scholarly journals Real Time Digital Filter for a Front-End Electronics in Dark Matter and Neutrino Measurements

2020 ◽  
Author(s):  
Alejandro D. Martinez R. ◽  
On behalf of DarkSide Collaboration
Keyword(s):  
Dark Matter ◽  
Real Time ◽  
Digital Filter ◽  
Signal To Noise Ratio ◽  
Digital Signal ◽  
Pulse Shaper ◽  
Signal Processing Algorithm ◽  
Front End ◽  
Photo Detection ◽  
On Chip

This paper presents real-time digital filter algorithms to be applied within dark matter and neutrino measurements. The digital signal processing algorithm implements a trapezoidal pulse-shaper programmed on FPGA at 125 MHz. The real-time filter algorithm enhances the SNR of a digitized signal from a photo detection module (SiPM, cryogenic front-end electronics & 14-bits ADC). The trapezoidal filter upgrades the signal to noise ratio (SNR) from 10.4 to 15.4 with a total increment of 50%. The total on-chip power is 0.198 W.

Virtual Gain for Audio Windows

1998 ◽  
Vol 7 (1) ◽  
pp. 53-66 ◽  
Author(s):  
Michael Cohen ◽  
Nobuo Koizumi
Keyword(s):  
User Interface ◽  
Real Time ◽  
Digital Signal Processor ◽  
Digital Signal ◽  
Mutual Distance ◽  
Front End ◽  
Spatial Sound ◽  
Gain Adjustment ◽  
Audio System ◽  
Signal Processor

Audio windowing is a front-end, or user interface, to an audio system with a real-time spatial sound back end. Complementing directionalization by a digital signal processor (DSP), gain adjustment is used to control the volume of the various mixels ([sound] mixing elements). Virtual gain can be synthesized from components derived from collective iconic size, mutual distance, orientation and directivity, and selectively enabled according to room-wise partitioning of sources across sinks. This paper describes a derivation of virtual gain, and outlines the deployment of these expressions in an audio windowing system.

scholarly journals Dedicated front-end and readout electronics developments for real time 3D directional detection of dark matter with MIMAC

2012 ◽  
Vol 53 ◽  
pp. 129-136 ◽  
Author(s):  
O. Bourrion ◽  
G. Bosson ◽  
C. Grignon ◽  
J.P. Richer ◽  
O. Guillaudin ◽  
...  
Keyword(s):  
Dark Matter ◽  
Real Time ◽  
Readout Electronics ◽  
Front End ◽  
Directional Detection

scholarly journals Fully On-Chip Integrated Photodetector Front-End Dedicated to Real-Time Portable Optical Brain Imaging

2012 ◽  
Vol 02 (04) ◽  
pp. 300-313 ◽  
Author(s):  
Ehsan Kamrani ◽  
Frederic Lesage ◽  
Mohamad Sawan
Keyword(s):  
Brain Imaging ◽  
Real Time ◽  
Front End ◽  
On Chip

Acoustic Beamforming Enhancement of Locomotive Cabin Speech

2007 ◽  
Author(s):  
Karl Muecke ◽  
Steve C. Southward
Keyword(s):  
Negative Impact ◽  
Experimental Testing ◽  
Signal To Noise Ratio ◽  
Low Cost ◽  
Digital Signal ◽  
Detection Methods ◽  
Speech Signals ◽  
Signal Processing Algorithm ◽  
Directional Microphone ◽  
Spatially Distributed

The noisy and monotonous environment of a locomotive cabin is certainly not conducive to clear communication or to high levels of crew alertness. Both of these problems have a negative impact on the operational safety of the locomotive. In this paper, an acoustic beamforming system is developed and evaluated for enhancing the speech signals measured in a locomotive cabin. Higher signal-to-noise ratio (SNR) speech signals can significantly improve communication as well as enable the use of speech-based alertness detection methods. Acoustic beamforming utilizes a spatially distributed array of low-cost microphones permanently mounted in the locomotive cabin trim, with a digital signal processing algorithm to effectively create a focused directional microphone which can be pointed at any crew member in the cabin. Preliminary experimental testing of this system in a green truck cabin has been successful, even with very high levels of noise.

Digital-Filter-Based Compensation of Case Effect in Sound-Level Meters

2010 ◽  
Vol 56 (3) ◽  
pp. 263-266
Author(s):  
Andrzej Miękina ◽  
Andrzej Podgórski
Keyword(s):  
Digital Filter ◽  
Digital Signal Processor ◽  
Finite Impulse Response ◽  
Digital Signal ◽  
Sound Level ◽  
Remez Algorithm ◽  
The Family ◽  
On Chip ◽  
Level Meter ◽  
Case Effect

Digital-Filter-Based Compensation of Case Effect in Sound-Level Meters The methodology for the design of a digital filter, which should compensate the effect of reflections and diffraction from the sound-level meter's casing (the so-called case effect), is presented. The coefficients of the family of the finite impulse response (FIR) filters, which were selected to fulfill the requirements of the compensation, were obtained in the MATLAB environment using the Remez algorithm. The frequency response of the selected designed filter are given. The chosen FIR filter was implemented in an on-chip Enhanced Filter Coprocessor of a fixed point 24-bit digital signal processor of a sound-level meter.

