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CMOS SPAD imagers are potentially good candidates for detection of entangled photons in Quantum Imaging applications thanks to their sub-nanosecond time-resolved capabilities and highly parallel readout. In this context, the low number of photons that are typically detected corresponds to a very sparse data matrix. A full readout of raw data is therefore a waste of time and power. We have implemented...
The reduction of electromagnetic emissions (EME) in switch mode power supplies (SMPS) has high importance especially in automotive applications. The main methods to influence the switching behaviour of SMPS are external filters, spread spectrum techniques and the output driver circuits. This paper presents the concept and its implementation of an output driver with adaptive current source control...
Many drugs need to be injected frequently by the patient himself, e.g. insulin for diabetes treatment. Disposable injection pens comprise the most popular delivery devices for ease of use and discretion. However, these devices do not provide any tracking capability. In this paper we present a method to measure automatically the injected dose based on a capacitive measurement. A typical dose of e.g...
In this work we present a FPGA-based system for real-time processing of neural signals acquired by commercial high-density microelectrode array (HDMEA). The considered MEA features 4096 electrodes with 18kHz sampling frequency and 12-bit resolution, thus produces nearly 1 Gbps of data. Within the implementation, we considered low-latency as a main objective, to allow for closed-loop acquisition-stimulation...
A novel solution to high efficiency and high specific power three-phase Back to Back Power Converters has been proposed and theoretically investigated in this paper. Target applications are variable speed gen-sets, electric drives and independent power supplies. The solution proposed is based on a novel 5-Level E-Type topology. Advantages of the new solution, such as significant reduction of the input/output...
This works presents the design and test of a switching power supply intended for powering LED tail lights in automotive applications. The design is proposed as an alternative to an existing Boost reference design, and is based on a different step-up topology, the ZetaBoost, with the objective of reducing the output ripple, and therefore ease the compliance with automotive electromagnetic interference...
Silicon photomultipliers (SiPMs) are meant to substitute photomultiplier tubes in high-energy physics detectors and nuclear medicine. This is because of their —to name a few interesting properties— compactness, lower bias voltage, tolerance to magnetic fields and finer spatial resolution. SiPMs can also be built in CMOS technology. This allows the incorporation of active quenching and recharge schemes...
This paper presents the design of a temperature stable, supply independent current reference in a 0.25 μm CMOS technology. A current with small temperature coefficient is derived by exploiting the zero temperature coefficient (ZTC) operating point of a MOS transistor. The transistor is used in a feedback loop to cancel the temperature dependence of a polysilicon resistor. It is shown that simple equations...
In this paper, a technique aiming at enhancing the conversion speed of asynchronous high resolution SAR ADCs is presented. In conventional SAR ADCs, the capacitive DAC size is growing exponentially with the converter resolution. The settling time of the MSB capacitors get thus longer, limiting the total conversion speed. This method proposes to operate a small and fast 3-bit ADC in parallel with the...
In this paper a 600MHz 4th order low-pass analog filter in CMOS-28nm is presented. The transfer function is obtained with the cascade of two Active-RC Rauch biquadratic cells. Each cell is based on a novel OPAMP optimized for very high frequency operation achieving a Unity Gain Bandwidth (UGBW) > 7GHz. The developed three stage folded OPAMP exploits a feed-forward compensation technique to maximize...
Detectors in high energy physics (HEP) that are subject to high hit rates require fast and sophisticated instrumentation. The proposed Timing Vertex Detector (TVD) requires femtosecond resolution timing to determine the space-time coordinates of the traversing particles. One of its key components is the RFpix waveform digitizing ASIC, which is being designed to operate with an analog bandwidth of...
System level modeling is applied to a recently proposed indirect current feedback (ICF) chopper instrumentation amplifier based on a Gm-C low pass filter architecture. The aim of the study is solving important limitations of the previous architecture in terms of output range and bandwidth-to-chopper frequency ratio. The possibility of obtaining a rail-to-rail input common mode range is also investigated...
The work at hand illustrates the design approach adopted for a large strain sensor, based on the carbon nanotube (CNT) technology, devoted to operations of structural health monitoring and shape reconstruction. After a critical discussion on the specifications, the most suited materials and processes were selected, with specific focus on the dispersion and deposition strategies. Then, by means of...
In this paper, a voltage-scalable inverter-based operational amplifier suitable to be used in a reconfigurable ADC is optimized. A very low voltage sample-and-hold (SHA) circuit based on this opamp is presented to test the feasibility of a reconfigurable pipeline ADC. Simulations using STMicroelectronics 45-nm device models show that the opamp gain remains quite constant up to a supply voltage of...
Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
In this paper, a broadband, inductorless noise-canceling low-noise transconductance amplifier is presented. The proposed circuit is suitable for TV White-Space applications. It has a single-ended input, eliminating the need for an external balun, and a balanced output, which can be followed by a double-balanced current-switching mixer for high IIP2. The circuit is based on a common-gate stage with...
This paper presents a study on photodiodes dedicated to image sensors which merge imaging and harvesting capabilities. This study has led to a VerilogA model of photodiodes dependent on the properties of the CMOS process, photodiodes geometry and illumination. Such model will be useful to make predictions on the behavior of new architectures of photodiodes used in CMOS image sensors embedding harvesting...
Higher efficiency in photovoltaic (PV) conversion calls for the use of small Maximum Power Point Trackers (MPPT) to be placed on board the PV modules. Such circuits require in turn power transistors with low energy losses, high switching speed and blocking voltages lower than 150 V. Thus, starting from a conventional 4H-SiC power MOSFET, a novel device for photovoltaic applications has been designed...
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