Crosstalk noise

Another promising alternative to the rather restrictive MBLL model is the layer model using diffusion equation. Diffuse optical imaging provides a better model for photon migration where approximation of path length is possible. This would provide a much improved focal change information and potentially eliminate crosstalk noise. 

There are several future directions that NIR brain sensing and imaging research can take. In instrumentation, advances in time-resolve spectroscopic equipment may yield less expensive equipment and thus a more prolific use. This will allow for approximation of time of flight parameter providing a possible avenue for inferring path length. Theoretically, there is a need for better theoretical modeling to eliminate crosstalk noise. Possible improvements have already been introduced by Boas, et. al [8]. However, more human subject studies need to be conducted to... 

Low-dielectric-constant (low-fc) materials are needed to reduce signal delays, crosstalk noise, and power consumption in the next generation of faster and more powerful... 

Before considering the crosstalk noise, let us first discuss the prpperties of signal diffraction from a target grating G . In this case, we can set SOsoff = Sjisoff = = 0°. Then the off-... 

In this section, we will consider the intra-page crosstalk noise which is derived from the unwanted diffraction coming from the same page but a different grating component, Gj + Sesoff. In this case, we can set <%y = S cz = 0°, and then the off-Bragg vector in Eq. (48) can be rewritten as... 

Fig. 14. Schematic diagram of the intra-page crosstalk noise. The off-Bragg diffracted waves coming from other input positions will reach the same position as the signal diffracted wave.

The above equations imply that the intra-page crosstalk noise in the PCR method does not depend on the hologram dimension Lx. This feature of the PCR method is clearly shown in Fig. 15, where the normalized diffracted intensity is plotted as a function of the position Xs, ys) at several values of Lx- While the input image area suffering from the crosstalk noise shrinks with increasing Lx in the conventional monochromatic case, that in the PCR method is unchanged. 

Next, we will focus on Eqs. (71) and (73) to find the rotation angle that is large enough to avoid crosstalk noise. Before considering the case of PCR, we will again treat the conventional monochromatic readout first. In this case, we can set Aog= 0. Thus, Eq. (71) is simplified to... 

Conversely, in order to avoid inter-page crosstalk noise, the crystal rotation angle should be set larger than S cyMn(mono) that is. 

In this section, we will see the influence of the LVF on the properties of the crosstalk noise, and we formulate the achievable storage capacity in the selective detection method. As was seen in Section 3.5.3, the off-Bragg diffraction will occur only when the set of ScCsojf, SPstf, cy, , tAyf) satisfies all of inequalities in Eqs. (71), (72), and (73). Now, due to the... 

Furthermore, the intra-page crosstalk noise will be also suppressed if A vf is sufficiently small. Since the off-Bragg diffraction will occur only when satisfies both the... 

Finally, the storage capacity in Eq. (124) is plotted as a function of AAivf in Fig. 18. The improvement starts at AAlvf = 100 nm, then the storage capacity increases hnearly with increasing AXlvf, and finally, it asymptotically approaches the theoretical limit of the monochromatic case. Note that the kink observed at AAlvf = 0.06 nm is derived from the minimum function that is to say, from that point on, the storage capacity further increases due to the reduction of the intra-page crosstalk noise SPsojfMax in Eq. (117). 

Fig. 15 Crosstalk noise due to parasitic of the switch and its Thevenin s equivalent circuit...

Fig. 16 Modeling of crosstalk noise in A -channel analog multiplexer...

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