Gain Definition and 417 Threads

Hello, I can't figure out what's the difference between the two: Gain - how much the amplitude of the signal was increased/decreased Amplification - how much the amplitude of the signal was increased/decreased If we take a basic inverting amplifier circuit: http://alturl.com/39n78 We...

I’m in the process of writing a lab report after testing a cascaded common-emitter amp. The second transistor input is the collector output (collector to base) which I understand to be an emitter follower? I have used PSPICE to measure the gain when a 20mV signal is applied and I have...

Hi guys! I was wondering if anyone knew of a particularly nice book that taught one how to solve physics problems that need the use of green's functions and/or spherical harmonics. I can't seem to find a book that actually does this other than Jackson but I'd rather not tread there (I'm guessing...

What is meant by achieving "full diversity gain over Rayleigh fading channel"?

Homework Statement Here is the system I am looking at Homework Equations So I worked out a formula for the steady state error and put it in a form similar to masons gain formula The Attempt at a Solution But when I try and draw a block diagram and work out e I get...

Hi, I'm trying to put a long open-ended debate to rest. For those who don't know, the EGR, Exhaust Gas Recirculation, system takes some of the exhaust gas and reintroduces it into the intake manifold. From what I understand, at 1600°C NOx is formed because air molecules, nitrogen N2 and...

Homework Statement We got the following circuit: http://tinypic.com/view.php?pic=1zl7xg2&s=6 u_in is input u_ut is output The Attempt at a Solution I assumed that the upper amp has voltage u_in on the positive terminal. And that the lower amp has voltage 0 V on the...

Every schoolboy knows that a principal reason that nobody or no thing can go faster than the speed of light is that we gain mass at relativistic speeds approaching c. However, I have yet to find an explanation as to how that mass gain manifests itself in the accelerating body. Say we have a...

Homework Statement When calculating the overall gain of a two-stage pass-band filter, can one simply add the gain from the high-pass filter (R1/C1) to the gain from the low-pass filter (R2/C2)? Homework Equations N/A. The Attempt at a Solution For example, if the gain from the high-pass...

Homework Statement Suppose you are given an ideal op amp, an ideal voltage source with voltage Vs, 5 resistors with resistance R, and one variable resistor whose resistance can be adjusts continuously between .2R and R. Use these components to design a circuit, assuming ideal op-amp behavior...

I have the set of values for resistors available: 10-12-15-18-22-27-33-39-47-56-68-82 And I need to get a gain of 15, which values should I use to get this? Also, I have a non-inverting amplifier, and again, I need a gain of 15. I selected the values: R2=12 and R1= 68+82+18=168 I assumed I was...

Homework Statement Homework Equations I have two "golden rules" I was given which are "no current into the op-amp" and V_{-} = V_{+} and the open loop gain is infinite Basically my notes and textbooks are leaving me with pretty much nothing though The Attempt at a Solution tried...

Homework Statement Okay, so I know that I have to find the gain of the negative feedback part (1+ R2/R1). But then to find the transfer function of the bottom part of the oscillator, would the resistor and capacitor that are attached to the '+' terminal of the op amp be considered in...

control system -- open loop transfer function and open loop gain Is there any difference between open loop transfer function and open loop gain ?

This is the Bode plot of a Broadband Bandreject Op Amp amplifier. The exercise says this: I know that in order to get both cutoff frequencies I need to subtract 3 dB from the plot, but how do I get the gain? I would think that the gain is 3 dB because it is also the distance between the top of...

An amplifier increases the peak-to-peak voltage of a signal from 1 V to 20 V. What is the amplifier's gain in dB? dB = 20 log10 (Vout/Vin) In this case dB = 20 log10 (20/1) I'm not sure :/

Homework Statement If a round trip gain in a 56.8 cm long laser is 5.16%, what is the net gain coefficient (g-\alpha). g is the small signal gain coefficient \alpha is the absorption coefficient L-length of cavity Homework Equations The Round Trip Power Gain: Gr= R1*R2*...

