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Beilstein J. Nanotechnol. 2017, 8, 1407–1426, doi:10.3762/bjnano.8.142
Figure 1: (a) Time-domain example of an amplitude modulated signal with carrier frequency fc = 50 Hz, modulat...
Figure 2: Classification of demodulation methods discussed in this paper.
Figure 3: (a) Functional block diagram of the lock-in amplifier implementation and (b) illustrative double-si...
Figure 4: (a) Functional block diagram of the high-bandwidth lock-in amplifier implementation and (b) illustr...
Figure 5: General block diagram of the Kalman filter for demodulation. Thick lines indicate vector-valued sig...
Figure 6: Functional block diagram of the Lyapunov filter implementation.
Figure 7: Functional block diagram of (a) moving average filter and (b) mean absolute deviation measurement t...
Figure 8: Functional block diagram of (a) the peak hold method and (b) the modified peak hold method based on...
Figure 9: Functional block diagram of the coherent demodulator implementation.
Figure 10: Schematic signal flow of the numerical integration scheme employed by the coherent demodulator with...
Figure 11: Tracking bandwidth frequency response of the demodulators showing the −3 dB tracking bandwidth and ...
Figure 12: Off-mode rejection of the demodulators for a carrier frequency of fc = 50 kHz and a tracking bandwi...
Figure 13: Off-mode rejection of (a) fourth-order lock-in amplifier and (b) first-order Kalman filter for a ca...
Figure 14: Schematic block diagram of the reference experiment of filtering a band-limited white noise process...
Figure 15: Schematic block diagram of bandwidth-vs-noise experiment of recovering an amplitude-modulated band-...
Figure 16: Tracking bandwidth vs total integrated noise (TIN) for each demodulator (blue circles) and for a lo...
Figure 17: (a) Frequency response of the DMASP cantilever in open-loop (blue) and for various quality factor c...
Figure 18: 3D image, 2D image and cross section of amplitude estimates obtained from (a) lock-in amplifier wit...
Figure 19: 3D image, 2D image and cross section of amplitude estimates obtained from (a) lock-in amplifier wit...
Figure 20: Functional block diagram of the Kalman filter implementation. Thick lines indicate vector-valued si...
Figure 21: Maximum tracking bandwidth of (a) coherent demodulator (n = 6) and (b) half-period coherent demodul...
Figure 22: Relationship between demodulator tuning variable and achievable tracking bandwidth.
Figure 23: Experimental and theoretical total integrated noise of a low-pass filtered white noise process for ...
Beilstein J. Nanotechnol. 2016, 7, 284–295, doi:10.3762/bjnano.7.26
Figure 1: Simplified cross-section schematic of a beam with bonded piezoelectric layer. An electric field E3 ...
Figure 2: (a) Annotated photo, (b) schematic and (c) electrical circuit model of the piezoelectric cantilever....
Figure 3: Block diagram representing the transfer function from voltage actuation and tip disturbance to char...
Figure 4: Block diagram of the self-sensing scheme with dual feedforward compensator to cancel the capacitive...
Figure 5: Photo of the implemented PCB circuit for bimodal charge sensing.
Figure 6: (a) Frequency response measured with the OBD sensor (−) of an NT-MDT NSG01 base-excited cantilever ...
Figure 7: (a) Frequency response of the first flexural mode measured with the charge sensor before (−) and af...
Figure 8: (a) Voltage noise density estimate of demodulated amplitude obtained from LIA with low-pass filter ...
Figure 9: Approach (red, −) and retract (blue, −) curves obtained on a TGZ1 calibration grating with OBD sens...
Figure 10: AFM Experiment on a TGZ1 calibration grating showing the 3D images of topography and fundamental mo...
Figure 11: Bimodal experiment with the first and fifth eigenmode of the piezoelectric cantilever on a PS/LPDE ...