Recent content by louie

I'm considering the 12 –point sequence x[n] which is defined as x[n] = {1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1}. I'd like to use Matlab to find the DFT (X[k] of x[n]) and DTFT (X(e^jw) of x[n]). I realize that the DFT is sampled version of DTFT, and I want to show this graphically using...

You can try connecting a 10 kohm pot between the offset null pins (1 and 5) of the op amp. The wiper arm of the pot. connects to the negative supply voltage. Then adjust the pot. to zero the offset. It should be noted that this only cancels the output offset at one particular operating point...

Does anyone know of any good oscillating circuits that are able to produce square, triangle, and sine waveforms (or any combination of these waveforms). The circuit that I'm constructing has to vary in frequency and is limited to using high-speed op-amps and other general components (resistors...

If I'm considering a 3 phase line (25kV line-to-line voltage) that comes to a point and splits into single phase lines, what is the line voltage of one of the single phase lines ? Does it remain 25 kV or is it 14.4 kV because you're only dealing with 1 phase and a neutral now ? Any...

Please refer to jpeg extension I think that the following MatLab code will solve the first D.E, >> function xdot = nlseq(t,x); % Returns the state derivative >> R = [2 -1; 3 5]; >> L = [1 – cos(0.5*t) 5*sin(4*t); 20*sin(2*t) 3–cos(0.8*t)]; >> V = [15*sin(t); 25*cos(t)]; >> xdot...

Do you really only use electrical isolation between logic level control signals and the drive circuits (ie. dc-dc converter). Is the main reason for this because different voltage supplies are used (example: +/- 15 V for logic and 30 V for drive circuitry) and each has it's own reference to...

correction correction original post...should say -0.1Iqr not -0.1IdrIqr, -0.2Iqr not -0.2Iqr^2, 0.6Iqr not 0.6IdrIqr, 0.3Iqr not 0.3 Iqr^2

I want to use MATLAB ode23 or ode45 to solve the following problem, (ignore the periods '.' as they are there to line up the vector spaces) ... Ids ...0.5Ids-0.3Iqs-0.4Idr-0.1IdrIqr ... 0.2Vd d ..Iqs = -0.3Ids+0.5Iqs+0.8Idr-0.2Iqr^2 . . + . 0.2Vds dt .Idr...