So during neutron scattering in a crystal, a neutron can interact with 0, 1, or more phonons. First of all, what is the actual mechanism by which they interact? My textbook just kind of glosses over that. Second of all, when a neutron goes in it can absorb a phonon and come out with more...

What steps I have to follow to find the DC gain of the second order system with a transfer function ? Putting "0" where I see "s" or taking the limit as "s" goes to infinite ?

Can anyone tell me how to find the gain bandwidth product from bode plot of a unity gain circuit for the attached bode plot? I hv attached the circuit and bode plot ...

i have attached a bode plot and the opamp dc second order lpf circuit. the opamp Tl082 has a gain bandwidth product of 4Mhz according to the datasheet. this circuit has a bandwidth of 414.25khz. can we determine the opamp' individual gain-bandwidth product from this plot ?? if yes , how do we...

Hi all, I have a very basic doubt. If we have an amplifier with voltage gain A = Vo/Vi , where Vo is output and Vi is input voltages and Ap = Po/Pi which is power gain. Ap = Po/Pi = Vo^2/Vi^2 = (Vo/Vi)^2 In decibels powergain = 10 log (Po/Pi) = 20 log (Vo/Vi). In most tech...

http://imgur.com/K5nPY a) Determine the voltage gain of the amplifier, Vout / Vin, in terms of the parameters in the given circuit. b) Determine the overall voltage gain between the source and the output, Vout / Vsourse, in terms of the parameters in the given circuit. Attempt at...

So the goal in this case is to find k, the gain of the dependent source shown as a diamond. Formula for dependent voltage sources: V=g*V0 In this case V=k*Va I would get a negative value for k, because k=V/Va=-10V/(0.2A*10Ω)=-5 But can you have a negative value for k? Is that possible? Or...

Homework Statement I've been reviewing my electrical theory and I'm having trouble trying to calculate an expression for the voltage gain for these two specific circuits. (Images c and d of the question.png attachment). I already know the answers, however I am unable to derive the same...

The block diagram (attached) shows the control of an electric heating system. The heater is driven from a voltage-controlled power supply, the voltage V1 being derived from a potientiometer. The output temperature, θO, is subject to disturbances, θD, because of changes in the ambient...

Hello, I was wondering if someone might be able to explain these terms. Specifically, the difference between them. From what I have read they seem to describe the same thing, i.e. the enthalpy change involved in: X(g) + e- → X-(g) I am sure there is a difference that I am just not...

Hello, Chitose here Just as the topic said, I'm I right? to believe that our body never gain weight more than weight of food we eat (and drink). 'cause mass won't come from nothing. we eat 100g of food, when it came out is less than that, part of it become our body mass (weight, height...

Ionization Enthalpy is defined as the amount of energy required to remove an atom's electron (can be valence or consecutive) ... this definition doesn't sound so complex. The definition of Electron Gain Enthalpy - it is the amount of energy required to add an electron. But, what is Electron...

I know the transfer function = Laplace{output}/Laplace{input}, while gain = output/input, but why is that matter? The ratio will still be the same (or is it?). And if there is a distinct different, is the result of the mason's formula using signal-flow graph a gain or a transfer function...

This is my first post here. I'm currently learning about Negative feedback. Normally, When we want to know the open loop gain, we rewrite circuit(a) to circuit(b). My question is why do RE1,RF,RE2 from circuit(a) turn into what we see circuit(b)? what is a theory behind this? In...

Homework Statement If a transistor circuit is used to amplify a 2.5 mA signal to at least 0.1 A, what must be the minimum gain of the transistor circuit? b. Assume the amplifier consists of a number of transistors in series, each with a gain of 10. How many transistors are needed in...

