FREE ENGINEERING RESEARCH PAPERS

free research paper on analog electronics-opamp-operational amplifier 2014




DESIGN OF LOW POWER OPERATIONAL AMPLIFIER USING CMOS TECHNOLOGIES
free download

Abstract: Now days use of most of the electric components have been increased due to that power dissipation and the use of the power given to the electric electronic circuits are not fully utilized. So to avoid this problem the concept of Low Power system arises. As part of

Design Of Two Stage CMOS Operational Amplifier in 180nm Technology With Low Power and High CMRR
free download

Abstract:--In this paper a CMOS two stage operational amplifier has been presented which operates at 2.5 V power supply at 0.18 micron (ie, 180 nm) technology and whose input is depended on Bias Current. The supply voltage has been scaled down to reduce overall

Low Noise High Gain Operational Amplifier Design using Positive Feedback at Load and Diffrential End
free download

Abstract The paper represents low noise, high gain differential amplifier circuit using positive feedback at load and at differential end to increase gain. The circuit is designed with short- channel MOSFETs, low noise, and low voltage, resulting in DC gain amendment over a

Design and Performance Analysis of Low Power RF Operational Amplifier using CMOS and BiCMOS Technology
free download

Abstract:This paper presents the design and performance comparison of a two stage operational amplifier topology using CMOS and BiCMOS technology. This conventional op amp circuit was designed by using RF model of BSIM3V3 in 0.6 µm CMOS technology

Design of CMOS Two-stage Operational Amplifier for ECG Monitoring System Using 90nm Technology
free download

Abstract This paper presents a high performance Two-stage operational amplifier for biomedical applications. This Two-stage is designed for low noise, low power, high PSRR and high CMRR. The Miller compensation technique (Cc) is used with a nulling active
This paper presents design methods for the designing and simulation of fuzzy membership functions (S, Z, trapezoidal and triangular) using operational amplifier in SPICE. This is the interactive tool which gets the design requirements for the system to be designed from the

A Low Power Low Noise Chopper-Stabilized Tow-stage Operational Amplifier for Portable Bio-potential Acquisition Systems Using 90 nm Technology
free download

Abstract This paper presents a high performance chopper-Stabilized Two-stage operational amplifier for biomedical applications. This Two-stage is designed for low noise, low power, high PSRR and high CMRR. The Miller compensation technique (Cc) is used with a

A HIGHLY ADAPTIVE OPERATIONAL AMPLIFIER WITH RECYCLING FOLDED CASCODE TOPOLOGY.
free download

ABSTRACT This paper presents a highly adaptive operational amplifier with high gain, high bandwidth, high speed and low power consumption. By adopting the recycling folded cascode topology along with an adaptive-biasing circuit, this design achieves high

The Second Order Difference Equation Technique Using in Operational Amplifier Circuit
free download

ABSTRACT An Operational Amplifier circuit was designed and tested to solve any second order linear difference equation. Using the various simulator input types were testes across the input terminals of computer and Examples. Consider the generic difference equation

DESIGN OF LOSSLESS GROUNDED NEGATIVE INDUCTANCE SIMULATOR USING SINGLE OPERATIONAL TRANSRESISTANCE AMPLIFIER
free download

In this paper a novel lossless grounded negative inductance simulator is proposed using only one operational transresistance amplifier (OTRA) as an active element and one capacitor and three or four resistors as passive elements. All the properties of the

A High-Gain and Low-Noise 0.9 µW Operational Amplifier
free download

Abstract A low-voltage, low-power, high-gain and low-noise operational transconductance amplifier (OTA) by modifying conventional one is presented and analyzed. Design strategies are discussed for minimizing noise and increasing gain. The simulation results show that

Design and Implementation of High Gain, High Bandwidth CMOS Folded cascodeOperational Transconductance Amplifier
free download

Abstract:This paper deals with design and analysis of CMOS folded-cascode operational transconductance amplifier. Operational transconductance Amplifier (OTA) is a fundamental building block of analog circuits and systems which were previously implemented by

DESIGN OF LOW-VOLTAGE, HIGH-GAIN OPERATIONAL AMPLIFIER FOR DATA CONVERTERS
free download

Abstract: The objective of this paper is to design a lowvoltage, high gain operational amplifier used in data converters. These data converters are used in telecommunication, signal processing and biomedical applications. This work presents the optimized

Design of a novel high gain carbon nanotube based operational transconductance amplifier
free download

