Judging from the results of Figures 5.16. and 5.18, which method for generating a spectral component at the data clock frequency generates a higher-power one: the squarer or the delay-and-multiply circuit?

Figure 5.16

Figure 5.18

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(a) 100 200 400 500 600 300 1.5 1 (b) 0.5 100 400 600 200 300 500 1 0.5 (c) 200 400 600 800 1000 1200 1400 1600 1800 2000 FFT Bin Spectrum Amplitude (a) -1 100 200 300 400 500 600 ЛП (b) -1 100 200 300 400 500 600 1 (c) 0.5 500 1000 1500 2000 2500 3000 3500 4000 FFT Bin Spectrum Amplitude Amplitude