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.
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TL;DR: In this paper, the authors present design and performance details of three photodetector circuits that have been developed in the authors laboratory over the past eight years, which have been optimized to meet the unique demands of experiments such as high power, high sensitivity interferometry, nonlinear optics, and laser noise measurements.
Abstract: We present design and performance details of three photodetector circuits that have been developed in the authors laboratory over the past eight years. These detectors have been optimized to meet the unique demands of experiments such as high power, high sensitivity interferometry, nonlinear optics, and laser noise measurements. The circuits are: a low-noise dc coupled (dc 20 MHz) general purpose detector, a low-noise broadband (15–1100 MHz) detector capable of detecting 10 mW of light, and a high-power large dynamic range detector (30 kHz–60 MHz) capable of detecting up to 100 mW of light. We present bandwidth dynamic range and noise performance details for all three designs. In addition, we present detailed circuit schematics along with design and construction guidelines to enable assembly and use of these designs.
69 citations
18 Jun 2008
TL;DR: An 11-bit, 50-Msps time-to-digital converter (TDC) using a multipath gated ring oscillator (GRO) with 6 ps of delay per stage achieves low power (2.2 to 21 mW) and small area of 160times260 mum in 0.13 mum CMOS.
Abstract: An 11-bit, 50-Msps time-to-digital converter (TDC) using a multipath gated ring oscillator (GRO) with 6 ps of delay per stage achieves low power (2.2 to 21 mW) and small area of 160times260 mum in 0.13 mum CMOS. The structure also achieves first order noise shaping of the GRO quantization and mismatch noise; the resulting TDC error integrates to <100 fs (rms) in a 1 MHz bandwidth to achieve dynamic range of over 90 dB with no calibration required.
69 citations
Patent•
28 May 1999TL;DR: In this paper, an extended dynamic range (XDR) imager with a row of XDR sample and hold circuits was proposed, where each column of the array captures a linear signal related to a difference between the output signal and an initial output signal to which the pixel is reset at the beginning of the integration period.
Abstract: The invention relates to an extended dynamic range imager (100). An array of pixels (120) provides an output signal for each pixel related to an amount of light captured for each pixel during an integration period. A row of extended dynamic range (XDR) sample and hold circuits (132) having an XDR sample and hold circuit for each column of the array captures an XDR signal related to a difference between the output signal and an XDR clamp level to which the pixel is reset at a predetermined time before the end of the integration period. A row of linear sample and hold circuits (131) having a linear sample and hold circuit for each column of the array captures a linear signal related to a difference between the output signal and an initial output signal to which the pixel is reset at the beginning of the integration period.
68 citations
TL;DR: In this paper, a high-speed white light interferometry (WLI) demodulation algorithm for low-finesse FPI has been developed, which has the advantage of spectral drift immunity, high precision, and simultaneous ac and dc signal measurement capability.
Abstract: Over decades, the signal demodulation techniques of low-finesse Fabry–Perot interferometer (FPI) sensors have been either slow with wide dynamic range and absolute measurement capability, or fast with narrow dynamic range and relative measurement capability. The tradeoff between the speed and the measurement capability has greatly limited the application of FPI-based sensors. In this letter, a novel high-speed white light interferometry (WLI) demodulation algorithm for low-finesse FPI has been developed. By realizing high-speed absolute demodulation utilizing full spectra, the new algorithm has the advantage of spectral drift immunity, high precision, and simultaneous ac and dc signal measurement capability, such as acoustic and temperature. A 70-kHz real-time WLI demodulation experiment was conducted in lab, in which the speed was limited only by the spectrometer hardware.
68 citations
68 citations