set19new - R F /R in order for | V o /V o | = 1 6 at f = f...

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

ECE3050 Assignment 19 1. The circuit shows a Wein bridge oscillator. If R 1 = R 2 , C 1 =0 . 1 µ F , C 2 =0 . 22 µ F ,and R 4 =10k , specify R 1 , R 2 ,and R 3 for the circuit to have stable oscillations at f = 1000 Hz . Answers: R 1 = R 2 = 1073 and R 3 = 6875 . 2. The f gure shows a phase-shift oscillator with the feedback loop broken. By writing node equations, it can be shown that the loop-gain transfer function is given by V 0 o V o = R F R ( RCs ) 3 ( RCs ) 3 +6( RCs ) 2 +5( RCs )+1 (a) To solve for the frequency of oscillation, what do you set V 0 o /V o equal to? Answer: 1 6 0 . (b) Use the transfer function to solve for the frequency of oscillation. Answer: f 0 = 1 / ¡ 2 π 6 RC ¢ . (c) Use the transfer function to solve for value of

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: R F /R in order for | V o /V o | = 1 6 at f = f . Answer: R F /R 1 = 29 . 3. The f gure shows a phase shift oscillator. If C = 0 . 1 F , specify R and R F for the circuit to have stable oscillations at f = 200 Hz . Answers: R = 3249 and R F = 94 . 21 k . 1 4. The loop-gain transfer function of a particular oscillator circuit is given by V o V o = K s ( s/ 100) 2 + 0 . 5 ( s/ 100) + 1 At what frequency does the circuit oscillate and what must be the value of K for stable oscillations? Answers: f = 15 . 9 Hz and K = 0 . 005 . 2...
View Full Document

This note was uploaded on 05/25/2011 for the course ECE 3050 taught by Professor Hollis during the Summer '08 term at Georgia Institute of Technology.

Page1 / 2

set19new - R F /R in order for | V o /V o | = 1 6 at f = f...

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

View Full Document
Ask a homework question - tutors are online