Impact of Parasitics on the Settling Time of a Readout Circuit for High Performance MEMS Accelerometers

2019 ◽  
Author(s):  
Alice Lanniel ◽  
Tobias Boeser ◽  
Lena Aichholz ◽  
Thomas Alpert ◽  
Maurits Ortmanns
Keyword(s):  
High Performance ◽  
Settling Time ◽  
Readout Circuit ◽  
Mems Accelerometers

scholarly journals A high performance integrated readout circuit for wavefront sensors

2020 ◽  
Vol 2 (11) ◽  
Author(s):  
Pablo N. Agra Belmonte ◽  
Ursula V. Abecassis ◽  
Lucas Chaves ◽  
Luciana P. Salles ◽  
Davies W. de Lima Monteiro
Keyword(s):  
High Performance ◽  
Readout Circuit ◽  
Wavefront Sensors

Design of a New Low Power Fully Differential Amplifier with Settling Time Enhancement Characteristics

2015 ◽  
Vol 24 (06) ◽  
pp. 1550078 ◽  
Author(s):  
Seid Jafar Hosseinipouya ◽  
Farhad Dastadast
Keyword(s):  
High Performance ◽  
Settling Time ◽  
Cmos Process ◽  
Output Stage ◽  
Common Mode ◽  
Class Ab ◽  
Fully Differential ◽  
Op Amp ◽  
Transconductance Amplifier ◽  
Adaptive Biasing

High performance of fully differential operational transconductance amplifier is designed and implemented using a 0.18-μm CMOS process. The implemented op-amp uses common mode feedback (CMFB) circuit operating in weak inversion region which does not affect other electrical characteristics due to eliminating common mode (CM) levels automatically leading to improve CM rejection ratio (CMRR) of the amplifier significantly. Moreover, the output stage has class-AB operation so that its current can be made larger due to increasing the output current dynamically using adaptive biasing circuit. Additionally, the AC currents of the active loads have been significantly reduced using negative impedances to increase the gain of the amplifier. The results show the GBW 2.3 MHz, slew rate 2.6 V/μs and 1% settling time 150 ns with a capacitive load of 15 pF. This amplifier dissipates only 6.2 μW from a 1.2 V power supply.

A high performance readout circuit (ROIC) with BDI structure for SWIR FPAs

2011 ◽  
Author(s):  
Li-chao Hao ◽  
Rui-jun Ding ◽  
Ai-bo Huang ◽  
Hong-lei Chen ◽  
Chun Zhou ◽  
...  
Keyword(s):  
High Performance ◽  
Readout Circuit

scholarly journals Advanced treatment of heavy oil wastewater for reuse by the combination of microwave enhanced coagulation and iron/carbon micro-electrolysis

2015 ◽  
Vol 6 (1) ◽  
pp. 40-49 ◽  
Author(s):  
Yong-Ming He ◽  
Ke-Yong Chen ◽  
Tian-Yu Zhang
Keyword(s):  
Corrosion Rate ◽  
Heavy Oil ◽  
High Performance ◽  
Produced Water ◽  
Irradiation Time ◽  
Oxygen Demand ◽  
Quality Parameters ◽  
Settling Time ◽  
Continuous Treatment ◽  
Mw Irradiation

A combination process was developed in laboratory scale including microwave (MW) coagulation and iron/carbon micro-electrolysis (Fe/C ME) in series for treatment of heavy oil produced water (HOPW) with high concentrations of oil and chemical oxygen demand and high corrosion rates. The effects of coagulant dosage, MW irradiation time, settling time, and Fe:C mass ratio on the actual treatment results were investigated. The use of MW irradiation brought some benefits including enhancing oil removal, reducing coagulation consumption, shortening settling time and lowering corrosion rate. During the 30-day continuous treatment period, the Fe-based metallic glasses/activated carbon (MGs/AC) ME system exhibited high performance stability, whereas the iron shavings/AC ME system had good performance for only 8 days. The total reduction percentages of oil, suspended solids and corrosion rate were 95.5%, 98.3% and 96.5%, respectively, in the combined MW coagulation-MGs/AC ME system, and the corrosion rate of the treated HOPW was only 0.025 mm/year. The quality parameters of the treated heavy oil produced water (HOPW) could completely meet the requirements of the C1 grade in the SY/T 5329-1994 standard for wastewater reinjection in oilfields. Moreover, the biodegradability of the HOPW was greatly improved after treatment, creating favorable conditions for subsequent biological treatment if not reinjection.