Abstract:In this work, design and simulation of novel operational transconductance amplifiers (OTAs) based on carbon nanotubes (CNT) has been performed. Two structures of CNT based OTAs have been proposed and have been compared with a conventional

Low Frequency Filter Design using Operational Transconductance Amplifier
free download

Abstract:-Biomedical signal processing requires low power consumption and low frequency filters. Biomedical signals are usually of 10-mHz to 100-Hz and maximum of 500Hz frequency range. The equipments used in the design of biomedical applications require

OPAMP Design Using Optimized Self-Cascode Structures
free download

A new CMOS analog design methodology using an independently optimized self-cascode (SC) is proposed. This idea is based on the concept of the dual-workfunction-gate MOSFETs, which are equivalent to SC structures. The channel length of the source-side

Related
Operational Amplifier is the most common building blocks of most of the electronics system may not need introduction. They are integral part of many analog and mixed signal systems. Opamps with vastly different level of complexity are used to realize functions ranging from dc bias generation to high gain amplification, filtering or ADCs. The design of opamp continues to pose a challenge as the supply voltage and transistor channel lengths scale down with each generation of CMOS technology. Opamp consists of one or more differential stages and usually followed by additional gain stages depending upon the requirements. Here we discuss regarding the design of two-stage cmos opamp. The paper consists of understanding of specifications and circuit topology of opamp. Design procedures along with one example of opamp design using tsmc 0.25 um technology with single bias supply 2.5V is also given. Finally the simulation results of hspice simulator with comparison of specifications of opamp are given.

current feed back opamp



Low-Voltage Current Feed-back Amplifier
free download

ABSTRACT This paper proposed the new current feed-back amplifier for low supply voltage application. The input stage was designed to be a class-AB circuit and achieve the low supply-voltage operation down to 2VTH+2VDS (SAT). With the self-adjust bias current, the

CFOA-based lossless and lossy inductance simulators
free download

Abstract. Inductance simulator is a useful component in the circuit synthesis theory especially for analog signal processing applications such as filter, chaotic oscillator design, analog phase shifters and cancellation of parasitic element. In this study, new four

Configurable analog block based on CFOA and its application
free download

ABSTRACT A proposed configurable analog block (CAB) is presented, simulated and analyzed. The CAB consists of a CMOS current feedback operational amplifier (CFOA), presented by the authors, as the main active block, programmable four MOS nonlinearity

Comparative Performance of Low Voltage CMOS-CFOA Suitable for Analog VLSI
free download

presented in this paper. The solution works using a low supply voltage and provides a wide input/output swing as well as a high current driving capability. The circuit allows almost a

Single-capacitor-controlled oscillators using a single CFOA
free download

ABSTRACT Single-Resistance-Controlled-Oscillators have been widely investigated in literature because of their several applications, however, it has been largely ignored in the earlier literature that single capacitance controlled type Single Element Controlled

Bandwidth enhancement of inverting amplifier using composite CFOA block
free download

ABSTRACT In this paper, an active compensation method using two current feedback operational amplifiers (CFOAs) to enhance the bandwidth of finite gain inverting voltage amplifier for use as stand-alone amplifier is presented. It is also shown that the

CFOA Based Filter Design Circuit a New Configuration
free download

PK Sinha, A Vikram, KS Yadav iosrjournals.org ABSTRACT In this paper, CFOA based filters are designed and simulated. Filters are electronic circuits typically used for conditioning. As traditional filters consist of passive elements which require larger chip area and consumes more power. Those passive elements are

A MINIMUMCOMPONENT GROUNDED-CAPACITOR CFOA-BASED RC OSCILLATOR
free download

Recently a number of single CFOA-based RC sinusoidal oscillators have been proposed Assuming ideal CFOA characteristics, the minimum number of passive components used, so far, is five. However, by exploiting the CFOA-pole it is possible to obtain a sinusoidal

A Novel Equi-amplitude Quadrature Oscillator Based on CFOA
free download

ABSTRACT This paper presents a single-resistance-controlled sinusoidal equi-amplitude quadrature oscillator based on Current Feedback Operational Amplifier (CFOA) which has potential applications in modulation and detection. Most of the Quadrature Oscillators (QO

Chaos in Modified CFOA-Based Inductorless Sinusoidal Oscillators Using a Diode
free download

ABSTRACT Two modified inductorless sinusoidal oscillators are presented as two chaotic oscillators. The active component employs a current-feedback operational amplifier (CFOA) whereas the nonlinear component employs a simple diode. Numerical and PSpice

