Recent content by dolle39

Homework Statement A hill is described with the following function: f(x,y) = 3/(1+x2 +y2) Where f(x,y) is the height. Find the points where the hill is steepest! Homework Equations ∇f(x,y) = d/dx(f(x,y))i + d/dy(f(x,y))j The Attempt at a Solution d/dx(f(x,y)) = -6x/(1+x2+y2)2 d/dy(f(x,y)) =...

Homework Statement Given the transmitting power of 0.1 mW and received noise of -100 dBm. Consider a signal which needs a SNR of 30 dB. Calculate the range for a signal of 0.5 MHz given that the damping for the signal is calculated as: L = 10 +8.0*f [dB/km] where f is the...

Hi! I want to low-pass filter some simulations that I made. The indata to the simulation is built up by several modules and hence at the edges transients will occur. I want to filter these out. The indata in sampled at 20 Hz. How should I set the time constant for the filter? I mean I know...

Hi, I have a dilemma about transformers that I want to discuss. Say that I have connected an AC source to a step-up transformer with Np turns in the primary winding and Ns in the secondary winding. Say that the secondary winding is connected to a resistance R. We know that the voltage in...