3 2 18 solution a suppose that the rf input signal is

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Unformatted text preview: rejection of image responses. 2 2-8 Solution a. 58.6, 80, 278.6, 300, 2520, 2541.4, 2878.6, 2900 MHz b. There would 16 frequencies on the list if there were 4 conversions instead of 3. 3 2-18 Solution a. Suppose that the RF input signal is: sRF (t) = A cos(ωRF t) The signal at point a is sa (t) = = = sRF (t) cos(ωLO t) A cos(ωRF t) cos(ωLO t) 1 2 A{cos[(ωRF + ωLO )t] + cos[(ωLO − ωRF )t]} The signal at point b is sb (t) = = = sRF (t) sin(ωLO t) A cos(ωRF t) sin(ωLO t) 1 2 A{sin[(ωRF + ωLO )t] + sin[(ωLO − ωRF )t]} The signal at point c is sc (t) = 1 A{− cos[(ωRF + ωLO )t]...
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This homework help was uploaded on 03/13/2014 for the course ECE 453 taught by Professor Staff during the Spring '08 term at University of Illinois, Urbana Champaign.

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