Partially active-R grounded-capacitor CFOA-based sinusoidal oscillators
free download

H KHAN 1996 downloads.hindawi.com At present, there is a growing interest in using the current-feedback operational amplifier (CFOA) in various analoge signal processing applications [1-5]. This is attributed to its larger bandwidth andhigher slewrate compared to the conventional voltage feedback opamp research papers

Design of a CMOS fully differential switched-opamp for SC circuits at very low power supply voltages
free download

ABSTRACT This paper presents a fully differential opamp desing based on the switched-opamp approach. The common mode feedback of the proposed opamp only works on the output stage in order to allow a fast turn-on. The opamp was designed in a 0.35 m CMOS

Design of a novel cascoded CMOS opamp with high gain and±1.5 V power supply voltage
free download

ABSTRACT The design of a novel CMOS operational amplifier with two differential input stages is described. Prototype circuits have been fabricated and measured successfully. By using a nested Miller compensation the stability of the operational amplifier is ensured.

OPAMP: Evaluation Framework for Optimal Page Allocation of Hybrid Main Memory Architecture.
free download

ABSTRACT Main memory as a hybrid between DRAM and nonvolatile memory is rapidly considered as a basic building block of computing systems. Despite widely-performed researches no one can confirm whether hybrid memory is at its full performance in terms

Analysis and Measurement of Intrinsic Noise in Op Amp Circuits Part II Introduction to OpampNoise
free download

An important characteristic of noise is its spectral density. Voltage noise spectral density is a measurement of root-mean-square (rms) noise voltage per square root Hertz (or commonly: nV/v Hz). Power spectral density is given in W/Hz. In the previous article we learned that

Basic opamp design and compensation
free download

many opamp design concepts Still used for low voltage applications

A cmos opamp immune to emi with no penalty in baseband operation
free download

ABSTRACT In this paper, a novel CMOS Operational Amplifier input stage which is robust to high power electromagnetic interference (EMI) without any significant penalty in baseband performance is presented and its operation principle is discussed. An opamp which

A Low Power Audio Delta-Sigma Modulator with Opamp-Shared and Opamp-Switched Techniques
free download

ABSTRACT A high power efficient opamp-shared and opamp-switched delta-sigma modulator (DSM) has been presented. It employs a fourth-order single loop 17-level DSM with an input feed forward gain stage. It is shown that power consumption can be largely reduced by

Simulator Based Simplified Design Approach of a CMOS 2-Stage Opamp
free download

ABSTRACT Two stage (Miller) opamp is one of the most commonly used opamp architectures in analog and mixed signal design. This paper presents the design of a Miller opamp using Potential Distribution Methodology (PDM). It is observed that a wide variety of design

A High Performance CMOS Opamp and An LP Filter Design Example For Video Applications
free download

ABSTRACT This paper presents a high performance CMOS opamp. The operational amplifier have a rail to rail input and a class-AB rail to rail output stage. The opamp circuit is simulated using the SPICE program and the performance of the opamp is shown on a high order

A Third Order Delta-Sigma Modulator with Shared Opamp Technique for Wireless Applications
free download

ABSTRACT ² this paper described the design of A third orders delta-sigma modulator (DSM) exploited shared opamp technique in order to reduce number of opamp required, consequently the total power consumption for the modulator decreased as well as

A Design of Three-Stage CMOS Opamp Using Indirect Feedback Compensation Technique
free download

ABSTRACT In the paper, we present a design of a three-stage Operational Amplifier (OPAMP) circuit using Indirect Feedback Compensation technique. Miller Compensation technique is usually used to improve the OPAMP stability. However, the Miller Compensation

Review: OPAMP, Filter Design
free download

G Yuan 2010 course.ee.ust.hk Page 1. 1 Lecture 2 Review: OPAMP, Filter Design George Yuan Hong Kong University of Science and Technology Fall 2010 George Yuan, HKUST Page 2. 2 Outline OPAMP Fundamentals Single-ended OTA Fully-differential OTA Continuous-time Filter

Design of a Low Output Offset Voltage CMOS OpAmp
free download

ABSTRACT In this paper a CMOS single output two stage operational amplifier is presented which operates at 5v power supply at 180nm technology. This op-amp has very low standby power consumption with high driving capabilities and operates at low voltage so that the

Switched Opamp Technique
free download

Circuit Techniques for Low-Voltage and High- 2003 Springer obstacle to the low-voltage operation of standard SC circuits. In Chapter 6 the bootstrapped switches were investigated as a solution for this overdrive problem. Their biggest

