Precision Rectifier.

Slides:



Advertisements
Similar presentations
Kazi Md. Shahiduzzaman Lecturer, EEE,NUB
Advertisements

Chapter 7 Operational-Amplifier and its Applications
ENTC 3320 Absolute Value.
To Get a Perfect “A”… An Engr. 311 Project by Corrin Meyer.
Describe and analyze the operation of several types of comparator circuits. Describe and analyze the operation of several types of summing amplifiers.
Diode Applications Half wave rectifier and equivalent circuit with piece-wise linear model Ideal Vc Rf vi v i = VM sin (t)
Non-Ideal Characteristics Input impedance Output impedance Frequency response Slew rate Saturation Bias current Offset voltage.
Wien-Bridge Oscillator Circuits. Why Look At the Wien-Bridge? It generates an oscillatory output signal without having any input source.
Waveform-Shaping Circuits
Oscillators With the addition of a capacitor and resistor, the Schmitt trigger can be turned into a simple oscillator. Technically, it’s known as an astable.
More Non-Ideal Properties Bias Current Offset Voltage Saturation Applications of saturation.
Department of Information Engineering357 Operation amplifier The tail, large impedance gives high CMRR Mirror as active load. High gain Follower as buffer.
CMPE 118 MECHATRONICS Operational Amplifiers (OpAmps) and Comparators Signal Conditioning, Buffering, Etc.
Operational Amplifiers
Schmitt trigger.
Astable multivibrators I
EKT214 - ANALOG ELECTRONIC CIRCUIT II
Op. Amps Applications. SJTU Zhou Lingling2 The Inverting Configuration.
Content Op-amp Application Introduction Inverting Amplifier
Chapter 8 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Electronic Devices Ninth Edition Floyd Chapter 13.
Integrator Op Amp Amplifier
Operational amplifier applications
RECTIFICATION Normal household power is AC while batteries provide DC, and converting from AC to DC is called rectification. Diodes are used so commonly.
Diode Circuits. Voltage Regulation Rectifier Circuit.
Differential Amplifier
CHAPTER 11 Op-Amp Applications. Objectives Describe and Analyze: Audio mixers Integrators Differentiators Peak detectors Comparators Other applications.
Operational Amplifier
Operational Amplifiers. What is an Op Amp? High voltage gain IC with differential inputs –Designed to have characteristics near ideal Inexpensive, widely.
Microelectronic Circuits, Sixth Edition Sedra/Smith Copyright © 2010 by Oxford University Press, Inc. C H A P T E R 02 Operational Amplifiers.
Dynamic Presentation of Key Concepts Module 5 – Part 1 Fundamentals of Operational Amplifiers Filename: DPKC_Mod05_Part01.ppt.
1 Fundamentals of Microelectronics  CH1 Why Microelectronics?  CH2 Basic Physics of Semiconductors  CH3 Diode Circuits  CH4 Physics of Bipolar Transistors.
Diode: Application Half-Wave Rectifier
EE 1270 Introduction to Electric Circuits Suketu Naik 0 EE 1270: Introduction to Electric Circuits Lecture 13: Operational Amplifiers Part 1 Chapter 5.
Chapter 6 Voltage Regulators By En. Rosemizi Bin Abd Rahim EMT212 – Analog Electronic II.
Half Wave rectifier Full wave rectifier Mathematical Examples
Operational Amplifier. What is an Operational Amplifier? 1)Differential amplifier - amplifies difference between two signals. 2)Can amplify very small.
Non - Inverting Amplifier
Operational Amplifier The operational amplifier circuit first came into existence as a basic building block in analog computers. I t was referred to as.
CHEM*3440 Operational Amplifiers These integrated circuits form the backbone of modern instrumental methods. Understanding their operation will help you.
Operational Amplifiers Op Amps – a useful building block K. El-Ayat 11.
Applications of OP-AMP. Introduction Operational amplifier using IC's is inexpensive, versatile and easy to use. For this reason they are used not only.
SAMPLE AND HOLD CIRCUIT. CIRCUIT CONSTRUCTION The circuit samples the input and holds the last sample until the input sampled again. The circuit has an.
EMT212 – Analog Electronic II
Lab Experiment: 2 Objectives: To understand the diode’s characteristics. Construct the Full wave bridge rectifier. Explain it’s wave form. Name of the.
Diode Rectifier Circuits Section 4.5. In this Lecture, we will:  Determine the operation and characteristics of diode rectifier circuits, which is the.
1 COMPARATORS Function: Compares two input voltages and produces an output in either of two states indicating the greater than or less than relationship.
OP-AMPs Op Amp is short for operational amplifier. An operational amplifier is modeled as a voltage controlled voltage source. An operational amplifier.
3/19/2016 Subject Name: LINEAR IC’s AND APPLICATIONS Subject Code:10EC46 Prepared By: Kumutha A Department: Electronics and Communication Date:
Reverse Parking Sensor Circuit.
مكبر العمليات Operational Amplifier Operational Amplifier and its circuit. Types of op-amp. Application of op- amp. Examples Operational Amplifier.
Schmitt Trigger Circuits. Op Amps Previously in ET1 we investigated the Operational Amplifier. The Op Amp consisted of V in V out A feedback loop O V.
NON LINEAR IC APPLICATION USING OP AMP NAME:- ROLL NO. ROHAN V. KHRISTI 14ELEE310 AFJAL A. RATHOD 14ELEE311 NIKUNJ K. PARMAR 14ELEE312 SUB :- ANALOG ELECTRONIC.
1 UNIT –V Signal Generators and Waveform- Shaping Circuits.
CSE251 Diode Applications – Rectifier Circuits. 2 Block diagram of a DC power supply. One of the most important applications of diodes is in the design.
Full Wave Rectifier Circuit with Working Theory
5-3-2 The Emitter Follower. Learning Objectives: At the end of this topic you will be able to;
Op-amp Comparators part I of 3
ELEC I.G.A.I.JAYAWEERA PS/2014/134. Intro ducti on What is an Operational Amplifier?
Voltage Doublers A voltage doubler provides an output that is twice its peak input voltage.
Absolute Value.
C.K.PITHAWALA INSTITUTE OF MANAGEMENT
Made By :- Shivani Srivastava, binal Vaghela ENROLLMENT NO: , SEM :-3rd branch :- E.C.
AC Inlet & AC Input Filter
Fault detection Lecture (3).
Non-linear Op-Amp Circuits Tim. Content 1 Introduction 2 Zero Crossing Detector – 2.1 Non-Inverting Zero Crossing Detector 2.1 Non-Inverting Zero Crossing.
Wave Generation and Shaping
Wien-Bridge Oscillator Circuits
ELEC207 Linear Integrated Circuits
Presentation transcript:

