A CMOS lock-in-amplifier with semi-digital automatic phase tuning

Khiarak, Mehdi Noormohammadi; Gosselin, Benoît; Koninck, Yannick De

doi:10.1109/biocas.2016.7833791

Cited by 9 publications

(1 citation statement)

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“…However, despite this critical significance, there has been no published systematic investigation into the methods of absolute voltage or current measuring range [23,24]. An ideal version of such a method would meet the following requirements [25]: the high dynamic range, as the method should be applicable both in the weak signal and relatively high signal detections without sacrificing accuracy; the signal extraction, as it is convenient to modify the design for various applications, including the sensing, spectrum capturing, and mechanism measuring; the frequency selectivity, which means that the reference frequency can be selected easily, enabling the system to isolate and amplify the required signal at a given frequency; the phase sensitivity, as the reference signal should adjust its phase to the required signal smoothly; the power consumption; system complexity; multi-channels; and so on.…”

Section: Introductionmentioning

confidence: 99%

Single Power Supply, Compact, Self-Adaptive Dynamic Range Lock-In Amplifiers

Yao,

Yuan,

Sui

et al. 2023

Electronics

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To meet the high dynamic voltage or current range measuring in real-time in the modern electrical industry, ranging from the surface science to non-destructive testing, this paper reports two broad dynamic ranging, universal, and compact digital lock-in amplifier methods for the huge dynamic range signal, termed as the hybrid and all-digital amplifiers. Both have reduced the complex components required in the traditional amplifiers to only two or three components without sacrificing the measuring accuracy, even by less than 0.05% in some situations, which has been evaluated via simulations and experiments with the FPGA circuit. Additionally, benefiting from the single-power supply strategy, the proposed methods are suitable for portable devices, including the pocket spectrometer, mechanical resonator monitor, and powered on battery. Such results in this paper illustrate the phase coherent technology with a compact, universal, and integrated circuit with a promising future.

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Section: Introductionmentioning

confidence: 99%