2-Phase Higher-Order Switched-Capacitor Low-Pass Filters Using Single Operational Amplifier

2021 ◽  
Vol 141 (12) ◽  
pp. 1306-1312
Author(s):  
Weiwei Shao ◽  
Shigetaka Takagi ◽  
Hiroki Sato
Keyword(s):  
Operational Amplifier ◽  
Higher Order ◽  
Switched Capacitor ◽  
Low Pass ◽  
Low Pass Filters

Using Microstrip LPF in Gysel Power Divider for Extreme Size Reduction and Higher Order Harmonic Suppression

Frequenz ◽  
2015 ◽  
Vol 69 (7-8) ◽  
Author(s):  
H. Siahkamari ◽  
S. Vahab A. Makki ◽  
S.-A. Malakooti
Keyword(s):  
Transmission Lines ◽  
Return Loss ◽  
Higher Order ◽  
Power Divider ◽  
Harmonic Suppression ◽  
Harmonic Rejection ◽  
Measurement Results ◽  
Low Pass ◽  
Power Handling Capability ◽  
Low Pass Filters

AbstractThis paper presents a new design of a compact Gysel power divider with harmonic suppression. It comprises six similar low-pass filters in lieu of six conventional transmission lines in the Gysel power divider. Not only does the proposed power divider extremely reduce the occupied area to 22.7% of the conventional Gysel power divider at 900 MHz, but also it features the higher order harmonic rejection. Simulation and measurement results show good insertion loss, return loss, isolation, and wide stopband bandwidth, while maintaining high-power handling capability over the Wilkinson power divider.

scholarly journals Troubleshooting Plantwide Oscillations using Nonlinearity Information

2010 ◽  
pp. 50-60 ◽  
Author(s):  
MAA Shoukat Choudhury
Keyword(s):  
Case Studies ◽  
Diagnostic Method ◽  
Chemical Engineering ◽  
Higher Order ◽  
Chemical Processes ◽  
Industrial Plant ◽  
Process Performance ◽  
Process Data ◽  
Low Pass ◽  
Low Pass Filters

Plant-wide oscillations are common in many processes. Their effects propagate to many units and mayimpact the overall process performance. It is important to detect and diagnose the cause of suchoscillations in order to rectify the situation and maintain the proper profitability of the plant. This paperproposes a new procedure to detect and diagnose plant-wide oscillations using routine operating data. Themethod has been developed based on the nonlinearity information in the process data. A new TotalNonlinearity Index (TNLI) has been defined to quantify nonlinearities. The method is based on theassumption that the nonlinearity is highest near the source and decreases as one moves away from thesource. This assumption is true because chemical processes have the nature of low-pass filters and theyfilter out gradually higher order harmonics of the signals. Signals with higher order harmonics aregenerally more nonlinear. The proposed diagnostic method has already been successfully applied fortroubleshooting many industrial plant-wide oscillation problems. Two of such case studies have beenpresented in this paper.Journal of Chemical Engineering Vol.ChE 24 2006 50-60

Ku/Ka-band Compact Orthomode Junction with Low Pass Filters for High Power Applications

2015 ◽  
Vol E98.C (2) ◽  
pp. 156-161
Author(s):  
Hidenori YUKAWA ◽  
Koji YOSHIDA ◽  
Tomohiro MIZUNO ◽  
Tetsu OWADA ◽  
Moriyasu MIYAZAKI
Keyword(s):  
High Power ◽  
Ka Band ◽  
Low Pass ◽  
Low Pass Filters

Mathematical Model of Low-Pass Filters

2011 ◽  
Vol 5 (2) ◽  
pp. 155-162
Author(s):  
Jose de Jesus Rubio ◽  
Diana M. Vazquez ◽  
Jaime Pacheco ◽  
Vicente Garcia
Keyword(s):  
Mathematical Model ◽  
Low Pass ◽  
Low Pass Filters

scholarly journals Delay Equivalences in Tuning PID Control for the Double Integrator Plus Dead-Time

Mathematics ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 328
Author(s):  
Mikulas Huba ◽  
Damir Vrancic
Keyword(s):  
Dead Time ◽  
Pid Controllers ◽  
Noisy Environment ◽  
Advantages And Disadvantages ◽  
Implementation Problem ◽  
Low Pass ◽  
Excellent Control ◽  
Low Pass Filters ◽  
Double Integrator

The paper investigates and explains a new simple analytical tuning of proportional-integrative-derivative (PID) controllers. In combination with nth order series binomial low-pass filters, they are to be applied to the double-integrator-plus-dead-time (DIPDT) plant models. With respect to the use of derivatives, it should be understood that the design of appropriate filters is not only an implementation problem. Rather, it is also critical for the resulting performance, robustness and noise attenuation. To simplify controller commissioning, integrated tuning procedures (ITPs) based on three different concepts of filter delay equivalences are presented. For simultaneous determination of controller + filter parameters, the design uses the multiple real dominant poles method. The excellent control loop performance in a noisy environment and the specific advantages and disadvantages of the resulting equivalences are discussed. The results show that none of them is globally optimal. Each of them is advantageous only for certain noise levels and the desired degree of their filtering.

scholarly journals 1.0 V-0.18 µm CMOS Tunable Low Pass Filters with 73 dB DR for On-Chip Sensing Acquisition Systems

Electronics ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 563
Author(s):  
Jorge Pérez-Bailón ◽  
Belén Calvo ◽  
Nicolás Medrano
Keyword(s):  
Power Consumption ◽  
Dynamic Range ◽  
Low Voltage ◽  
Cutoff Frequency ◽  
Cmos Technology ◽  
Active Area ◽  
Current Steering ◽  
Low Pass ◽  
On Chip ◽  
Low Pass Filters

This paper presents a new approach based on the use of a Current Steering (CS) technique for the design of fully integrated Gm–C Low Pass Filters (LPF) with sub-Hz to kHz tunable cut-off frequencies and an enhanced power-area-dynamic range trade-off. The proposed approach has been experimentally validated by two different first-order single-ended LPFs designed in a 0.18 µm CMOS technology powered by a 1.0 V single supply: a folded-OTA based LPF and a mirrored-OTA based LPF. The first one exhibits a constant power consumption of 180 nW at 100 nA bias current with an active area of 0.00135 mm2 and a tunable cutoff frequency that spans over 4 orders of magnitude (~100 mHz–152 Hz @ CL = 50 pF) preserving dynamic figures greater than 78 dB. The second one exhibits a power consumption of 1.75 µW at 500 nA with an active area of 0.0137 mm2 and a tunable cutoff frequency that spans over 5 orders of magnitude (~80 mHz–~1.2 kHz @ CL = 50 pF) preserving a dynamic range greater than 73 dB. Compared with previously reported filters, this proposal is a competitive solution while satisfying the low-voltage low-power on-chip constraints, becoming a preferable choice for general-purpose reconfigurable front-end sensor interfaces.

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