Recent content by engineer_ja

Right, I'll have to work through that but it seems to make sense. Thanks for the help!

Hi, this isn't real life, its a textbook question. The question started with identifying the class of amplifier and then finding Ib for hFE=50 and VBE=0.7 for no input supplied. this comes out as 105 muA. Then using small signal parameters calculate small signal gain and voltage. This again...

Attachment Image was .tiff so didn't attach, here is a jpeg.

Homework Statement For the attached emitter follower circuit, calculate the maximum ac power (Sinusoidal signal) delivered to an attached load. I have already calculated Rout of the circuit as 19.2Ω, and the voltage at the emitter at operating point (no input signal) as 10.7V (I know...

Excellent, Thank you very much! Matlab does perform LU on this matrix, but uses partial pivoting to give PA=LU I just checked, and singular value decomposition is covered at the end of his terms course. ;) Thanks once again for the clear detailed answers.

Hi, thanks! Im using Matlab (But did the above example by hand without partial pivoting), and yes, I'm an engineering student (general currently). Im studying linear algebra as part of a maths course, applicable to the general solving of simultaneous equations and computer programming etc. the...

Hi, Thanks very much, I thought it was something like that. So am I correct in saying the row space part lies only in the row space, and the null space part of x_0 is just a linear combination of the null space basis that gives zero (i.e. is redundant) when multiplied, but produces "nice"...

Hi, My textbooks say that when a solution, x, is found to Ax=b it has a particular solution, x_0, such that A*x_0=b which is then combined with other solutions from the null space, n_i, such that A*n_i=0. However, when playing about with this I seem to have come across a problem. for...

OK, Thanks for your help. I have managed to locate and change the working directory, so have now found my file. This is just a one-off data collection function that I'm adding in, so I'm not to worried about it slowing the program down, but have altered it to work every 10 time steps to avoid...

I am using a verlet algorithm in c++ to model the motion of a satellite, and want to output position and velocity data from each timestep so that I can then read it into MATLAB and plot graphs to see how well my model matches the 'real life' graphs. so far I have at the end of each iteration...

sorry file didn't attach!

Thanks Guys, @SC, that approach worked for me when I tried, but the answers gave this as an equivalent circuit, and I can't work out how they got there...!

Hi, I've attached the circuit picture. To find current in xx I convert the 2 voltages to norton equivalents. Can I then combine the 2A with the left hand current source, ignoring its 5 ohm series resistance?? I then think that I cannot combine the left hand and right hand norton equivalents...

Thanks! How do I know if I can ignore the resistance? The question I am trying to do asks for the current in a particular wire of the circuit. Looking at my answer, It seems that i cannot combine things in parallel if they are on opposite sides of this wire. is that correct?

When simplifying a circuit, can a parallel branch with a current source and a resistor in series be considered as just the current source? Also, if two parallel current sources 'point upwards' i.e. toward the positive rail, can I add them together as one source even if there are other...