2 article(s) from Ragazzon, Michael R. P.
- Full Research Paper
- Published 08 Feb 2018
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Figure 1: Block diagram of the multifrequency AFM control loop.
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Figure 2: Block diagram of a single-frequency Lyapunov filter. The pink shaded area highlights the calculatio...
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Figure 3: Block diagram of a multifrequency Lyapunov filter.
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Figure 4: (a) Simulated and (b) experimentally obtained frequency responses of the Lyapunov filter with a car...
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Figure 5: Experimental frequency responses from a single-frequency Lyapunov filter with five carrier frequenc...
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Figure 6: The effect of channel cross-coupling on tracking bandwidth for a system based on two frequencies. T...
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Figure 7: Experimental and simulated off-mode rejection frequency responses for both (a–e) fast demodulator (...
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Figure 8: Experimental frequency response of the NSG01 cantilever in free air and the power spectrum of the t...
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Figure 9: Higher harmonic (amplitude) AFM imaging with a (a–f) lock-in amplifier and (g–l) multifrequency Lya...
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Figure 10: Experimental frequency response of the DMASP cantilever in free air and the power spectrum of the t...
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Figure 11: Higher-harmonic AFM imaging performed with the fundamental mode of the DMASP cantilever on a PS/LPD...
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- Review
- Published 10 Jul 2017
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Figure 1: (a) Time-domain example of an amplitude modulated signal with carrier frequency fc = 50 Hz, modulat...
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Figure 2: Classification of demodulation methods discussed in this paper.
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Figure 3: (a) Functional block diagram of the lock-in amplifier implementation and (b) illustrative double-si...
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Figure 4: (a) Functional block diagram of the high-bandwidth lock-in amplifier implementation and (b) illustr...
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Figure 5: General block diagram of the Kalman filter for demodulation. Thick lines indicate vector-valued sig...
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Figure 6: Functional block diagram of the Lyapunov filter implementation.
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Figure 7: Functional block diagram of (a) moving average filter and (b) mean absolute deviation measurement t...
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Figure 8: Functional block diagram of (a) the peak hold method and (b) the modified peak hold method based on...
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Figure 9: Functional block diagram of the coherent demodulator implementation.
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Figure 10: Schematic signal flow of the numerical integration scheme employed by the coherent demodulator with...
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Figure 11: Tracking bandwidth frequency response of the demodulators showing the −3 dB tracking bandwidth and ...
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Figure 12: Off-mode rejection of the demodulators for a carrier frequency of fc = 50 kHz and a tracking bandwi...
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Figure 13: Off-mode rejection of (a) fourth-order lock-in amplifier and (b) first-order Kalman filter for a ca...
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Figure 14: Schematic block diagram of the reference experiment of filtering a band-limited white noise process...
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Figure 15: Schematic block diagram of bandwidth-vs-noise experiment of recovering an amplitude-modulated band-...
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Figure 16: Tracking bandwidth vs total integrated noise (TIN) for each demodulator (blue circles) and for a lo...
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Figure 17: (a) Frequency response of the DMASP cantilever in open-loop (blue) and for various quality factor c...
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Figure 18: 3D image, 2D image and cross section of amplitude estimates obtained from (a) lock-in amplifier wit...
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Figure 19: 3D image, 2D image and cross section of amplitude estimates obtained from (a) lock-in amplifier wit...
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Figure 20: Functional block diagram of the Kalman filter implementation. Thick lines indicate vector-valued si...
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Figure 21: Maximum tracking bandwidth of (a) coherent demodulator (n = 6) and (b) half-period coherent demodul...
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Figure 22: Relationship between demodulator tuning variable and achievable tracking bandwidth.
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Figure 23: Experimental and theoretical total integrated noise of a low-pass filtered white noise process for ...
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