45. Education at distance: Broadcasting ECG rounds to Southeastern Ontario (BESO Project). An innovative approach for teaching electrocardiography

2007 ◽  
Vol 30 (4) ◽  
pp. 51 ◽  
Author(s):  
A. Baranchuk ◽  
G. Dagnone ◽  
P. Fowler ◽  
M. N. Harrison ◽  
L. Lisnevskaia ◽  
...  
Keyword(s):  
Health Care ◽  
Real Time ◽  
Digital Signal ◽  
Teaching Methodology ◽  
Care Providers ◽  
Long Distance ◽  
Medicine Clerkship ◽  
Time Problem ◽  
The Impact ◽  
Ecg Interpretation

Electrocardiography (ECG) interpretation is an essential skill for physicians as well as for many other health care professionals. Continuing education is necessary to maintain these skills. The process of teaching and learning ECG interpretation is complex and involves both deductive mechanisms and recognition of patterns for different clinical situations (“pattern recognition”). The successful methodologies of interactive sessions and real time problem based learning have never been evaluated with a long distance education model. To evaluate the efficacy of broadcasting ECG rounds to different hospitals in the Southeastern Ontario region; to perform qualitative research to determine the impact of this methodology in developing and maintaining skills in ECG interpretation. ECG rounds are held weekly at Kingston General Hospital and will be transmitted live to Napanee, Belleville, Oshawa, Peterborough and Brockville. The teaching methodology is based on real ECG cases. The audience is invited to analyze the ECG case and the coordinator will introduce comments to guide the case through the proper algorithm. Final interpretation will be achieved emphasizing the deductive process and the relevance of each case. An evaluation will be filled out by each participant at the end of each session. Videoconferencing works through a vast array of internet LANs, WANs, ISDN phone lines, routers, switches, firewalls and Codecs (Coder/Decoder) and bridges. A videoconference Codec takes the analog audio and video signal codes and compresses it into a digital signal and transmits that digital signal to another Codec where the signal is decompressed and retranslated back into analog video and audio. This compression and decompression allows large amounts of data to be transferred across a network at close to real time (384 kbps with 30 frames of video per second). Videoconferencing communication works on voice activation so whichever site is speaking has the floor and is seen by all the participating sites. A continuous presence mode allows each site to have the same visual and audio involvement as the host site. A bridged multipoint can connect between 8 and 12 sites simultaneously. This innovative methodology for teaching ECG will facilitate access to developing and maintaining skills in ECG interpretation for a large number of health care providers. Bertsch TF, Callas PW, Rubin A. Effectiveness of lectures attended via interactive video conferencing versus in-person in preparing third-year internal medicine clerkship students for clinical practice examinations. Teach Learn Med 2007; 19(1):4-8. Yellowlees PM, Hogarth M, Hilty DM. The importance of distributed broadband networks to academic biomedical research and education programs. Acad Psychaitry 2006;30:451-455

scholarly journals Toward a fully integrated automotive radar system-on-chip in 22 nm FD-SOI CMOS

2021 ◽  
pp. 1-9
Author(s):  
Philipp Ritter
Keyword(s):  
Millimeter Wave ◽  
Flip Chip ◽  
Printed Circuit Board ◽  
Digital Signal ◽  
Cmos Technology ◽  
Radar System ◽  
Circuit Board ◽  
Processing Unit ◽  
Automotive Radar ◽  
On Chip

Abstract Next-generation automotive radar sensors are increasingly becoming sensitive to cost and size, which will leverage monolithically integrated radar system-on-Chips (SoC). This article discusses the challenges and the opportunities of the integration of the millimeter-wave frontend along with the digital backend. A 76–81 GHz radar SoC is presented as an evaluation vehicle for an automotive, fully depleted silicon-over-insulator 22 nm CMOS technology. It features a digitally controlled oscillator, 2-millimeter-wave transmit channels and receive channels, an analog base-band with analog-to-digital conversion as well as a digital signal processing unit with on-chip memory. The radar SoC evaluation chip is packaged and flip-chip mounted to a high frequency printed circuit board for functional demonstration and performance evaluation.

scholarly journals An Automatic Offset Calibration Method for Differential Charge-Based Capacitance Measurement

2021 ◽  
Vol 11 (2) ◽  
pp. 22
Author(s):  
Umberto Ferlito ◽  
Alfio Dario Grasso ◽  
Michele Vaiana ◽  
Giuseppe Bruno
Keyword(s):  
Standard Deviation ◽  
Output Voltage ◽  
Process Variations ◽  
Calibration Method ◽  
Capacitance Measurement ◽  
Effective Technique ◽  
Fully Integrated ◽  
Front End ◽  
Novel Method ◽  
On Chip

Charge-Based Capacitance Measurement (CBCM) technique is a simple but effective technique for measuring capacitance values down to the attofarad level. However, when adopted for fully on-chip implementation, this technique suffers output offset caused by mismatches and process variations. This paper introduces a novel method that compensates the offset of a fully integrated differential CBCM electronic front-end. After a detailed theoretical analysis of the differential CBCM topology, we present and discuss a modified architecture that compensates mismatches and increases robustness against mismatches and process variations. The proposed circuit has been simulated using a standard 130-nm technology and shows a sensitivity of 1.3 mV/aF and a 20× reduction of the standard deviation of the differential output voltage as compared to the traditional solution.

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