The Application Of Commercial Star Couplers To Increase Signal Dynamic Range

1984 ◽  
Author(s):  
B. M. Whitcomb ◽  
V. N. Smiley ◽  
R. L. Flurer ◽  
L. K. Nelson
Keyword(s):  
Dynamic Range ◽  
Signal Dynamic Range ◽  
Signal Dynamic

Multibeam transmitter for signal dynamic range reduction in incoherent lidar systems

1992 ◽  
Vol 31 (36) ◽  
pp. 7623 ◽  
Author(s):  
Yanzeng Zhao ◽  
R. M. Hardesty ◽  
M. J. Post
Keyword(s):  
Dynamic Range ◽  
Range Reduction ◽  
Signal Dynamic Range ◽  
Dynamic Range Reduction ◽  
Signal Dynamic

scholarly journals Exponentiation conversion circuit capable of changing the power exponent to any value

2021 ◽  
Author(s):  
Masahiro Arai ◽  
Yuji Sano
Keyword(s):  
Input Signal ◽  
Dynamic Range ◽  
Electronic Devices ◽  
Small Scale ◽  
Power Exponent ◽  
Cmos Process ◽  
Exponential Power ◽  
Signal Dynamic Range ◽  
Subthreshold Operation ◽  
Signal Dynamic

AbstractWe proposed an exponentiation conversion circuit which can change its power exponent to any value to compensate the nonlinearity of electronic devices. The proposed circuit is a small scale circuit utilizing the exponential characteristic in the subthreshold operation of MOSFET. In the proposed circuit, the new exponential conversion circuit converts signal multiplied logarithmically transformed input signal by the power exponent value, thereby obtaining the exponential power raised power function characteristic. The proposed circuit is suitable to integrate on a microcomputer chip used for IoT. The performance of the circuit was evaluated by a prototype IC made by 0.6 μm CMOS process. In measured results, the exponential conversion characteristics as set were obtained, the exponent value was set to 0.50, 1.00 and 2.00. By using the cascode exponential conversion circuit, the signal dynamic range was expanded by 5.2 dB when the exponent value was set to 2.00.

The Logarithmic Amplifier with I/O Characteristic Approaching Horizontal Line

2011 ◽  
Vol 298 ◽  
pp. 257-261
Author(s):  
Heng Wang ◽  
Gui Hua Liu
Keyword(s):  
Dynamic Range ◽  
Automatic Gain Control ◽  
Gain Control ◽  
Intermediate Frequency ◽  
Open Loop ◽  
Horizontal Line ◽  
Logarithmic Amplifier ◽  
Current Design ◽  
Signal Dynamic Range ◽  
Signal Dynamic

A special logarithmic amplifier, which input signal dynamic range is 0-90 dB and output signal dynamic range is 1-1.2 times, is described in the key point of the current design compared with conventional methods. The I/O characteristic of the logarithmic amplifier shows approximately a horizontal line. Instead of the main intermediate frequency amplifier circuit with automatic gain control of radar, the special logarithmic amplifier was applied to track the plane and test it in airport. It is superior to common automatic gain control circuit for its much lower failure rate, inexpensive in some occasion, especially the perfect function of anti-jamming ability. Experimental results and data analysis illustrating the performance of the design are presented. Meanwhile, this circuit can be applied in military and civil products that need automatic control system of open loop.

scholarly journals Statistic Model of Homodyne Acousto-Optic Spectrum Analyzer

2020 ◽  
Vol 23 (1) ◽  
pp. 52-62
Author(s):  
L. A. Aronov ◽  
Yu. S. Dobrolensky ◽  
G. V. Kulak
Keyword(s):  
Shot Noise ◽  
Dynamic Range ◽  
Spectrum Analyzer ◽  
Optical Modulator ◽  
Accurate Estimation ◽  
Spurious Free Dynamic Range ◽  
Readout Noise ◽  
Signal Dynamic Range ◽  
Signal Dynamic ◽  
Free Dynamic

Introduction. Acousto-optic spectrum analyzers interferometric schemes have been developed to increase dynamic range. It was assumed that dynamic range, expressed in dB, would double. An expected increase was not achieved yet.Aim. To analyze the homodyne acousto-optic spectrum analyzer noise characteristics, to estimate the signal-tonoise ratio and the dynamic range.Materials and methods. A mathematical model was compiled which took into account the need to form quadrature components to obtain an amplitude spectrum of an input signal, shot noise and readout noise.Results. An interferometric scheme did not allow to achieve dynamic range doubling compared to an acoustooptical power spectrum analyzer. The dynamic range increase was less than 1.35 dB. Constant illumination led to a significant increase of the spectrum analyzer self-noise due to shot noise, compared to which thermal noise and readout noise became insignificant. The spurious-free dynamic range estimation expression was obtained. It was prior determined by acousto-optic interaction nonlinearity. With typical analyzer blocks parameters the spurious-free dynamic range covered a single-signal dynamic range. Signal-to-noise ratio estimation expression was presented.Conclusion. The homodyne acousto-optic spectrum analyzer single-signal dynamic range is determined primarily by the photosensor saturation charge. One needs to optimize their relation by taking into account light source power, acousto-optical modulator diffraction efficiency and photosensor saturation charge. Presented noise model gives more accurate estimation of the dynamic range with an error of 1 dB.

scholarly journals Optimized Design of OTA-Based Gyrator Realizing Fractional-Order Inductance Simulator: A Comprehensive Analysis

2020 ◽  
Vol 11 (1) ◽  
pp. 291
Author(s):  
David Kubanek ◽  
Jaroslav Koton ◽  
Jan Dvorak ◽  
Norbert Herencsar ◽  
Roman Sotner
Keyword(s):  
Fractional Order ◽  
Integrated Circuit ◽  
Dynamic Range ◽  
Active Element ◽  
Comprehensive Analysis ◽  
Optimized Design ◽  
Operational Transconductance Amplifier ◽  
Transconductance Amplifier ◽  
Signal Dynamic Range ◽  
Signal Dynamic

A detailed analysis of an operational transconductance amplifier based gyrator implementing a fractional-order inductance simulator is presented. The influence of active element non-ideal properties on the gyrator operation is investigated and demonstrated by admittance characteristics and formulas for important values and cut-off frequencies in these characteristics. Recommendations to optimize the performance of the gyrator in terms of operation bandwidth, the range of obtainable admittance magnitude, and signal dynamic range are proposed. The theoretical observations are verified by PSpice simulations of the gyrator with LT1228 integrated circuit.

scholarly journals ICESAT/GLAS Altimetry Measurements: Received Signal Dynamic Range and Saturation Correction

2017 ◽  
Vol 55 (10) ◽  
pp. 5440-5454 ◽  
Author(s):  
Xiaoli Sun ◽  
James B. Abshire ◽  
Adrian A. Borsa ◽  
Helen Amanda Fricker ◽  
Donghui Yi ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Signal Dynamic Range ◽  
Signal Dynamic
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