By Paul Muller, Yusuf Leblebici
On the earth of optical information communications this e-book may be an absolute must-read. It specializes in optical communications for brief and extremely brief distance purposes and discusses the monolithic integration of optical receivers with processing components in ordinary CMOS applied sciences. What’s extra, it offers the reader with the mandatory historical past wisdom to completely comprehend the trade-offs in short-distance communique receiver layout and provides the main matters to be addressed within the improvement of such receivers in CMOS applied sciences. furthermore, novel layout ways are provided.
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Extra info for CMOS Multichannel Single-Chip Receivers for Multi-Gigabit Optical Data Communications (Analog Circuits and Signal Processing)
Further more, form factor, silicon area and per-link power consumption are key issues to be minimized. Coupling the optical signal from the multimode fiber with a 50 µm core to the detector with a typical diameter of 20–70 µm for 10 Gb/s devices  may require microlenses to be integrated at the system level for the smaller diameter detectors. The standard fiber ribbon cables used in multichannel shortdistance links have a manufacturing pitch of 250 µm. e. the amplifiers and the CDR. In order to be competitive, the die area occupied by an optical receiver shall be comparable or smaller than the one occupied by an equivalent electrical I/O interface, when scaled by the data rate, a metric one could call area-pergigabit per second.
10. 11). e. the photodetector itself and the first stages of amplification. This device noise is a combination of thermal noise, shot noise and flicker noise. While the last component can be considerably suppressed through offset compensation in the amplifiers, the others depend directly on the system bandwidth. Without going into more details for the moment, we notice there is an obvious trade-off between intersymbol interference and noise bandwidth when defining the system bandwidth. 11. 12. Illustration of jitter affecting a data edge The horizontal eye opening on the other hand is affected by another form of noise called jitter.
11 shows the transimpedance gain, required GBWTIA and input referred noise current as a function of RTIA and SnvTIA. 11. 6 System Gain and Bandwidth Specifications In the receiver chain, most block-level parameters influence more than one system-level specification. For this reason, we will first present the different relationships in the form of equations. Then, we will try to extract convenient values for the parameters to meet the various system constraints. 14). Under this condition, we can safely neglect the CDR amplitude noise in the receiver noise calculations later.