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
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TL;DR: This article presents a 640 fully dynamic CMOS image sensor for the always-on operation that achieves a state-of-the-art energy efficiency figure- of-merit of 0.71 e− $\cdot $ nJ.
Abstract: This article presents a 640 $\times $ 640 fully dynamic CMOS image sensor for the always-on operation. It consists of a dynamic pixel source follower (SF), whose output signal is sampled into a parasitic column capacitor and then read out by a dynamic single-slope (SS) analog-to-digital converter (ADC) based on a dynamic bias comparator and an energy-efficient two-step counter. The prototype sensor was implemented in a 110-nm CMOS process, achieving 0.3% peak non-linearity, 6.1 e−rms random noise (RN), and 67-dB dynamic range. The power consumption is only 2.1 mW at 44 frames per second (fps) and is further reduced to 140 $\mu \text{W}$ at 5 fps with the sub-sampled 320 $\times $ 320 mode. This sensor achieves a state-of-the-art energy efficiency figure-of-merit of 0.71 e− $\cdot $ nJ.
27 citations
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20 Dec 2002TL;DR: In this article, a method of decreasing the dynamic range of a signal comprising the steps of determining a property of the signal, determining a limitation parameter based on the property of signal, limiting the signal by means of the limitation parameter, and clipping the limited signal was proposed.
Abstract: The invention relates to a method of decreasing the dynamic range of a signal comprising the steps of:- determining a property of the signal,- determining a limitation parameter based on the property of the signal, - limiting the signal by means of the limitation parameter, - clipping the limited signal.
27 citations
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TL;DR: The dynamic range of a Ronchi test with a phase-shifted sinusoidal grating was investigated theoretically and experimentally and it was shown that in order to optimize the dynamic range the effective wavelength of the interferogram should be tuned to the characteristic wavelengths of the object wave front.
Abstract: The dynamic range of a Ronchi test with a phase-shifted sinusoidal grating was investigated theoretically and experimentally As the number of fringes in a Ronchi interferogram increases, the fringe visibility decreases, which results in a decrease of phase-measurement resolution It is shown that in order to optimize the dynamic range the effective wavelength of the interferogram should be tuned to the characteristic wavelength of the object wave front The maximum dynamic range achievable is estimated to be 16 times larger than that of a Fizeau interferometer Suppressing higher-order diffraction components has achieved sheared interferograms with a signal-to-noise ratio in excess of 60:1 The effects of nonsinusoidal transmittance of the grating and the phase-shift errors were minimized by a seven-sample phase-shifting algorithm, and a phase measurement uncertainty of less than 1/700 has been achieved
27 citations
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12 May 1996TL;DR: In this paper, the authors discuss current-input current-output signal processors, the voltage state variables of which have a compressed dynamic range thanks to syllabic companding, which results in larger dynamic range in comparison to linear processors with the same power dissipation.
Abstract: We discuss current-input current-output signal processors, the voltage state variables of which have a compressed dynamic range thanks to syllabic companding. In this way, for a wide variation of input signals, the internal signals stay well above noise, while at the same time remaining below overload levels. This results in larger dynamic range in comparison to linear processors with the same power dissipation. Theoretical, simulation, and experimental results are given. The circuits presented are an illustration of a general technique for developing nonlinear circuits which are input-output linear.
27 citations
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01 Oct 2007
TL;DR: In this article, a CMOS front-end circuit suitable for silicon photomultiplier detectors (SiPM) based on a current buffer, as input stage, which features small input impedance and large bandwidth, thanks to the application of current feedback techniques.
Abstract: We propose a CMOS front-end circuit suitable for Silicon Photomultiplier detectors (SiPM) based on a current buffer, as input stage, which features small input impedance and large bandwidth, thanks to the application of current feedback techniques The current mode approach enhances the dynamic range of the front-end and does not suffer from possible voltage limitations due to deep-submicron CMOS implementation We report the first measurement results obtained by coupling the circuit prototype to a SiPM detector excited by a blue LED light source The measurements confirm the effectiveness of the proposed front-end approach and demonstrate its capability of managing large current signals with good linearity
27 citations