EE 521 Homework 4: Power and Noise in Electrical Circuits - Prof. Aly El Osery, Assignments of Electrical and Electronics Engineering

Download EE 521 Homework 4: Power and Noise in Electrical Circuits - Prof. Aly El Osery and more Assignments Electrical and Electronics Engineering in PDF only on Docsity! EE 521: Homework 4 1. Prove that the maximum delivered power to a resistive load RL is obtained if the source resistance, R, is matched with RL. 2. Prove Frii’s formula. 3. Given the circuit in Figure 1 and assuming T = 290K. R R R vo Figure 1: Noise figure calculation (a) Sketch the noise equivalent circuit. (b) find the rms noise voltage appearing at the output terminals in a 100kHz bandwidth using Nyquist’s Formula. 4. A preamplifier, with power gain to be found, having a noise figure of 2.5dB is cascaded with a mixer with a gain of 5dB and a noise figure of 8dB. Find the preamplifier gain such that the overall noise figure of the cascade is at most 4dB. 1