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hw+4+2011

# hw+4+2011 - EECS 70B Spring 2011 Wednesday of Week 5...

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Unformatted text preview: EECS 70B Spring 2011 Wednesday of Week 5 Homework 4 1*. Impedance Matching using Transformer: Consider the following radio transmitter circuit. Our goal is to deliver maximum power to the antenna, represented by R L . Vs=10 Rth1 20 RL1 10 (a) Calculate the power deliver to R L for the original circuit shown above . . Vs=10 Rth 20 RL 10 (b) The power deliver to RL can be increased by inserting a transformer-based matching network (the boxed portion) as shown above. Design the ration N 2 :N 1 so that maximum power can be delivered to the load. Find the maximum power delivered to the load. 2*. Op Amp Oscillator: 10.92 (hint: use the same method we applied to Wien-bridge oscillator to this circuit) 3*. Finding transfer function: 14.4 4. Decibel/Linear Conversion: Use the fact that 3dB=2, 10dB=10, -3dB=0.5 and -10dB=0.1 to estimate the values for 1dB, 2dB, 3dB, 4dB, 5dB, 6dB, 7dB, 8dB, 9dB, and 17dB....
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hw+4+2011 - EECS 70B Spring 2011 Wednesday of Week 5...

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