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This paper presents a comparison study on single-OpAmp resonators applied in ΣΔ modulators under the influence of nonidealities. In the recent state-of-the-art, single amplifier resonators have been proposed for the loopfilter to reduce hardware and thus power and area. The question arises if the effort for this single amplifier approach is indeed lower compared to the two amplifier approach, or if...
In this paper we present a novel architecture for phase-locked loop (PLL) based high-speed demodulation of frequency-modulated (FM) atomic force microscopy (AFM) signals. In our approach, we use single-sideband (SSB) frequency upconversion to translate the AFM signal from the position sensitive detector to a fixed intermediate frequency (IF) of 10 MHz. In this way, we fully benefit from the excellent...
In this paper we present a new architecture for PLL-based high-speed demodulation of frequency-modulated AFM signals. In our approach, we use single-sideband frequency up-conversion to translate the AFM signal from the position sensitive detector to a fixed intermediate frequency of 10MHz. In this way, we fully benefit from the excellent noise performance of PLL-based FM demodulators still avoiding...
In this paper we present a novel system architecture for high-speed FM-AFM electronics. The proposed system consists of a PLL-based FM demodulator preceded by a SSB modulator and driving electronics ensuring a stable self-oscillation of the cantilever. Thanks to the SSB upconverion preceding the FM-demodulator, the system allows for demodulation bandwidths as large as the cantilever resonance frequency,...
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