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Oscillations in power electronic circuits with fast switching semiconductors are commonly known and the corresponding parasitic elements have been investigated in multiple literature. However, this paper investigates the triggering of these electromagnetic interference (EMI)-critical oscillations. An analytical description is derived using a boost converter circuit. Based on this description an optimization...
The analytical noise model of HgCdTe focal plane array (FPA) pixel based on capacitive transimpedance amplifier (CTIA) is presented. It allows to evaluate the noise-equivalent power (NEP) and input dynamic range (IDR) of short-wavelength infrared HgCdTe FPA. The noise model takes into account the following noise mechanisms: photodiode shot noise due to fluctuations of the radiation flux and dark current,...
Devices equipped by touch screens are nowadays widely diffused. One of the most meaningful factor which leads to this success is their easy and intuitive interface which allows a friendly user-device interaction. Touch shape recognition is a topic which has contributed to the realization of these types of interfaces. In this paper we propose a solution able to discriminate among different classes...
This paper investigates the power module design for better common-mode (CM) noise performance. A high frequency full-bridge diode rectifier is studied as an example. For this circuit, a comprehensive parametric study and a proposed CM equivalent model are first presented to identify the most influential factors in CM noise generation and mitigation. It is shown that proper parasitic value and parasitics...
Electric springs (ES) have been proposed as distributed devices for stabilizing the voltage and frequency of AC power systems. Similarly, its DC counterparts in the form of DC electric springs (DC-ES), which are connected in series with non-critical loads to form a smart load, can be applied for the voltage stabilization of DC grids. In this paper, configuration of series and shunt DC-ES and their...
Radiation induced soft errors are a serious concern not only for memories but also logic circuits. Amongst the several proposed countermeasures, Bulk Built-in Current Sensors represent a promising approach with fast response times and reasonable costs in terms of area and power. However, these circuits, as well as similar sensors that measure substrate effects, are strongly susceptible to substrate...
The total DDR on-die AC power delivery noise can be decomposed into high pass filtered (HPF) Vppa and low pass filtered (LPF) Vppb. PI-SI co-simulation reveals that Vppa impacts timing (eye width) and Vppb impacts signal voltage amplitude (eye height), and they need to be budgeted in different manner. Consequently the Power Delivery Network (PDN) is optimized with significant Cpkg and Cdie reduction...
This paper presents an open loop readout circuit technique for capacitive inertial sensors using a charge balanced and ratiometric approach. The charge balance is achieved through a delta-sigma loop allowing for direct analog-to-digital conversion at comparatively lower power. Techniques for achieving differential implementation, noise and offset cancellation are also discussed in lieu of the limitations...
Capacitance is very important in High Speed I/O power integrity network design. There are different form of capacitors being used on the High Speed I/O Power Integrity Network to ensure the performance of the circuit. In this paper, the effectiveness of MIM capacitance and MOS capacitance is compared. MIM capacitance comes in bulk quantity but placed further away from the HSIO circuits. While MOS...
This paper presents instrumentations for high throughput single ion channel recording array used for proteomics. The instrumentations incorporates two-stage amplifier using shared operational transconductance amplifier structure. The proposed sensor frontend reduces power consumption and area of circuit without any performance degradations in terms of bandwidth and noise. Two compact, low noise, low...
We developed high-speed III-V devices for millimeter-wave receiver applications as InP-based high electron mobility transistors (HEMTs) that had a cavity structure and zero-bias GaAsSb-based heterojunction backward diodes. A high cutoff frequency fT) of 517 GHz and minimum noise figure (NFmin) of 0.71 dB at 94 GHz were achieved for the InP-based HEMTs, even after the passivation process, by adopting...
A common mode EMI reduction technique of a flyback converter using a wire shield is presented. The capacitance model of the flyback transformer is derived and it is used to determine the values of the wire shield turns and compensation capacitor minimizing the noise voltage. The experimental results for an actual adaptor are provided to verify the effectiveness of the proposed method.
A comparison among different architectures of front-end preamplifiers for SiPM detectors is useful when relevant performance in terms of timing accuracy is required in single photon detection applications. Many different solutions have been proposed in the past, which can be grouped into three main approaches: charge sensitive amplifiers, voltage-mode amplifiers and current-mode buffers. Here these...
A high spatiotemporal resolution, wireline operation-based, in-vivo neural recording system is presented. The proposed system allows selecting 64 channels from 512 recording sites. The neural signals from the 64 selected sites are amplified, filtered, and finally multiplexed in the time domain. The output signals of each multiplexer are buffered, converted to the current domain, and then transferred...
The level of requirements for a readout front-end electronics dedicated for X-ray imaging applications, such as: high count rate ability of input pulses, low noise, low power dissipation and low silicon area occupation noise, is still increasing. The question: what one can do to minimize silicon area and keep front-end electronics analog parameters at a desirable level at the same time, is still important...
This paper presents multi-objective optimization of a front-end electronics implemented in multichannel integrated circuit for silicon sensors readout in the Silicon Tracking System in the CBM experiment at the FAIR center. We present the optimization towards low-power (< 8 mW/channel) and low-noise while keeping the channel pitch of 58 μm and minimum number of external components required for...
A novel pixel architecture is presented to be part of a pH-based DNA microarray using ISFETs as chemical sensors. The design, based on APS architectures, performs pulse width modulation to encode the pH in time. It allows compensation for a major ISFET nonideality, offset in the threshold voltage, which is caused by trapped charge on the floating gate and the passivation layer of the ISFET. Also,...
In this work we propose a measurement setup topology suitable for the automatic DC and low frequency noise (LFN) characterization of field effect transistors at wafer level. The system is composed of source and measure units (SMUs), by a custom-built low noise amplifier (LNA), and by a PC based spectrum analyzer. No bias filters and switch matrices are used, allowing fast switching between DC and...
This paper presents a design methodology for power optimized neural frontend interfaces (NFIs). The minimum power is analytically derived based on the constituent building blocks of the NFI, namely low noise amplifier, programmable gain amplifier and analog-to-digital converter (ADC), all of which are bound by noise. In the optimization process two types of ADC are considered: the successive approximation...
In this paper, a multi-core architecture suitable for digital back-end processing for medium size or large size mutual capacitance touch sensing systems is proposed. The proposed architecture achieves both high efficiency and flexibility by combining software on CPUs with dedicated circuits for heavy computation tasks, which can realize digital back-end for 10–100 inch touch sensors with the unified...
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