In electronics, gain is a measure of the ability of a two-port circuit (often an amplifier) to increase the power or amplitude of a signal from the input to the output port by adding energy converted from some power supply to the signal. It is usually defined as the mean ratio of the signal amplitude or power at the output port to the amplitude or power at the input port. It is often expressed using the logarithmic decibel (dB) units ("dB gain"). A gain greater than one (greater than zero dB), that is amplification, is the defining property of an active component or circuit, while a passive circuit will have a gain of less than one. The term gain alone is ambiguous, and can refer to the ratio of output to input voltage (voltage gain), current (current gain) or electric power (power gain). In the field of audio and general purpose amplifiers, especially operational amplifiers, the term usually refers to voltage gain, but in radio frequency amplifiers it usually refers to power gain. Furthermore, the term gain is also applied in systems such as sensors where the input and output have different units; in such cases the gain units must be specified, as in "5 microvolts per photon" for the responsivity of a photosensor. The "gain" of a bipolar transistor normally refers to forward current transfer ratio, either hFE ("beta", the static ratio of Ic divided by Ib at some operating point), or sometimes hfe (the small-signal current gain, the slope of the graph of Ic against Ib at a point). The gain of an electronic device or circuit generally varies with the frequency of the applied signal. Unless otherwise stated, the term refers to the gain for frequencies in the passband, the intended operating frequency range of the equipment. The term gain has a different meaning in antenna design; antenna gain is the ratio of radiation intensity from a directional antenna to (mean radiation intensity from a lossless antenna). (Wikipedia).
In this video we discuss the DC gain of a dynamic system. Topics and time stamps: (0:12) – Introduction to DC gain (7:04) – Derivation of DC gain (11:49) – Relationship between DC gain and steady state error (15:31) – Example of DC gain of a mass, spring, damper Additional videos in this
From playlist Control Theory
How To Calculate The Voltage Gain of a Transistor Amplifier
This electronics video tutorial explains how to calculate the voltage gain of a transistor amplifier. It explains how to calculate the base current of an emitter feedback bias circuit and a voltage divider bias circuit which is useful in calculating the AC emitter resistance of the circui
From playlist Electronic Circuits
Electronic measurement equipment and multimeters-Part 6: AC Power measurement issues / Power Factor
This is a response to a comment about issues measuring AC power consumption. I try and show how power factor can be a challenge in the measurement of AC power consumption especially with a multimeter. View this other video as well for a better understanding of power factor and its issues:
From playlist Electronic Measurement Equipment
Electrical Engineering: Ch 19: Fourier Transform (2 of 45) What is a Fourier Transform? Math Def
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the mathematical definition and equation of a Fourier transform. Next video in this series can be seen at: https://youtu.be/yl6RtWp7y4k
From playlist ELECTRICAL ENGINEERING 18: THE FOURIER TRANSFORM
Electrical Engineering: Ch 15: Frequency Response (16 of 56) The Decibel Scale for Voltage & Current
Visit http://ilectureonline.com for more math and science lectures! In the previous video we calculated the gain of a transfer function in terms of the decibel scale where G=10log(P2/P1) and now we will find that G=20log(V2/V1) and G=20log(I2/I1). http://www.ilectureonline.com/donate htt
From playlist ELECTRICAL ENGINEERING 15 FREQUENCY RESPONSE
Capacitors (9 of 9) Graphical Determination of Capacitance
This video describes how to graphically determine the capacitance of a capacitor. First, five data points are collected, each data point consists of the potential difference across the capacitor and the charge on the plates of the capacitor. Next the data points are plotted on a graph of
From playlist Capacitors and Capacitance
Electrical Engineering: Ch 15: Frequency Response (1 of 56) What is a Transfer Function? 1 of 3
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is a transfer function – the frequency dependent ratio (represented by a number between 0 and 1) of the output vs input voltage (or current). http://www.ilectureonline.com/donate https:/
From playlist ELECTRICAL ENGINEERING 15 FREQUENCY RESPONSE
Electronic measurement equipment and multimeters - Part 1
In this video series I show different measurement equipment (multimeters, etc) and why / how I use them. In later videos I'll explore different features and highlight pro's and con's. A list of my multimeters can be purchased here: http://astore.amazon.com/m0711-20?_encoding=UTF8&node=
From playlist Electronic Measurement Equipment
This electronics video tutorial provides a basic introduction into voltage. It defines voltage as the electromotive force or potential difference acting between two points. It the work done by a coulomb of charge as it flows from one point to another point. Subscribe: https://www.youtub
From playlist Electronic Circuits
Atomic Structure (5 of 6) What are Ions? An Explanation
In this video Mr. Swarthout explains what ions are, including cation and anions, how atoms become ions and how to use the periodic table to determine the charge of ions. You can see a listing of all my videos at my website, http://www.stepbystepscience.com An atom is the smallest constitu
From playlist Atoms, Isotopes and Ions
Oxidation and reduction review from biological point-of-view | Biomolecules | MCAT | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/v/oxidation-and-reduction-from-biological-view Taking a look at oxidation and reduct
From playlist Cellular respiration | Biology | Khan Academy
IONIC BONDING - All You Need To Know! | GCSE & IGCSE Chemistry
Science with Hazel's Perfect Answer Revision Guides are available at www.sciencewithhazel.co.uk I've updated my ionic bonding video to include the following: - How to draw dot cross diagrams - How to recognise an ionic bond - How ionic bonds form between a metal and a non-metal These vid
From playlist GCSE & IGCSE Chemistry Revision //
What Are Ions | Properties of Matter | Chemistry | FuseSchool
What Are Ions | Properties of Matter | Chemistry | FuseSchool What is an ion? What role does it have to play in the structure of atoms? Watch this video to find out! JOIN US ON PATREON https://www.patreon.com/fuseschool SUBSCRIBE to the FuseSchool YouTube channel for many more educati
From playlist CHEMISTRY
Oxidation and reduction in cellular respiration | Biology | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/intro-to-cellular-respiration/v/oxidation-and-reduction-in-cellular-respiration Oxidation and reduction in cellula
From playlist Cellular respiration | Biology | Khan Academy
This biology video tutorial provides a basic introduction into cellular respiration. It covers the 4 principal stages of cellular respiration such as glycolysis, pyruvate oxidation, the kreb’s cycle, and the electron transport chain. It also covers anaerobic cellular respiration such as
From playlist Biology
Photonic and Electronic Properties in Quantum Dot Circuit-QED Systems by Bijay Kumar Agarwalla
PROGRAM NON-HERMITIAN PHYSICS (ONLINE) ORGANIZERS: Manas Kulkarni (ICTS, India) and Bhabani Prasad Mandal (Banaras Hindu University, India) DATE: 22 March 2021 to 26 March 2021 VENUE: Online Non-Hermitian Systems / Open Quantum Systems are not only of fundamental interest in physics a
From playlist Non-Hermitian Physics (ONLINE)
Light and Optics 8_1 Diffraction and Resolving Power
Diffraction and resolving power.
From playlist Physics - Light and Optics