A Full Input Range, 1-1.8 V Voltage Supply Scalable Analog Voltage Comparator in 180nm CMOS

2020 ◽  
Author(s):  
Ashima Gupta ◽  
Anil Singh ◽  
Alpana Agarwal
Keyword(s):  
Voltage Comparator ◽  
Voltage Supply ◽  
Input Range ◽  
Analog Voltage

scholarly journals Design of Constant Transconductance Operational Amplifier By CMOS With High Gain And Low Operational Power

2021 ◽  
Author(s):  
Parvesh Kumar ◽  
Tarun Chaudhary ◽  
Vijay Kumar Ram
Keyword(s):  
Operational Amplifier ◽  
High Gain ◽  
Transmission Capacity ◽  
Constant Current ◽  
Common Mode ◽  
Voltage Supply ◽  
Input Range ◽  
Constant Transconductance ◽  
Small Capacity

In the following paper, there is a presentation of a small potential, small capacity CMOS which programs numerically working trans conductance circuit of an amplifier (OTA). A constant transconductance up to (7% of max variation) secures the whole usual-mode of the input range. The circuit process and it can also be operated on a voltage supply of 3.3V with a common-mode range of input from 0.3 to 1.6V. A constant-current is maintained by the designed OTA and also provide a continuous transmission capacity for varying burden capacitors with no increase in consumption of capacity. Simulation of the circuit works upon T-SPICE .5 µm level 49 sub-micron technology.

A Scalable Fully-Digital Differential Analog Voltage Comparator

2021 ◽  
Author(s):  
Ashima Gupta ◽  
Anil Singh ◽  
Alpana Agarwal
Keyword(s):  
Supply Voltage ◽  
Complementary Metal Oxide Semiconductor ◽  
Process Variations ◽  
Digital Design ◽  
Oxide Semiconductor ◽  
Design Environment ◽  
Worst Case ◽  
Voltage Comparator ◽  
Offset Voltage ◽  
Analog Voltage

This paper presents a scalable Fully-digital differential analog voltage comparator designed in Semi-Conductor Laboratory (SCL) 180[Formula: see text]nm complementary metal-oxide semiconductor technology. The proposed design is based on a digital design approach and is easily configurable to lower technology nodes. This design methodology makes the circuit less sensitive to process variations and takes fewer design efforts suitable for Systems-on-a-Chips (SOCs) application. The proposed circuit is designed and simulated in Cadence Virtuoso Analog Design Environment at the supply voltage ranging from 1[Formula: see text]V to 1.8[Formula: see text]V. The fully-digital analog voltage comparator has been synthesized using Synopsys Design Vision and auto-placed & auto-routed using Synopsys IC Compiler. This proposed comparator has a resolution of up to 7-bit at a supply voltage of 1.8[Formula: see text]V and a worst-case operating frequency of about 750 MHz at the TT corner. The obtained value of the offset voltage and delay is 0.55[Formula: see text]mV and 0.72 ns, respectively. The simulated results have shown that the power dissipation of the proposed scalable analog voltage comparator is [Formula: see text][Formula: see text]V and [Formula: see text][Formula: see text]V supply voltage, respectively. Also, the RC extracted post-layout simulations have been implemented to verify the performance, which does not affect the results much.

Needle-disk Electrospinning: Mechanism Elucidation, Parameter Optimization and Productivity Improvement

2020 ◽  
Vol 14 (1) ◽  
pp. 46-55 ◽  
Author(s):  
Zhi Liu ◽  
Lei Zhou ◽  
Fangtao Ruan ◽  
Anfang Wei ◽  
Jianghui Zhao ◽  
...  
Keyword(s):  
Parameter Optimization ◽  
Low Voltage ◽  
Rotation Velocity ◽  
Needle Length ◽  
Productivity Improvement ◽  
Voltage Supply ◽  
Nanofiber Morphology ◽  
Disk Rotation ◽  
Industrial Employment ◽  
Spinning Process

Background: Nanofiber’s productivity plagues nanofibrous membranes’ applications in many areas. Herein, we present the needle-disk electrospinning to improve throughput. In this method, multiple high-curvature mentals are used as the spinning electrode. Methods: Three aspects were investigated: 1) mechanism elucidation of the needle-disk electrospinning; 2) parameter optimization of the needle-disk electrospinning; 3) productivity improvement of the needle-disk electrospinning. Results: Results show that high-curvature electrode evokes high electric field intensity, making lower voltage supply in spinning process. The needle number, needle length and needle curvature synergistically affect the spinning process and nanofiber morphology. Additionally, higher disk rotation velocity and higher voltage supply can also result in higher nanofiber’s productivity. Conclusion: Compared with previous patents related to this topic, the needle-disk electrospinning is featured with the merits of high throughput, low voltage supply, controllable spinning process and nanofiber morphology, benefiting the nanofiber practical industrial employment and further applications of nanofiber-based materials.

scholarly journals Two-stage segment linearization as part of the thermocouple measurement chain

2021 ◽  
Vol 54 (1-2) ◽  
pp. 141-151
Author(s):  
Dragan Živanović ◽  
Milan Simić
Keyword(s):  
Transfer Functions ◽  
Approximation Error ◽  
Linearization Method ◽  
Linear Segment ◽  
Virtual Instrumentation ◽  
Memory Consumption ◽  
Thermocouple Measurement ◽  
Two Stage ◽  
Approximation Errors ◽  
Input Range

An implementation of a two-stage piece-wise linearization method for reduction of the thermocouple approximation error is presented in the paper. First, the whole thermocouple measurement chain of a transducer is described, and possible error is analysed to define the required level of accuracy for linearization of the transfer characteristics. Evaluation of linearization functions and analysis of approximation errors are performed by the virtual instrumentation software package LabVIEW. The method is appropriate for thermocouples and other sensors where nonlinearity varies a lot over the range of input values. The basic principle of this method is to first transform the abscissa of the transfer function by a linear segment look-up table in such a way that significantly nonlinear parts of the input range are expanded before a standard piece-wise linearization. In this way, applying equal-segment linearization two times has a similar effect to non-equal-segment linearization. For a given examples of the thermocouple transfer functions, the suggested method provides significantly better reduction of the approximation error, than the standard segment linearization, with equal memory consumption for look-up tables. The simple software implementation of this two-stage linearization method allows it to be applied in low calculation power microcontroller measurement transducers, as a replacement of the standard piece-wise linear approximation method.

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