Topic
Dynamic range
About: Dynamic range is a research topic. Over the lifetime, 7576 publications have been published within this topic receiving 101739 citations. The topic is also known as: DNR & DR.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a novel fiber optic evanescent field absorption sensor with high sensitivity and linear dynamic range is proposed, which is achieved by using a U-shaped probe while linear response is obtained by preventing surface reactivity of the silica core of the fiber with the solute molecules of the absorbing fluid.
65 citations
Patent•
29 Jan 2010TL;DR: In this article, a circuit and related method for improving the dynamic range and the linearity characteristic of a CMOS image sensor is described, where a current sampler, a comparator, and a 1-bit memory are incorporated in each pixel circuit.
Abstract: Described herein is a circuit and related method for improving the dynamic range and the linearity characteristic of a CMOS image sensor. In various embodiments of the CMOS image sensor, a current sampler, a comparator, and a 1-bit memory are incorporated in each pixel circuit. In the image sensor, pixels are arranged in columns and a column slice is used to read the digital and analog singles from each column. In addition, a calibration circuit is incorporated in the sensor circuit for providing calibration current, which is used to generate calibration parameter. The image sensor operates in three non-overlapping modes: the difference mode, the WDR mode, and the calibration mode. The image sensor is switched among the three modes by control signals, which are provided to the image sensor by various control circuits. The image sensor normally operates in the difference mode and switches to the WDR mode when the difference between consecutive frames is over a threshold. The calibration mode allows the image sensor generate calibration parameters which are used to improve the linearity of the sensor through a interpolation method.
64 citations
TL;DR: An unconventional Fourier transform spectrometer is described which does not require mechanical scanning and incorporates features whereby the systematic background noise associated with this type of device may be compensated for to give good quality interferograms.
Abstract: An unconventional Fourier transform spectrometer is described which does not require mechanical scanning. The instrument uses a photodiode array as detector and incorporates features whereby the systematic background noise associated with this type of device may be compensated for to give good quality interferograms. Sample spectra are presented to demonstrate the performance of the instrument.
64 citations
09 Jun 1994
TL;DR: In this article, a second-order sigma-delta modulator with a 3-b internal quantizer employing the individual level averaging technique has been designed and implemented in a 1.2 μm CMOS technology.
Abstract: A second-order sigma-delta modulator with a 3-b internal quantizer employing the individual level averaging technique has been designed and implemented in a 1.2 μm CMOS technology. Testing results show no observable harmonic distortion components above the noise floor. Peak S/(N + D) ratio of 91 dB and dynamic range of 96 dB have been achieved at a clock rate of 2.56 MHz for a 20 KHz baseband. No tone is observed in the baseband as the amplitude of a 10 KHz input sine wave is reduced from −0.5 dB to −107 dB below the voltage reference. The active area of the prototype chip is 3.1 mm 2 and it dissipates 67.5 mW of power from a 5 V supply
64 citations
TL;DR: A comparison with state-of-the-art eddy-current sensor interfaces shows an improved figure of merit, which confirms the high performance of the proposed interface, and a ratiometric measurement principle is proposed.
Abstract: In this paper, a novel integrated eddy-current sensor interface is presented. The main targeted application is displacement measurement in an industrial environment, with resolution in the submicrometer range. A high excitation frequency of about 22 MHz is applied to minimize the skin effect of the generated eddy currents, when thin targets are used. The price to be paid is to process high-frequency signals. This is very challenging when high performance has to be achieved with respect to resolution and stability at minimum power consumption. To ensure high immunity of the interface to electromagnetic interferences, a second-order oscillator with a steep bandpass resonator is utilized as a front-end stage. The noise performance of the front-end stage is analyzed. To reduce the effect of this noise source on the resolution, a ratiometric measurement principle is proposed. In order to extract the displacement information, a novel amplitude-demodulation approach, including an offset cancellation technique, is introduced. The proposed circuit has been designed and implemented in a 0.35-μm BiCMOS process. In this design, the full-scale displacement range is 1.5 mm. The noise level allows a dynamic range of 75 dB with a measurement signal bandwidth of 1 kHz and only 9.5-mW power dissipation. A comparison with state-of-the-art eddy-current sensor interfaces shows an improved figure of merit, which confirms the high performance of the proposed interface.
64 citations