Gain Definition and 417 Threads

ok I'm beginning to read a bit of kant... so what i understand is that we can only GAIN KNOWLEDGE by using concepts and applying it to experiences. it goes to say that we can not know god in this case because we can never experience god? a question someone asked me when i was discussing...

Hi all, Does the antenna gain depend on the angle of the emerging ray? or It can be a single number for all ray emerging in all directions? I know the gain is the amount of power an antenna has relative to an isotropic antenna. Sometimes it means the maximum power an antenna can have relative...

I am learning about Butterworth filters right now, so we are also learning about frequency scaling. To find the new transfer function after you frequency scale something by Kf, you simply divide all 's' by Kf. I am doing a homework problem where you have to find the new location of the poles...

Hi, My name is raju and I am from India. I am in my first year of Degree doing Electronics and Electrical Engineering. I am having a bit of problem with this circuit I am attaching the circuit diagram. Can anyone please tell me what is the gain of the amplifier and how can I found it...

To those who see Israel as an agressor in the ongoing fighting in their region of the world, I ask a straightforward question: What does Israel seek to gain via their continued fighting? Expanding: if the fighting stopped now and Hamas permanently ceased the launching of rockets and...

Post your regrets in life so that other users may gain wisdom from them and not follow your path (if applicable). I'm only in my early 20s so my list is not as full, but here goes. I regret not studying more in my younger years, I was much more interested in video games and popular music. I...

One of the question asks to find the frequency at which the gain becomes 0dB for a low pass Single Time Constant circuit. In the solution manual after finding the 3dB frequency = 10^6, it states that since the gain falls off at a rate of -20dB/dec (see attatchment for graph) starting at...

If a Wankel gasoline engine was to be fitted with a compact and efficient positive displacement additional expander unit such that the normal exhaust from the engine was further expanded down to atmospheric pressure before being released to atmosphere, what gain in thermal efficiency could be...

Hi, Why for arbitrary high input power the gain saturates in EDFA (erbium-doped fiber amplifer)?

Not a homework question, but I was curious because problems in class assumed the object gained electrons versus losing them. Why can't it be the other way around?

Hello, I am trying to understand how this graph http://en.wikipedia.org/wiki/File:Bandwidth_2.svg gets plotted. My goal is to write a small program that takes the center frequency/bandwidth and a (cut/boost) gain values and plot the curve. I initially assumed, all I needed to find was an...

how does one calculate a gain in signal e.g sine wave. do we take peak-to-peak (or peak) of the output divided by peak-to-peak(or peak) of the input?

Over the holiday season I only ate poorly and didn't due my regular exercise for about 8 days. I managed to gain roughly 7 pounds or about a pound per day. It is amazing how fast fat can accumulate on my body yet it can be so hard to get rid of. I even went down about 10 pounds on my usually...

I would like to know somethings about the Q and its relation to gain in a parallel LC circuit. From what I know by tuning the Q to be high you can get a lot of gain at resonant frequency. Also to tune for Q the inductance has to be decreased and the capacitance has to be increased. Is this...

I was reading about a few mission that sent spacecraft s very far from the Earth. Like the Pioneer 10, which went past the asteroid belt, Jupiter, and lost contact with Earth on 2003. I tried to search for, but didn't find what those kind of spacecraft s use to gain speed in the space. I...

Hi, many text about lasers introduces Q switching in detail and just mention gain switch briefly. We know the major difference b/w them is: Q-switching switches the loss from high to low while gain-switching switches the gain from low to high. But the time behavior is quite different in these...

Does anyone know of an experiment or know where I can find an experiment to compare the heat gain or heat loss by a conductor and an insulator?

Hi I was plotting the bode plot for \frac{1}{s^2 + 1} . I found the following bode plot, http://home.iitk.ac.in/~varunag/prob2q1-uncomp.jpg" Here we can see two gain crossover frequencies. Thus two phase margins. On googling, I found this paragraph in a book: Which of the phase margins...

In the midband region the voltage is constant and is assumed to be unity and the transistor amplifier is always used in this region. Doesn’t that mean that there is no voltage gain??

Homework Statement "What is the physical origin of gain in a BJT?" I can figure out gain using gain equations but am having a hard time describing the physical origin of gain in a BJT.. can anyone help?

This is not homework, but a question I have posed for myself. In a linear, passive, 3-terminal RC network for sinusoidal voltage input how many resistors and capacitors are required to give an open-circuit voltage gain of 2? I've found some very complicated networks, but I'd like to find...

Photon can be emitted by an electron's changing of its orbit. As we know. photon always travels at speed c, never less. That means, a phone would acquire its speed c (relative to the electron/atom) instantaneously (i.e., in 0 elapse of time). What physical force could have made such a push? On...

all of the electronics textbooks say that you can make a unity gain buffer out of a non inverting amplifier by making R2 = 0 and R1 = infinity. Why does R1 have to be infinite? The TF for a non inverting amp is 1 + r2/r1, so as long as r2 = 0, and R1 should make a unity gain buffer, right...

Homework Statement How can the open loop voltage gain of an operational amplifier with AC input voltage be determined experimentally? Supply voltage for op amp is +9V. Homework Equations The Attempt at a Solution I'm really stuck here. I would appreciate some outline of...

I have a general interest in fusion energy and I'm currently looking at the 'fusion energy gain factor' (Q) of fusion reactors (the energy produced divided by the energy used to induce ignition). I'm aware that the JET recorded a Q factor of 0.7 in 1997, the ITER is anticipated to have a Q...

