Control theory | Ordinary differential equations | Dynamical systems

Parasitic oscillation

Parasitic oscillation is an undesirable electronic oscillation (cyclic variation in output voltage or current) in an electronic or digital device. It is often caused by feedback in an amplifying device. The problem occurs notably in RF, audio, and other electronic amplifiers as well as in digital signal processing. It is one of the fundamental issues addressed by control theory. Parasitic oscillation is undesirable for several reasons. The oscillations may be coupled into other circuits or radiate as radio waves, causing electromagnetic interference (EMI) to other devices. In audio systems, parasitic oscillations can sometimes be heard as annoying sounds in the speakers or earphones. The oscillations waste power and may cause undesirable heating. For example, an audio power amplifier that goes into parasitic oscillation may generate enough power to damage connected speakers. A circuit that is oscillating will not amplify linearly, so desired signals passing through the stage will be distorted. In digital circuits, parasitic oscillations may only occur on particular logic transitions and may result in erratic operation of subsequent stages; for example, a counter stage may see many spurious pulses and count erratically. (Wikipedia).

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AWESOME Electromagnetic force oscillation!!!

In this video i show electromagnetic force oscillation on a ruler. Also i demonstrate the standing wave on a ruler!

From playlist ELECTROMAGNETISM

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Βy which factors the oscillation period depends!

The oscillation period in simple harmonic motion!

From playlist MECHANICS

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B03 Simple harmonic oscillation

Explaining simple (idealised) harmonic oscillation, through a second-order ordinary differential equation.

From playlist Physics ONE

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Forced Harmonic Motion: Solution (5.6)

In this video, I find the particular solution to the equation of motion for a driven damped harmonic oscillator.

From playlist Intermediate Classical Mechanics

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B04 Example problem of simple harmonic oscillation

Solving an example problem of simple harmonic oscillation, which requires calculating the solution to a second order ordinary differential equation.

From playlist Physics ONE

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B06 Types of damped harmonic motion

Explaining the types of damped harmonic oscillation. These are underdamped, critically damped, and under damped, depending on the types of roots calculated when solving the second order linear ordinary differential equation that results from introducing the retarding force.

From playlist Physics ONE

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Cross Coupled Pair Oscillator Part 2

https://www.patreon.com/edmundsj If you want to see more of these videos, or would like to say thanks for this one, the best way you can do that is by becoming a patron - see the link above :). And a huge thank you to all my existing patrons - you make these videos possible. In this video

From playlist RF Amplifier Design

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Metapopulation dynamics and heterogeneity by Somdatta Sinha

Dynamics of Complex Systems - 2017 DATES: 10 May 2017 to 08 July 2017 VENUE: Madhava Lecture Hall, ICTS Bangalore This Summer Program on Dynamics of Complex Systems is second in the series. The theme for the program this year is Mathematical Biology. Over the past decades, the focus o

From playlist Dynamics of Complex Systems - 2017

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EEVblog #95 - Linear Regulators, Closed Loops, Simulations, & Brand Shenanigans

A bit of a follow-on from the linear regular episode. Dave dances with a simple linear closed loop circuit he built, and bodges it up in LTspice to get a remarkably consistent result. Not really a tutorial, just a few random tidbits.

From playlist Power Supply Design

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EEVblog #1085 - Bypass Capacitors Visualised!

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From playlist PCB Design & Manufacture

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EEVblog #629 - How To Design a Microphone Preamplifier

Part 7 of Microphone Technology with Doug Ford, former head designer at Rode Microphones. This video Doug takes you through the design of the Rode NT3 and NT1000 microphone designs. There is a ton of stuff in here: Closed loop unity gain JFET and bipolar follow circuits. Bootstrapping out

From playlist Microphone Technology & Design

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EEVblog 1409 - The DANGERS of Inductor Back EMF

A practical demonstration of Lenz's law and back EMF in an inductive relay coil and how to solve it using a Freewheeling/Flywheel/Flyback/Snubber/Clamp diode. Also the downsides of clamping diodes, and switch arcing supression. Also a look at an AMAZING potential phenomenon you probably ha

From playlist Electronics Tutorial - DC Fundamentals

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Damped oscillation!!!

In this video i demonstrate Underdamped, Critically Damped, and Overdamped. I use ruler magnets and aluminum (pendulum). Magnet moves near aluminum and Foucault currents stop smooth the pendulum.

From playlist MECHANICS

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10/20/12 Richard Baxter - Of Men, Mosquitoes and Malaria

Richard Baxter - Of Men Mosquitoes and Malaria: Understanding Transmission of Global Disease Science on Saturdays is a special lecture series designed for families that brings the excitement of research and the passion of scientists to school-age children in the New Haven area. The lectur

From playlist Science on Saturday at Yale

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ELEC2141 Digital Circuit Design - Lecture 30

ELEC2141 Week 11 Lecture 2: Guest Lecture

From playlist ELEC2141 Digital Circuit Design

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Population Regulation: Separate Generations Part 1 - Mathematical Ideas in Biology

In this video I try to explain the fundamental mathematics behind Population Regulation in separate generations. The motivation for this is that, in the upcoming videos, we wish to build on top of our current results to be able to analyze factors influencing population numbers, such as pre

From playlist Summer of Math Exposition Youtube Videos

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AWESOME Eddy currents!!!

Eddy currents are currents which circulate in conductors like swirling eddies in a stream. They are induced by changing magnetic fields and flow in closed loops, perpendicular to the plane of the magnetic field. They can be created when a conductor is moving through a magnetic field, or wh

From playlist ELECTROMAGNETISM

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Energy Harvesting for Wireless Sensors

May 30, 2007 lecture by Raj Amirtharajah for the Stanford University Computer Systems Colloquium (EE 380). In this talk, Raj gives an overview of energy harvesting mechanisms, describes circuit and system microarchitecture techniques for energy harvesting wireless sensors, and gives speci

From playlist Course | Computer Systems Laboratory Colloquium (2006-2007)

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