ECE102_W07_Quiz2

ECE102_W07_Quiz2 - 2 Question 3 (2 + 2 = 4 points):...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE102 Quiz 2 – Question Pages Winter 2007 1 Student ID Name (Last, First) Score Question 1 (3 + 2 = 5 points): Treat this opamp configuration as a feedback system. The op amp gain is G (and the op amp is otherwise ideal). (a) Find the loop gain. (b) Find the feedback factor β . Question 2 (2 + 2 + 2 + 2 = 8 points): The figure below shows the Bode plot of the open loop gain A of a feedback system. The feedback factor = 10 -2 . (a) Find the magnitude (in dB) of the closed loop gain, | A f |, at ω = 10 3 . (b) Find the magnitude (in dB) of the closed loop gain, | A f |, at = 10 10 . (c) Find the magnitude (in dB) of the closed loop gain, | A f |, at = 10 11 . (d) Find the magnitude (in dB) of the closed loop gain, | A f |, at = 10 12 . 25 Write your answers on the separate answer pages; we will not look at these question pages. | A | (dB) (log scale) 80 10 6 +20 dB/dec 10 10 -40 dB/dec 40 10 8 10 12 10 4 10 2 120 v IN v OUT 1 k - + 1 k 1 k 1 k 1 k G 2 k
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ECE102 Quiz 2 – Question Pages Winter 2007
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 2 Question 3 (2 + 2 = 4 points): Consider a linear system with input x(t) and output y(t) . The system is characterized by the second-order frequency response H(j ) , shown as the thick curve. (a) What is the gain-bandwidth of the linear system? (b) Find the input signal x(t) that would result in an output y(t) = sin(10t). Question 4 (2 points): Shown below is the Bode plot of the magnitude of H , which has one pole and one zero. Draw the Bode plot of the magnitude of G , which is equal to H but with an additional zero at = 10 4 . Question 5 (2 + 2 + 2 = 6 points): Assume the opamp G is ideal. (a) Find the common mode gain. (b) Find the differential mode gain. (c) Calculate the output voltage caused by the input bias currents. x(t) y(t) H(s) | H | (dB) (log scale) 80 dB 10 5 40 dB | H | (dB) (log scale) 80 dB 10 2 20 dB v 1 v OUT- + 500 G v 2 1 k 1 k 1 k 1 k...
View Full Document

This note was uploaded on 05/30/2009 for the course ECE 641158 taught by Professor Curtshurgers during the Spring '09 term at UCSD.

Page1 / 2

ECE102_W07_Quiz2 - 2 Question 3 (2 + 2 = 4 points):...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online