Opamp Design Project Help Session
free download



Design of 1V Opamp Using Standard Digital CMOS Technology
free download

ABSTRACT This paper addresses the issues involved in designing 1V Op-amp in standard digital CMOS technology. Bulk-driving technique is used to circumvent the metal–oxide semiconductor field-effect transistor turn-on (threshold) voltage requirement. The Op-amp

ANALYSIS OF THE STABILITY OF KHN BIQUAD, CREATED BY INTEGRATORS IN OPAMP, OTA AND ORA TOPOLOGIES
free download

In this paper, we study the problem of KHN biquad stability. There are presented three variants of this feedback topology with non-ideal integrators, which are made by a feedback system-operational amplifier (OPAMP) and by a feed-forward system-operational

Nonlinear Analyses of Feedback Miller Opamp
free download

56 Design Criteria for Low Distortion in Feedback Opamp Circuits to experience large voltage swing due to the CM-voltage. Thus, the distortion from the output transistors becomes dominant. Both these effects occur at low frequencies. At frequencies above the

Opamp Circuits with High Linearity Performance
free download

In this chapter four opamp circuits are presented, all designed for high linearity performance. Three of the opamps are using the inverting opamp configuration with the CL gain equal to– 1. These are designed using the biasing guidelines of section 3.1 and the design

A Low-Voltage Wide-Bandwidth CMOS OpAmp
free download

A Low-Voltage Wide-Bandwidth CMOS OpAmp with Rail-to-Rail Input in this paper, we used feedforward ABSTRACT A 10 bit opamp-sharing pipeline analog-to-digital converter (ADC) using a novel mirror telescopic operational amplifiers (opamp) with dual nmos differential inputs is presented. Reduction of power and area is achieved by completely merging the front-end

LOW POWER LOW-VOLTAGE CMOS A/D SWITCHED-OPAMP EA MODULATOR FOR BIO-POTENTIAL SIGNALS USING A SINGLE-PHASE SCHEME
free download

Analogueto-digital(AID) interface module for biomedical nppiicalions. This module provides an A/D conversion based on P switchedspamp second-order EA modulator, capable of interfacing with several different types electrical signals existing in the human body, only

Design of a Switched Opamp-based Bandpass Filter in a 0.35 pm CMOS Technology
free download

ABSTRACT A fully differential bandpass lter based on the switchedopamp approach is designed in this work. It was realized in a 0.35 pm CMOS technology, and is able to operate from a Single IV supply voltage with a power drain of 230 W. As a main internal lter

FILTERS WITH SYNTHETIC ELEMENTS OF HIGHER ORDER USING TRANSIMPEDANCEOPAMP
free download

It is possible to use synthetic elements of higher order for development and design of new filter structures . These elements include: a) n-th order two-terminal network type X with impedance »)= lt; v+ X\»+ AV++ A'„a» b) n-th order two-terminal network type D with

Designing of a 10MHz BW 77dB SNDR 8.1 mW Continuous-Time Delta-Sigma Modulator With a Proposed Low Power, Rail-to-Rail Output Swing OPAMP
free download

ABSTRACT The design of a single-loop 4th order 10MHz bandwidth, 320MHz sampling

GAIN IMPROVEMENT OF TWO STAGE OPAMP THROUGH BODY BIAS IN 45nm CMOS TECHNOLOGY
free download

ABSTRACT Gain is an important parameter of an operational amplifier which decide accuracy and speed of it. Number of design techniques (gain boosting, cascoding, cascading etc.) available, which may improve gain of an OPAMP. This paper includes body bias

A Novel High ICMR and High Frequency Response of an Inverting Summing OpAmp
free download

ABSTRACT In this paper, we propose a novel high ICMR (input common mode range) and high frequency response of an inverting summing pomp (operational amplifier). While selecting an operational amplifier for circuit design the most critical parameters must be

A 10.7-MHz Bandpass Sigma-Delta Modulator Using Double-Delay Single-opamp SC Resonator with Double-Sampling
free download

Abstract The design of a 10.7-Ml-[z 4"'-order fs/4 bandpass sigma-delta modulator with a double-delay single-opamp resonator plus double-sampling technique is proposed for GSM standard. The circuit is implemented in 035-1.: m double-poly, triple-metal CMOS process.