A Compact High-Performance 10-bit 30-Channel OLED Driver Using Switched Capacitor Circuit for High-Linearity Application

2021 ◽  
pp. 2250013
Author(s):  
Neeru Agarwal ◽  
Neeraj Agarwal ◽  
Chih-Wen Lu
Keyword(s):  
Power Consumption ◽  
Output Voltage ◽  
High Speed ◽  
High Performance ◽  
Input Voltage ◽  
Cmos Technology ◽  
Settling Time ◽  
Switched Capacitor ◽  
Voltage Range ◽  
High Output Voltage

This work proposes a new OLED driver architecture with 10-bit segmented DAC and switched capacitor multiply-by-two circuit application. A 30-channel 10-bit switched capacitor driver chip prototype is implemented in 0.18-[Formula: see text]m CMOS technology. In this architecture, the achieved output range is 1.5–4.8[Formula: see text]V for an input range of 1.5–3.15[Formula: see text]V, which is suitable for OLED driver with different colors. This architecture is not only converting the digital input signal to analog output for the display panel but also giving amplified high output voltage range. In the segmented DAC, 6-bit coarse DAC and 4-bit fine DAC are used for the input voltage range 1.5–3.15[Formula: see text]V. In a conventional RDAC for the output voltage of 4.8[Formula: see text]V, it requires 2[Formula: see text] switches i.e., 14-bit RDAC for the same resolution. Hence, conventional RDAC driver is four times larger than the proposed innovative very compact and high speed 10-bit segmented DAC switched capacitor OLED driver. The new architecture drastically reduces the number of switches and complex metal routing which results in reduced power consumption and good settling time. In the proposed OLED driver, no extra buffer is required as switched capacitor op-amp is applied for the same purpose with a gain of more than one. This high-resolution design with small die area also improves the linearity and uniformity with low-power consumption. The post-simulated results show that the OLED driver exhibits the maximum DNL and INL of 0.03 LSB and [Formula: see text]0.06 LSB, respectively, with an LSB voltage of 3[Formula: see text]mV. The one-channel area is 0.586[Formula: see text]mm [Formula: see text] 0.017[Formula: see text]mm and the settling time is 4.25[Formula: see text][Formula: see text]s for 30[Formula: see text]k[Formula: see text] and 30[Formula: see text]pF driving load.

scholarly journals Development of a high-performance readout circuit for photoelectric detectors

AIP Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 105026
Author(s):  
Honghui Yuan ◽  
Yongping Chen
Keyword(s):  
High Performance ◽  
Readout Circuit

scholarly journals Optimal Coronavirus Optimization Algorithm Based PID Controller for High Performance Brushless DC Motor

Algorithms ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 193
Author(s):  
Mohamed A. Shamseldin
Keyword(s):  
Optimization Algorithm ◽  
Rise Time ◽  
Pid Controller ◽  
High Performance ◽  
Harmony Search ◽  
Settling Time ◽  
Optimization Techniques ◽  
Bldc Motor ◽  
Brushless Dc ◽  
The Third

This paper presents an efficient coronavirus optimization algorithm (CVOA) to find the optimal values of the PID controller to track a preselected reference speed of a brushless DC (BLDC) motor under several types of disturbances. This work simulates how the coronavirus (COVID-19) spreads and infects healthy people. The initial values of PID controller parameters consider the zero patient, who infects new patients (other values of PID controller parameters). The model aims to simulate as accurately as possible the coronavirus activity. The CVOA has two major advantages compared to other similar strategies. First, the CVOA parameters are already adjusted according to disease statistics to prevent designers from initializing them with arbitrary values. Second, the approach has the ability to finish after several iterations where the infected population initially grows at an exponential rate. The proposed CVOA was investigated with well-known optimization techniques such as the genetic algorithm (GA) and Harmony Search (HS) optimization. A multi-objective function was used to allow the designer to select the desired rise time, the desired settling time, the desired overshoot, and the desired steady-state error. Several tests were performed to investigate the obtained proper values of PID controller parameters. In the first test, the BLDC motor was exposed to sudden load at a steady speed. In the second test, the continuous sinusoidal load was applied to the rotor of the BLDC motor. In the third test, different operating points of reference speed were selected to the rotor of the BLDC motor. The results proved that the CVOA-based PID controller has the best performance among the techniques. In the first test, the CVOA-based PID controller has a minimum rise time (0.0042 s), minimum settling time (0.0079 s), and acceptable overshoot (0.0511%). In the second test, the CVOA-based PID controller has the minimum deviation about the reference speed (±4 RPM). In the third test, the CVOA-based PID controller can accurately track the reference speed among other techniques.

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