Automatic ASET sensitivity evaluation of a custom-designed 180nm CMOS technology operational amplifier

2017 ◽  
Author(s):  
Andres Fontana ◽  
Sebastian M. Pazos ◽  
Fernando L. Aguirre ◽  
Felix Palumbo
Keyword(s):  
Operational Amplifier ◽  
Cmos Technology ◽  
Sensitivity Evaluation

Monolayer Graphene Field Effect Transistor-Based Operational Amplifier

2019 ◽  
Vol 28 (03) ◽  
pp. 1950052
Author(s):  
Ali Safari ◽  
Massoud Dousti ◽  
Mohammad Bagher Tavakoli
Keyword(s):  
Operational Amplifier ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Cmos Technology ◽  
Design System ◽  
Monolayer Graphene ◽  
Characteristic Curves ◽  
Op Amp ◽  
Graphene Field Effect Transistor ◽  
Effect Transistor

Graphene Field Effect Transistor (GFET) is a promising candidate for future high performance applications in the beyond CMOS roadmap for analog circuit applications. This paper presents a Verilog-A implementation of a monolayer graphene field-effect transistor (mGFET) model. The study of characteristic curves is carried out using advanced design system (ADS) tools. Validation of the model through comparison with measurements from the characteristic curves is carried out using Silvaco TCAD tools. Finally, the mGFET is used to design a GFET-based operational amplifier (Op-Amp). The GFET Op-Amp performances are tuned in term of the graphene channel length in order to obtain a reasonable gain and bandwidth. The main characteristics of the Op-Amp performance are compared with 0.18[Formula: see text][Formula: see text]m CMOS technology.

scholarly journals A 24.88 nV/√Hz Wheatstone Bridge Readout Integrated Circuit with Chopper-Stabilized Multipath Operational Amplifier

2020 ◽  
Vol 10 (1) ◽  
pp. 399 ◽  
Author(s):  
Kwonsang Han ◽  
Hyungseup Kim ◽  
Jaesung Kim ◽  
Donggeun You ◽  
Hyunwoo Heo ◽  
...  
Keyword(s):  
Integrated Circuit ◽  
Operational Amplifier ◽  
Wheatstone Bridge ◽  
Input Resistance ◽  
Cmos Technology ◽  
Low Noise ◽  
Oxide Semiconductor ◽  
Instrumentation Amplifier ◽  
Readout Integrated Circuit ◽  
Chopper Stabilization

This paper proposes a low noise readout integrated circuit (IC) with a chopper-stabilized multipath operational amplifier suitable for a Wheatstone bridge sensor. The input voltage of the readout IC changes due to a change in input resistance, and is efficiently amplified using a three-operational amplifier instrumentation amplifier (IA) structure with high input impedance and adjustable gain. Furthermore, a chopper-stabilized multipath structure is applied to the operational amplifier, and a ripple reduction loop (RRL) in the low frequency path (LFP) is employed to attenuate the ripple generated by the chopper stabilization technique. A 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) is employed to convert the output voltage of the three-operational amplifier IA into digital code. The Wheatstone bridge readout IC is manufactured using a standard 0.18 µm complementary metal-oxide-semiconductor (CMOS) technology, drawing 833 µA current from a 1.8 V supply. The input range and the input referred noise are ±20 mV and 24.88 nV/√Hz, respectively.

Input Bias Current Reduction Technique for Operational Amplifier in a Standard CMOS Technology

2020 ◽  
Vol 140 (1) ◽  
pp. 9-15
Author(s):  
Koken Chin ◽  
Mamoru Ohsawa ◽  
Atsushi Kitajima ◽  
Yoshiaki Arai ◽  
Jun Yamashita ◽  
...  
Keyword(s):  
Operational Amplifier ◽  
Cmos Technology ◽  
Bias Current ◽  
Reduction Technique ◽  
Current Reduction

scholarly journals Design and analysis of folded cascode operational amplifier using 0.13 µm CMOS technology

2020 ◽  
Author(s):  
Lee Cha Sing ◽  
N. Ahmad ◽  
M. Mohamad Isa ◽  
F. A. S. Musa
Keyword(s):  
Operational Amplifier ◽  
Cmos Technology ◽  
Folded Cascode

scholarly journals Design of Bessel High Order All Pass Filter Based on AN OTRA

2019 ◽  
Vol 8 (4) ◽  
pp. 242-244
Keyword(s):  
Theoretical Approach ◽  
Operational Amplifier ◽  
Cmos Technology ◽  
Slew Rate ◽  
Pass Filter ◽  
Single Input Single Output ◽  
Large Bandwidth ◽  
Single Output ◽  
Filter Structure ◽  
Single Input

This paper features a single-input single-output (SISO). The suggested circuit is depend on OTRA which is referred as operational transresistance amplifier. and OTRA recommended on the parameters of its increasing slew rate and large bandwidth as compared to conventional circuit containing operational amplifier. In this paper Bessel Higher order All Pass filter structure are described and their simulation is carried out in PSPICE with the help of 0.5μm CMOS technology and simulation result follows the theoretical approach.

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