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A novel digital calibration technique is proposed to calibrate the capacitor mismatch in SAR ADCs. The capacitor mismatches are extracted based on the comparator metastability and intrinsic noise. The proposed technique does not require additional external control sequences or any modification of the main DAC. The simulation results of a 12-bit SAR ADC with 10% capacitor mismatch show that the SNDR...
This paper presents the design and implementation of an 11-bit 50-MS/s split successive approximation register (SAR) analog-to-digital converter (ADC) that features a comparator with input-referred offset cancellation, an improved split capacitor digital-to-analog converter (CDAC), and a CDAC mismatch calibrator. In order to reduce the input loading capacitance of the split CDAC, an extra unit capacitor...
We present a 200 MS/s 2x interleaved 14 bit pipelined SAR ADC in 28nm digital CMOS. The ADC uses a new residue amplifier for low noise at low power, and incorporates interleaved channel time-constant calibration. The ADC achieves a peak SNDR of 70.7 dB at 200 MS/s while consuming 2.3 mW from an 0.9 V supply.
A 210 MS/s dual-channel 12-bit analog-to-digital converter (ADC) employing a pipelined successive approximation (SAR) architecture is presented. The ADC is partitioned into 3 stages with passive residue transferring between the 1st and the 2nd stages and active residue amplification between the 2nd and the 3rd stages. The ADC consumes 5.3 mW from a 1-V supply and achieves an SNDR of 63.48 dB at a...
Recent publications have demonstrated ADCs with ENOB > 11, sampling frequencies > 50MHz, with power < 50mW, making the SAR ADC architecture an attractive alternative to the traditional pipeline. This paper presents a production quality 11.5 ENOB, 89dB SFDR, 100MS/s SAR ADC that, including the voltage reference and digital calibration circuitry, consumes 8mW and uses 0.1mm2 in 28nm CMOS. It...
Intrinsic calibration, i.e. finding the mapping between a camera's image positions and corresponding view rays, is a cumbersome, yet unavoidable task in order to accurately generate and interpret results from many kinds of image processing algorithms. We address this problem in the context of vehicle-mounted cameras with arbitrary fields of view with applications in advanced driver assistance systems...
This paper presents a novel method for extrinsic parameters estimation of a single line scan LiDAR and a camera. Using a checkerboard, the calibration setup is simple and practical. Particularly, the proposed calibration method is based on resolving geometry of the checkerboard that visible to the camera and the LiDAR. The calibration setup geometry is described by planes, lines and points. Our novelty...
Large mutual capacitance touch screen panels (TSP) are susceptible to display and ambient noise. This paper presents a multi-touch detection algorithm using an efficient noise compensation technique for large mutual capacitance TSPs. The algorithm starts with a calibration technique to overcome TSP mutual capacitance variation. It also overcomes the shadow effect of a hand close to TSP and mutual...
Airport noise and its impact on the surrounding areas are major issues in the aviation industry. The İstanbul Atatürk Airport is a major global airport with passenger numbers increasing rapidly per annum. The noise levels for day, evening and night times were modeled around the İstanbul Atatürk Airport according to the European Noise Directive using the actual data records for the year 2011. The “ECAC...
Collision avoidance for small unmanned aerial vehicles operating in a variety of environments is limited by the types of available depth sensors. Currently, there are no sensors that are lightweight, function outdoors in sunlight, and cover enough of a field of view to be useful in complex environments, although many sensors excel in one or two of these areas. We present a new depth estimation method,...
This paper describes speaker localization and speech detection techniques for domestic environments. In real environments, it is hard to localize speakers because reverberation causes discrepancy from the simple spherical wave assumption. We propose a template-based method that calibrates the localization errors included in conventional methods. In addition, we use statistical speech detection methods...
Many recent studies describe micromanipulation systems by using complex Analytic Forward Models (AFM), but such models are difficult to build and incapable of describing unmodelable factors, such as manufacturing defects. In this work, we propose the Enhanced Analytic Forward Model (EAFM), an integrated model of the AFM and the Heteroscedastic Gaussian Processes (HGP). The EAFM can compensate the...
The NASA AirMOSS instrument is a P-band (UHF) fully polarimetric synthetic aperture radar designed to measure root-zone soil moisture. The radar currently operates in the 420–440 MHz band in North America. Narrowband communications signals are secondary users of this spectrum and contribute RF interference to the radar's operation. An adaptive RF interference filter based on the least-mean squares...
In this paper we propose a novel Power Supply Noise (PSN) sensor. It is based on timing uncertainty measure. Compared to state of the art it allows to measure the PSN events in more accurate way. The proposed sensor is actually under validation and patent reviewing process.
Recently, mobile devices such as smart phones and quad-copters are being equipped with inertial measurement units (IMUs) because of advances in micro-electro-mechanical systems technology. This has increased the importance of IMU- camera fusion for vision-based applications. However, ultralow-cost IMUs take much less accurate measurements than low-cost and high-cost IMUs. This uncertainty degrades...
The Dark Matter Particle Explorer (DAMPE) is a scientific satellite designed to search for the clue of dark matter particles for a mission period of at least 3 years. Two types of readout ASICs, named VA160 and VATA160, are adopted for the front-end electronics (FEE) to meet the design specification. Total lot screening of VA160 and VATA160 is utilized to assist in achieving levels of quality and...
In this paper, a 12-bit pipeline ADC with doubledata-rate topology is proposed for high-speed CMOS image sensors (CIS). With a unique ping-pang architecture and a pseudo-noise cancellation scheme implemented, the designed ADC achieved a high sampling rate of 96Ms/s and with a good linearity and noise performance. The proposed ADC and image sensor chips are fabricated in the GSMC 0.13μm high-voltage...
Underwater acoustic measurements are made to provide validation and qualification for a wide range of applications and developments in the off-shore industry, oceanography, defense, fisheries, and geophysics. However, measurements are only meaningful if they are performed in a technically sound manner and if they can be related to common standards of measurement. In this paper, a summary is given...
Vehicle localization systems rely on measuring distances between a given target and a set of reference points. The accuracy of a localization system strictly depends on the exactness of these measurements. However, the estimation of distances via wireless signals is affected by errors due to factors such as channel noise and multipath propagation. Precise localization is very important for emergency...
This paper proposes Automatic Metric Rectification of projectively distorted 3D structures for man-made scenes using Angle Regularity. Man-made scenes, such as buildings, are characterized by a profusion of mutually orthogonal planes and lines. Assuming the availability of planar segmentation, we search for the rectifying 3D homography which maximizes the number of orthogonal plane-pairs in the structure...
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