Precision Rectifier

Introduction The precision rectifier is also known as a super diode. It is a configuration obtained with an operational amplifier in order to have a circuit behaving like an ideal diode and rectifier. It can be useful for high-precision signal processing.

Precision Rectifier

Basic Circuit The basic circuit implementing such a feature is shown on the right, where RL can be any load.

Basic circuit of precision rectifier

Cont., When the input voltage is negative, there is a negative voltage on the diode, too, so it works like an open circuit, there is no current in the load and the output voltage is zero.

Cont., When the input is positive, it is amplified by the operational amplifier and it turns the diode on. There is current in the load and, because of the feedback, the output voltage is equal to the input.

Circuit Diagram

Cont., In fact the threshold of the super diode is not actually zero, as it should be for an ideal one, but it equals the threshold of the normal diode divided by the gain of the operational amplifier, that is almost zero.

Saturation When the input becomes negative, the output of the operational amplifier can easily become greater than the voltage supplied to the op-amp, thus causing saturation.

Cont., If the input becomes positive again, the op-amp has to get out of the saturation to amplify again. This change takes some time, and this greatly reduces the frequency response of the circuit.

Improved Precision Rectifier circuit

Precision Half wave Rectifier

Precision Full wave Rectifier

Peak detector With little modifications basic precision rectifier can be used also for detecting peak levels of signal. In the following circuit a capacitor keeps the peak voltage level of signal and switch can be used for resetting detected level.

Peak detector

The End ……. Thank You …….