An Accurate and Stable Sliding DFT Computed by a Modified CIC Filter [Tips & Tricks]

2017 ◽  
Vol 34 (1) ◽  
pp. 89-93 ◽  
Author(s):  
Denis A. Gudovskiy ◽  
Lichung Chu
Keyword(s):  
Cic Filter ◽  
Stable Sliding

STABLE, SLIDING, SLIPPERY SUBSTANCES

The Sciences ◽  
1969 ◽  
Vol 9 (1) ◽  
pp. 24-26
Keyword(s):  
Stable Sliding

scholarly journals A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNR

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4199 ◽  
Author(s):  
Behnam Samadpoor Rikan ◽  
Sang-Yun Kim ◽  
Nabeel Ahmad ◽  
Hamed Abbasizadeh ◽  
Muhammad Riaz Ur Rehman ◽  
...  
Keyword(s):  
Input Signal ◽  
Flicker Noise ◽  
Signal To Noise Ratio ◽  
Pressure Sensors ◽  
High Gain ◽  
Cmos Process ◽  
Signal Conditioning ◽  
Sigma Delta ◽  
Cic Filter ◽  
Decimation Filter

This paper presents a second-order discrete-time Sigma-Delta (SD) Analog-to-Digital Converter (ADC) with over 80 dB Signal to Noise Ratio (SNR), which is applied in a signal conditioning IC for automotive piezo-resistive pressure sensors. To reduce the flicker noise of the structure, choppers are used in every stage of the high gain amplifiers. Besides, to reduce the required area and power, only the CIC filter structure is adopted as a decimation filter. This filter has a configurable structure that can be applied to different data rates and input signal bandwidths. The proposed ADC was fabricated and measured in a 0.18-µm CMOS process. Due to the application of only a CIC filter, the total active area of the SD-ADC and reference generator is 0.49 mm2 where the area of the decimation filter is only 0.075 mm2. For the input signal bandwidth of 1.22 kHz, it achieved over 80 dB SNR in a 2.5 MHz sampling frequency while consuming 646 µW power.

scholarly journals Efficient sharpening CIC filter embedding fifth-order filter with coefficient optimisation algorithm

2020 ◽  
Vol 56 (23) ◽  
pp. 1241-1243
Author(s):  
Lin Zhibin ◽  
Gao Bo ◽  
Yin Ruotong ◽  
Gong Min
Keyword(s):  
Optimisation Algorithm ◽  
Order Filter ◽  
Cic Filter ◽  
Fifth Order

Large-Scale Evaluation of Constrained Bearing Elements Made of Thermosetting Polyester Resin and Polyester Fabric Reinforcement

2006 ◽  
Vol 128 (4) ◽  
pp. 681-696 ◽  
Author(s):  
P. Samyn ◽  
W. Van Paepegem ◽  
J. S. Leendertz ◽  
A. Gerber ◽  
L. Van Schepdael ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Large Scale ◽  
Elastic Recovery ◽  
Small Scale ◽  
Practical Implementation ◽  
Fiber Failure ◽  
Stick Slip ◽  
Composite Surface ◽  
Pull Out ◽  
Stable Sliding

Polymer composites are increasingly used as sliding materials for high-loaded bearings, however, their tribological characteristics are most commonly determined from small-scale laboratory tests. The static strength and dynamic coefficients of friction for polyester/polyester composite elements are presently studied on large-scale test equipment for determination of its bearing capacity and failure mechanisms under overload conditions. Original test samples have a diameter of 250 mm and thickness of 40 mm, corresponding to the practical implementation in the sliding surfaces of a ball-joint, and are tested at various scales for simulation of edge effects and repeatability of test results. Static tests reveal complete elastic recovery after loading to 120 MPa, plastic deformation after loading at 150 MPa and overload at 200 MPa. This makes present composite favorable for use under high loads, compared to, e.g., glass-fibre reinforced materials. Sliding tests indicate stick-slip for pure bulk composites and more stable sliding when PTFE lubricants are added. Dynamic overload occurs above 120 MPa due to an expansion of the nonconstrained top surface. A molybdenum-disulphide coating on the steel counterface is an effective lubricant for lower dynamic friction, as it favorably impregnates the composite sliding surface, while it is not effective at high loads as the coating is removed after sliding and high initial static friction is observed. Also a zinc phosphate thermoplastic coating cannot be applied to the counterface as it adheres strongly to the composite surface with consequently high initial friction and coating wear. Most stable sliding is observed against steel counterfaces, with progressive formation of a lubricating transfer film at higher loads due to exposure of PTFE lubricant. Composite wear mechanisms are mainly governed by thermal degradation of the thermosetting matrix (max. 162°C) with shear and particle detachment by the brittle nature of polyester rather than plastic deformation. The formation of a sliding film protects against fiber failure up to 150 MPa, while overload results in interlaminar shear, debonding, and ductile fiber pull-out.

Effect of Sliding Rate on the Activity of Acoustic Emission During Stable Sliding

2003 ◽  
Vol 160 (7) ◽  
pp. 1163-1189 ◽  
Author(s):  
N. Kato ◽  
K. Yamamoto ◽  
T. Hirasawa ◽  
Y. Yabe
Keyword(s):  
Acoustic Emission ◽  
Stable Sliding

Efficient digital IF architecture for wideband OFDM systems based on CIC filter

2014 ◽  
Author(s):  
Guixin Xuan ◽  
Yawei Han ◽  
Min Ren ◽  
Zhenyu Zhang ◽  
Fanxin Zeng
Keyword(s):  
Ofdm Systems ◽  
Cic Filter

Design of selective CIC filter functions

2014 ◽  
Vol 68 (12) ◽  
pp. 1231-1233 ◽  
Author(s):  
Biljana P. Stošić ◽  
Vlastimir D. Pavlović
Keyword(s):  
Cic Filter
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