Distortion Modeling of Class-AB Opamp with Nonlinear Coefficients Derived by Least Square Method
free download

Abstract The distortion of class-AB operational amplifier is modeled in this paper. The signal path of the class-AB amplifier is approximated by two third-order polynomials with different coefficients. These coefficients can be obtained by exploring the DC characteristics. With

Important opamp configurations
free download

The gain of such a voltage amplifier is rather limited as the gain per transistor can be quite small for nanometer MOST devices. This is why cascodes are better added. Four cascode MOSTs are added M5–8 in series with the input devices and current mirror, as shown in

OPAMP Design Using Optimized Self-Cascode Structures
free download

A new CMOS analog design methodology using an independently optimized self-cascode (SC) is proposed. This idea is based on the concept of the dual-workfunction-gate MOSFETs, which are equivalent to SC structures. The channel length of the source-side

Design of Ultra-Low-Power Single-Switched-Opamp-Based Systems
free download

The trend towards low-voltage low-power single-chip systems has been growing quickly due to the increasing demand of smaller size and longer battery life for portable applications in all market segments including telecommunications, computers and consumer electronics.

Fast Opamp-Free Delta Sigma Modulator
free download

Switched capacitor (SC) circuits are commonly used in integrated circuit (IC) design due to their efficient use of die space, and the ability to accurately construct them on chip. A switched capacitor can be used to realize a large on-chip resistor, saving die area. SC

OpAmp Gain Structure, Frequency Compensation and Stability
free download

Operational Amplifier Speed and Accuracy 2004 Springer OpAmp circuit development starts from the definition of a structure which provides the required gain and speed. Some decisions on the circuit topology may be predetermined. For example, the industry standard of the rail-to-rail output stage means that the output

LVAICD FI AL PROJECT RAIL TO RAIL OPAMP DESIG
free download

In this project, a rail to rail CMOS operational amplifier is designed. Two constant Gmrail to rail input stages were designed in the previous project and a rail to rail output stage is designed in this project. Square root circuit is chosen as the input stage of the OPAMP.

Biasing and Opamp Modeling for Low Distortion
free download

Design Criteria for Low Distortion in Feedback Opamp Circuits etc. To make the circuit robust against these variations it is important to keep the small-signal parameters and nonlinear coefficients relatively constant in the entire range of the terminal voltages of the

AN OPAMP BASED 100W TRIPLE INPUT COMPLEMENTARY AUDIO MIXER AMPLIFIER WITH INDEPENDENT TONE CONTROL
free download

ABSTRACT A triple input complementary audio amplifier mixer with independent tone control was constructed. The construction was carried out using opamps. The circuit was constructed such that each of the three inputs has its tone control. At the output stage, the

Design, Implementation and A Pipeline ADC Using OPAMP Cadence
free download

ABSTRACT In this paper, A 10 bit, 80 MS/s pipeline design using opamp sharing technique. The opamp is between all the consecutive pipeline stages, so that consumption and die area can minimize. The A/D is de implemented and analysed in standard gpdk 18

Design of Ackerberg-Mossberg High Pass Filter with Opamp Using 0.18 µm Technology
free download

AK Kushwaha, D Singar, DS Ajnar, PK Jain ijcns.com ABSTRACT In this paper describes design of operational amplifier and high pass filters of modified type Akerberg-Mossberg with the help of use of the active modern elements. The main purpose to create physical realization of one of these filters which embodies better

TP 4.6: A 900mV 40µW Switched Opamp S Modulator with 77dB Dynamic Range
free download

Portable electronic systems require low-voltage low-power building blocks. An important building block is an A/D converter. S ADCs provide an efficient way of trading off speed for resolution. The switched opamp (SO) technique allows design of switched-capacitor (SC)

1V Sample and hold Circuit Using Switched Opamp
free download

ABSTRACT Sample and hold circuits are usually used to be the front end of the analog circuit. It can transform the continuous time signal to the discrete time signal that is suitable for the sampling of the main circuits. This paper presents a new low voltage sample and hold

Opamp Design
free download

Much of the material presented in this section comes from the text Analog Integrated Circuit to ensure stability during feedback applications. Example design for a process is shown

A Fully On-Chip Gm-Opamp-RC Based Preamplifier Based Preamplifier Based Preamplifier for Electret Electret Condenser Condenser Microphones
free download

Summary An on-chip CMOS preamplifier for direct signal readout from an electret capacitor microphone has been designed with high immunity to common-mode and supply noise. The Gm-Opamp-RC based high impedance preamplifier helps to remove all disadvantages of

ENGPAPER.NET
FREE IEEE PAPERS