Lecture

Operational Amplifiers: Comparators and Oscillators

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

In course

EE-280: Electronics

Présentation des principaux composants de base de l'électronique. Analyse de circuits à base d'amplificateurs opérationnels. Introduction aux circuits logiques élémentaires. Principe de la conversion Analogique-Numérique. Modèles simplifiés des transistors ...

Description

This lecture covers the analysis of operational amplifiers, focusing on comparators and oscillators. It explains the principles behind different types of comparators, such as threshold inverters, and the design and operation of astable multivibrators. The lecture also delves into the characteristics and applications of sinusoidal and square wave oscillators, including the impact of gain-bandwidth product and slew rate on circuit performance.

This video is available exclusively on Mediaspace for a restricted audience. Please log in to MediaSpace to access it if you have the necessary permissions.

Watch on Mediaspace

Instructors (2)

Cédric Meinen

Teaching & PhD Courses Electrical systems and electronics I EE-295 The course has the aim to provide the fundamental knowledge and experiences to understand basic electrical systems. Electrical systems and electronics II EE-296 The basic concepts enabling to understand and analysis the electronic systems dedicated to signals acquisition and processing (e.g. biosensors, physiological signals, ECG) are addressed. This includes the acquisition, amplification and filtering. El

Jean-Michel Sallese

Expertise

Modeling of field effect transistors (Multigate FETs, Junctionless FET, HEMT, Field Effect-based Biosensors).- Modeling substrate parasitic currents in integrated circuits.- Simulation of radiation induced soft errors in integrated circuits- High energy particle solid-state sensors. Mission The mission of the Electron Device Modeling and Technology group is to develop analytical and numerical models (physics based) of emerging semiconductor devices, with particular emphasis on field effect trans

Official source

Ontological neighbourhood

Physics

Electromagnetism: Electrical networks

Related concepts (32)

Relaxation oscillator

In electronics a relaxation oscillator is a nonlinear electronic oscillator circuit that produces a nonsinusoidal repetitive output signal, such as a triangle wave or square wave. The circuit consists of a feedback loop containing a switching device such as a transistor, comparator, relay, op amp, or a negative resistance device like a tunnel diode, that repetitively charges a capacitor or inductor through a resistance until it reaches a threshold level, then discharges it again.

Electronic oscillator

An electronic oscillator is an electronic circuit that produces a periodic, oscillating or alternating current (AC) signal, usually a sine wave, square wave or a triangle wave, powered by a direct current (DC) source. Oscillators are found in many electronic devices, such as radio receivers, television sets, radio and television broadcast transmitters, computers, computer peripherals, cellphones, radar, and many other devices.

Electronics

Electronics is a scientific and engineering discipline that studies and applies the principles of physics to design, create, and operate devices that manipulate electrons and other charged particles. Electronics is a subfield of electrical engineering, but it differs from it in that it focuses on using active devices such as transistors, diodes, and integrated circuits to control and amplify the flow of electric current and to convert it from one form to another, such as from alternating current (AC) to direct current (DC) or from analog to digital.

Multivibrator

A multivibrator is an electronic circuit used to implement a variety of simple two-state devices such as relaxation oscillators, timers, latches and flip-flops. The first multivibrator circuit, the astable multivibrator oscillator, was invented by Henri Abraham and Eugene Bloch during World War I. It consisted of two vacuum tube amplifiers cross-coupled by a resistor-capacitor network. They called their circuit a "multivibrator" because its output waveform was rich in harmonics.

Operational amplifier

An operational amplifier (often op amp or opamp) is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output. In this configuration, an op amp produces an output potential (relative to circuit ground) that is typically 100,000 times larger than the potential difference between its input terminals. The operational amplifier traces its origin and name to analog computers, where they were used to perform mathematical operations in linear, non-linear, and frequency-dependent circuits.

Related lectures (32)

RC Oscillator Circuits: Phase-Shift Oscillator

Explores RC oscillator circuits, focusing on the Phase-Shift oscillator and astable multivibrators, including function generators and timers.

Multivibrators and Function Generators

Explores multivibrators, function generators, nonlinear OPAMP circuits, and timers using practical circuit examples.

OPAMP Non-idealities: Analysis & Applications

Explores the impact of non-idealities in operational amplifiers on amplifier circuits, including frequency-dependent gain and limitations like slew-rate and settling time.

Operational Amplifiers: Fundamentals & Circuits

Explores operational amplifiers' fundamentals, circuits, and non-idealities, including feedback paths and basic OPAMP configurations.

Operational Amplifiers: Basics and Applications