The title is a bit deceptive but I've been very curious about something that many people who diet have found. Over the course of a few months, I was losing weight at a steady pace of 2lb/week. At one point I decided to make the most of my gym membership and start doing resistance training as...

Why when two charged conductors connected by a conducting wire gain the same potential . Lets say we have two spheres of different charges why when we connect them by a single copper wire they gain the same potential Thanks in advance

Homework Statement http://img706.imageshack.us/img706/263/hwstatement.png Homework Equations KCL/Node voltage method Ideal op-amp rules The Attempt at a Solution I solved a previous, similar problem where the gain was fixed and the resistor mass going into the inverting and noninverting...

What is effect on closed loop when one has unity gain at the center of the pass band for an open loop ? Is this desirable? If not how could situation be improved? Are there any consequences for the suggested improvement?

To start I have attached an image of the circuit. We are to relate the V_{0}to V_{s}. I am not exactly sure where to start with it. I know that V_{-} and the V_{+} on the op amp have to have the same voltage. The resistor that bridges the two inputs is throwing me off. Not sure if this is the...

Homework Statement A helium-neon (He-Ne) laser has a gain bandwidth (denoted here as the frequency interval over which the laser gain equals or exceeds the minimum threshold gain) given by ΔG= 1.0 GHz, centred on the λ = 632.8 nm emission wavelength. Show that in order to tune the...

can someone please tell me how did they derive with the above equation? my point of view: Vgs = Vin Vds = Vout so how did they even get Vgs = Vds? below shows the Small signal circuit: might be a stupid question to ask. but i am really confuse on when to look at the original circuit, when...

I am going through some notes on a very simple BJT circuit setup as a voltage follower. It is simply an NPN with its collector connected to a voltage source, its base connected to a signal, and its emitter connected to a load resistor to ground. A schematic is attached. Now he setup a...

I need help on how to cascade two or three Jfet transistor and the calculation of the values to have a good amount of gain. The cascade also should help in providing good linearity, have less distortion and should stable good stability.Thanks, good help will really be appreciated by me.

Would it be possible to get the Transfer Function of a System if Open Loop Gain Margin and Phase Margin are known.

I understand how gravity can affect photons or light waves (Einstein's equivalence principle). But I was wondering if there are any theories that predict that a photon might somehow acquire mass in the presence of a singularity.

I have a circuit which i designed to have gain around 60dB unfortunately when I tried it out the circuit's gain falls short around 30 dB. and also when i tried it out with electrode, the circuit's gain got lower than 25 dB. My problem is what are the reasons that cause this problem and if I...

I was wondering if a projectile can be introduced to a Gauss-field and pick up kinetic energy when initial speed before coil were about 1000 fps. Or if the ironmass have to be initially fired from the same discharge\stream of flux to gain any speed. And least, would the Gauss-field slow the...

I'm stuck on what I'm sure is a very simple problem. I'm trying to calculate predicted output for my share trading model. For example, for a strategy the probability of it winning on each trade may be 0.4 and hence a loss is 0.6. But for each trade it wins, my account balance is...

Please correct me if I am wrong, as I have little more than a high school knowledge of physics until I start at university this year - virtually no knowledge of the quantum side of things just yet. ^^ My thought is, as spaghetification occurs as you approach the centre (not using singularity...

Homework Statement Hi, I am trying to use pspice student to work out a ideal opamp. This is what i did: Homework Equations I have find out the gain for my opamp using simulation. But the problem is how can i find out the DC open loop gain using this software? i have google it and it just...

I'm not nearly as good at laboratory work as I'd like to be. I'm therefore searching for a book (or books) that describe, at an introductory level, the following topics: - Methods of using computer code to interface with hardware (e.g. using GPIB/IEEE addresses to extract information from...

It may superficially sound like a stupid question with a simple answer, but let me explain in more depth. Calories are units of energy, as you probably know, and grams are the the weight of the food. So calories are not directly related to the weight of a food. Foods range in the amount of...