Advanced envelope detection method with novel optical PLL for optical sampling trigger

Otani, Akihito; Tsuda, Yukio; Hirabayashi, F.; Igawa, Koji

doi:10.1049/el:20052150

Cited by 2 publications

(1 citation statement)

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“…Further, the digital envelope detection method involves creating the analytic signal of the input using the Hilbert transform. For synchronous mode, the phase-locked loop (PLL) has been exploited to produce the envelope of received signal in accordance to the frequency [4] [7][8][9][10]. However, these methods have two disadvantages: nonlinearities of square root block and non-coherent detection when the frequency of input wave changes [5].…”

Section: Introductionmentioning

confidence: 99%

Fourier-type integral transforms in modeling of transversal oscillation

Yaremko

Tyapin

2014

Int J App Math Elt Comp

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Envelope detection and measurement has important applications in many domains such as instrumentation, sensors characterization, analog and digital communications. Instead of other envelope detection methods that use analog circuits or digital filters, we propose an electronic circuit that operates measurement in coherent mode. After reproduction of the input wave frequency using direct digital synthesizer, we place the envelope on a new low reference frequency signal followed by an analog measurement block based on analog multipliers and low-pass filters. Design circuit, simulation and experimental results are presented to validate the measurement for different values of input and reference frequencies.

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Section: Introductionmentioning

confidence: 99%