If the signals at points a and c are dierenced the

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Unformatted text preview: F , and the lower sign applies when ωLO < ωRF . Now, if the signals at points a and c are summed, the output is ￿ 0 ωLO > ωRF sout (t) = (1) A cos[(ωRF − ωLO )t] ωLO < ωRF b. If the signals at points a and c are differenced, the output is ￿ A cos[(ωLO + ωRF )t] + A cos[(ωLO − ωRF )t] ωLO > ωRF sout (t) = A cos[(ωLO + ωRF )t] ωLO < ωRF (2) c. Suppose that the mixer is to be used to convert a desired signal at frequency ωc to ωIF using high-LO (ωLO = ωc + ωIF ). Since ωLO > ωc , the results for ωLO >...
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