final_sample

final_sample - University of California, Berkeley Fall 2007...

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Unformatted text preview: University of California, Berkeley Fall 2007 EECS 142 Prof. A. Niknejad Final Exam (open book) Saturday, December 15, 2007 Guidelines : You may use a calculator. Do not unstaple the exam. Keep your answers in symbolic form and avoid numerical calculations until the very end. Electron charge: q = 1 . 60217646 10- 19 C Boltzmann constant: k = 1 . 38 10- 23 J / K 1. (20 points) Answer each question succinctly. (a) A ladder filter has the following symmetric scattering parameters ( S 11 = S 22 , S 21 = S 12 ). Draw a schematic for a 3-stage canonical ladder filter. Do not attempt to find the component parameter values. Note that 3-stage means 3 branches in the filter, rather than 3 components (there are between 3 and 6 components in the schematic). Make a mark on the plot to indicate the corner frequency, passband ripple and the passband return loss. 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Freq [GHz]-20-40 [dB] S11 S 2 1 2 RF IF LO S21=-1dB S21=12dB S21=5dB IIP3=-5dBm IIP3=+0dB NF=2dB NF=12dB (b) For the above simple receiver, calculate the minimum detectable signal (dBm) to maintain SNR > 7dB and the overall receiver input referred IP 3. Assume the signal bandwidth is 1MHz. 3 (c) Calculate the in-band iIP 3 of the following amplifier. R D Q2 M1 V s C I Q C R L V bias R 4 C 1 L 1 R L R S M1 M2 M3 V s C Q1 2. (20 points) A multi-stage 5GHz LNA is shown above. Transistor Q1 is a high2....
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final_sample - University of California, Berkeley Fall 2007...

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