single n+ doped, poly-Si/SiGe gate material. After deposition, both the poly-Si and the SiGe used as gate layers were implanted by phosphorus ions. The parameters on thr...

DC performance and Low Frequency Noise in p-MOS transistor with poly-Si/SiGe Gate fabricated with the CMOS process entirely developed in the Center for Semiconductor Components at UNICAMP is presented. After deposition, films of poly-Si and poly SiGe were implanted by phosphorus ions. The transistor has a channel region with silicon oxide thickness...

The characterization of an n-MOS transistor with poly-Si/SiGe Gate fabricated with the CMOS process entirely developed in the Center for Semiconductor Components (CCS) at UNICAMP is presented. The Gate layer was grown by vertical LPCVD at 800 {degree sign}C. The resultant transistor has a channel region with oxide thickness of 30 nm and self-aligne...

In this paper we have developed a passivation technique with silicon-nitride (SiNX) film that requires no surface pre-treatment, and is fully compatible to monolithic microwave integrated circuits (MMICs). The nitride depositions were carried out by ECR–CVD (electron cyclotron resonance–chemical vapor deposition) directly over InGaP/GaAs heterojunc...

A CMOS technology for educational activities and academic projects has been performed. The CMOS device fabrication process and electrical parameter simulations were obtained by ATHENA (from SILVACO) and PISCES software, respectively. So, CMOS devices, such as capacitors, transistors and inverters, were fabricated and their electrical parameters ext...

The development of new devices with micron and submicron dimensions requires an accurate photolithographic process steps control. The requirements are different for isolated and periodic/high-density structures. Characterization of a lithographic patterning process are presented, and the conditions of the process are optimized to obtain repetitive...

In this work we present the feasibility studies to fabricate a sensor of triple APS-CMOS junction, which captures the colors blue, green, and red without using filters. Process and electrical parameters are extracted by SUPREM, PISCES and PSPICE simulations. The device simulations in MATHEMATICA program show a good separability of the spectral resp...