The simplest method of transferring data through the inputs or outputs of a silicon chip is to directly connect each bit of the datapath from one chip to the next chip. Once upon a time this was an acceptable approach. However, one aspect (and perhaps the only aspect) of chip design which has not changed during the career of the authors is Moore's Law, which has dictated substantial increases in the number of circuits that can be manufactured on a chip. The pin densities of chip packaging technologies have not increased at the same pace as has silicon density, and this has led to a prevalence of High Speed Serdes (HSS) devices as an inherent part of almost any chip design. HSS devices are the dominant form of input/output for many (if not most) high-integration chips, moving serial data between chips at speeds up to 10 Gbps and beyond. Chip designers with a background in digital logic design tend to view HSS devices as simply complex digital input/output cells. This view ignores the complexity associated with serially moving billions of bits of data per second. At these data rates, the assumptions associated with digital signals break down and analog factors demand consideration. The chip designer who oversimplifies the problem does so at his or her own peril.

First Published in 1987. Routledge is an imprint of Taylor & Francis, an informa company.

The simplest method of transferring data through the inputs or outputs of a silicon chip is to directly connect each bit of the datapath from one chip to the next chip. Once upon a time this was an acceptable approach. However, one aspect (and perhaps the only aspect) of chip design which has not changed during the career of the authors is Moore's Law, which has dictated substantial increases in the number of circuits that can be manufactured on a chip. The pin densities of chip packaging technologies have not increased at the same pace as has silicon density, and this has led to a prevalence of High Speed Serdes (HSS) devices as an inherent part of almost any chip design. HSS devices are the dominant form of input/output for many (if not most) high-integration chips, moving serial data between chips at speeds up to 10 Gbps and beyond. Chip designers with a background in digital logic design tend to view HSS devices as simply complex digital input/output cells. This view ignores the complexity associated with serially moving billions of bits of data per second. At these data rates, the assumptions associated with digital signals break down and analog factors demand consideration. The chip designer who oversimplifies the problem does so at his or her own peril.

Some of These Days proffers a compelling cultural history of the Harlem Renaissance's vast influence abroad, with a dual focus on the world's first two major African American stars: Josephine Baker and Paul Robeson. But Donald's book extends beyond pure dual biography to recreate the rich community of actors, architects, poets, directors, and musicians who interacted with-and were influenced by-each other. James Donald highlights how the sense of excitement and artistic renewal ushered in with the "New Negro Movement"' reverberated far beyond Harlem to cities such as London, Paris, Berlin, and Vienna. Throughout his chronicle, Donald underscores the relationship of African American aesthetics to the modernist movement that flourished from the 1920s until the end of World War II. Vivid portraits of eccentric and popular artists like the T. S. Eliot, HD, Andre Gide, Carl Van Vechten, Marlene Dietrich, Josef von Sternberg, Jean Gabin, and Adolf Loos, among others, animate the sweeping narrative. Traversing countries and artforms, Some of These Days illustrates the immense cross-cultural collaboration of film, song, dance, and literature that coalesced to create modernist culture-where the new rhythms of the machine age were gleefully embraced, allowing art to consider the new possibilities of cosmopolitanism in a modern world.