{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

3220 test #3

# 3220 test #3 - Name EE 3220 SSN Test 3 Spring 2000 1 Use a...

This preview shows pages 1–3. Sign up to view the full content.

Name:_________________________________________ EE 3220 Test # 3 SSN:__________________________________________ Spring 2000 1. Use a nyquist plot to determine whether the following transfer function is stable. We have found the three poles of the transfer function. A(j ϖ ) ϖ 1 = 1000 -45 o A(j ϖ ) ϖ 2 = 8.6 -120 o A(j ϖ ) ϖ 3 = 0.99 -220 o 2. Find the oscillation frequency of this colpitts oscillator using a quartz crystal. L = 0.1 H C s = 0.3 pF C p = 200 pF Rs = 0 3. A transresistance amplifier has a gain of A r =1500, input impedance of 50 and output impedance if 85 . It is connected to a negative feedback circuit with β = .01. Find A fb , R in , R out , if r in- β = r out- β = 1M . Which type of feedback topologies are needed. Sketch the block diagram showing the forward and feedback connections (sampling and mixing types)

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

View Full Document
4. An amplifier has a very large but unstable open loop gain. To fix this problem, we have added a feedback network that has β = 0.01. Find the open loop gain that will drop the ideal closed loop gain by 5%.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 3

3220 test #3 - Name EE 3220 SSN Test 3 Spring 2000 1 Use a...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online