Hi, I'm building a STM, and this is the circuit I use : http://www.geocities.com/spm_stm/Simple_STM_Rev_C.PDF I'm right now testing the circuit I build. I build a small part (U3A), and then test it, and build another small part (U3B) and test, then connect the two and test it again...

Assuming your body is an engine which converts matter to energy, and that mass x gravity = weight, still holds true within the human body. How is it possible in a 24 hour peroid to eat 8 oz of food (dry weight) and 16 oz of water (dry weight) and 8 oz of milk (dry weight) and still gain two...

When a person can self-study and gain accreditation through certification exams? Are there examples of such examples in the IT industry, for example? Does the IT industry even care about one's credentials, irrespective of educational background?

Im studying gain saturation for homogeneous and inhomogeneously broaded transitions. Im a little confused bout the logistics of laser operation regarding the gain in the cavity. So from ground state, the atoms are optically pumped to produce population inversion(4 level system) where...

Homework Statement http://img440.imageshack.us/img440/9996/untitledbq0.png Homework Equations Please see picture. The Attempt at a Solution Please see picture. --- I have a strong feeling this is incorrect. I think I'm missing something important here... I don't know what...

Human interaction for personal gain of each individual.Is that the best summary of interaction between individuals.

1. Homework Statement This is all that is given. How much ice must melt at 0 deg. C to gain 6 g of mass? 2. Homework Equations I don't know any Relevant equations to this problem. 3. The Attempt at a Solution I have tried leaving mass as a variable and using Latent Heat...

Homework Statement This is all that is given. How much ice must melt at 0 deg. C to gain 6 g of mass? Homework Equations I don't know any Relevant equations to this problem. The Attempt at a Solution I have tried leaving mass as a variable and using Latent Heat Energys too. I...

Homework Statement How much ice must melt at 0 deg. C to gain 5 g of mass? Latent Heat of Fusion = Homework Equations I cannot seem to find many equations that relate thermodynamics and mass, maybe that is my biggest problem... The only one i could find was Q=Lm The Attempt at a...

I've heard that when an object is accelerated at huge huge speeds they actually gain mass. Is there a formula to see how much mass an object would gain will going a certain velocity.

Hello, I am fighting with a problem from grade 11 chem right now. The problem is why when sulphur bonds to other atoms, its ion charge often becomes 6+ or 2- while magnesium will always form an ion of charge 2+. I think I have an answer but am not sure. Is it because magnesium has a...

This is an experiment I have to do... Using a timer (or watch) and a thermometer, conduct the following experiment to determine the rate of heat gain of your refrigerator. First make sure that the door of the refrigerator is not opened for at least a few hours so that steady operating...

The following is an experiment I have to do: Using a thermometer, measure the temperature of the main food compartment of your refrigerator, and check if it is between 1 and 4°C. Also, measure the temperature of the freezer compartment, and check if it is at the recommended value of -18°C...

Just curious if anyone knows an approximate for the average rate of heat gain for a common fridge? I am going to do an experiment to calculate the average rate of heat gain in my fridge and want to know if my numbers in the ballpark

hi alll! just a quick one. You know when you design a controller - you go and plot the open loop transmission, L(jw) on a nichols plot, where L(jw) = C(jw)H(jw) P(jw) where P and C are the plant and controller respectively. You then 'manipulate' this plot (i.e. vary your controller) until...

Hello, Are there any coil setups for transformers that when tuned or combined in weird ways run with gain? I heard that coupled inductors for CB radio antennas do this, but are there any effects similer to this for transformers? I heard an account from someone who said that two out of tune AC...

hey guys. this has to do with determining the phase and gain margins of a system. i've read and understood the follwing: "To find GM, first find the phase crossover frequency, wGM. This is the frequency where the phase curve passes through -180. Get the magnitude at that frequency...

In the context of detectors of gamma rays, electrons etc. Does the term 'gain of the detection system' mean the ratio of the number of registered counts per bombardment from radioactive source?

A radioactive material emits 2 gamma rays with 2 energies 50 keV and 200 keV with equal probabilities the detector system has a quantum efficiency of 100% and 50% respectively at these 2 energies and the pulse heights are 1.0 mV and 4.0mV respectively. The pulses are input into a 512 channel, 10...

:mad: A radioactive material emits 2 gamma rays with 2 energies 50 keV and 200 keV with equal probabilities the detector system has a quantum efficiency of 100% and 50% respectively at these 2 energies and the pulse heights are 1.0 mV and 4.0mV respectively. The pulses are input into a 512...

Hi i need information about th dbi and dbd... I know what db is but i am trying to understand dbi and dbd... Also i want to know what if the antennas or the tvs antennas has some gain.. I know that the gain refers to the antennas surface... that's why the satellite antennas have a big surface...

We're studying cell signaling and signal transduction in my biology class, and we discussed this briefly in class but I don't really understand it. Why does the affect of a drug decrease the more a person uses it? I don't understand. If someone takes a drug more, wouldn't there be more of the...

Hi all, I've been reading up on control theory, op-amps and other electronics related items. Open loop and closed loop gain keeps poping up and I just can't get a grasp of the concept. Can anyone provide a quick and dirt explanation and maybe an example? Thanks

During pregnancy, a woman's weight naturally increases during the course of the event. When she delivers, her weight immediately decreases by the approximate weight of the child. Suppose that a 120-lb woman gains 27lb during pregnancy, delivers a 7-lb baby, and then, through diet and exercise...

This is an opinion thread, so it doesn't matter where you lean or if you lean at all... what is your suggestion to Junior? I want to stop thrashing his azz for a while... so let's forget about the past mistakes and give feedback and guidance: "what can bushy do now?" I hope not to get...