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Monolithic modulator and demodulator of differential quadrature phase-shift keying signals based on silicon microrings.
Zhang L, Yang JY, Li Y, Song M, Beausoleil RG, Willner AE. Zhang L, et al. Opt Lett. 2008 Jul 1;33(13):1428-30. doi: 10.1364/ol.33.001428. Opt Lett. 2008. PMID: 18594654
Silicon microring resonators are proposed to achieve ultrasmall differential quadrature phase-shift keying modulators and demodulators operated at 20 Gb/s, which may require a dramatically reduced chip size. The modulators are characterized in terms of the carrier trans …
Silicon microring resonators are proposed to achieve ultrasmall differential quadrature phase-shift keying modulators and demodulators …
In vivo validation of cardiac output assessment in non-standard 3D echocardiographic images.
Nillesen MM, Lopata RG, de Boode WP, Gerrits IH, Huisman HJ, Thijssen JM, Kapusta L, de Korte CL. Nillesen MM, et al. Phys Med Biol. 2009 Apr 7;54(7):1951-62. doi: 10.1088/0031-9155/54/7/006. Epub 2009 Mar 5. Phys Med Biol. 2009. PMID: 19265202
Cardiac blood flow was measured simultaneously by an ultrasound transit time flow probe positioned around the common pulmonary artery. Three-dimensional adaptive filtering using the characteristics of speckle was performed on the demodulated rf data to reduce …
Cardiac blood flow was measured simultaneously by an ultrasound transit time flow probe positioned around the common pulmonary …
A 4-GHz frequency-domain fluorometer with internal microchannel plate photomultiplier cross-correlation.
Berndt KW, Gryczynski I, Lakowicz JR. Berndt KW, et al. Anal Biochem. 1991 Jan;192(1):131-7. doi: 10.1016/0003-2697(91)90197-2. Anal Biochem. 1991. PMID: 2048714
Within a circular area near the photocathode edge, however, the R2024U allows accurate phase shift and demodulation measurements up to at least 4.5 GHz, the frequency limit of our PMT-modulation amplifier. By mixing immediately after the photocathode, there is no decrease …
Within a circular area near the photocathode edge, however, the R2024U allows accurate phase shift and demodulation measurements up t …
A new method for measuring small local vibrations in the heart using ultrasound.
Kanai H, Satoh H, Hirose K, Chubachi N. Kanai H, et al. IEEE Trans Biomed Eng. 1993 Dec;40(12):1233-42. doi: 10.1109/10.250580. IEEE Trans Biomed Eng. 1993. PMID: 8125499
The reason is that the amplitude of the cardiac motion is large during one beat period which produces large fluctuations in the transit time required for ultrasonic waves to travel from the transducer to the heart and back. This paper proposes a new method for overc …
The reason is that the amplitude of the cardiac motion is large during one beat period which produces large fluctuations in the transit …