Abstract: A method involving: distributing two clock signals over a clock signal distribution system; in each of a plurality local clocking regions located along the signal distribution system, detecting the two clock signals and generating therefrom a local clock signal for that local clocking region, wherein the generated local clock signals for at least some of the plurality of local clocking regions are in a first group all of which are aligned in phase with each other and the generated local clock signals for the remainder of the plurality of local clocking regions are in a second group all of which are aligned in phase with each other, and wherein the phase of the first group is out of phase with the phase of the second group by a predetermined amount; and bringing all of the clock signals for the plurality of local clocking regions into phase alignment so that the phase of the first group is in phase with the phase of the second group.

Abstract: A method and apparatus for receiving a first signal characterized by a periodically occurring first event; receiving a second signal characterized by a periodically occurring second event; delaying the first signal by a controllable amount of delay to generate a third signal characterized by a periodically occurring third event; and based on relative timing of the first and second signals, controlling the amount of delay so that the periodically occurring third event occurs at a predetermined location between the first and second events of the first and second signals.

Abstract: An optical detector including a substrate; an island of detector material formed on the substrate, the island being a stack extending up from the substrate of alternating layers of first and second semiconductor materials, the island having a horizontally oriented top end, a vertically oriented first sidewall, and vertically oriented second sidewall that is opposite the first sidewall, the island having a first doped region extending into the island through first sidewall and forming a first conductive region that extends down into the island of detector material, the island also having a second doped region extending into the island through the second sidewall and forming a second conductive region that extends down into island of the detector material, the first and second conductive regions each having a top end that is part of the top end of the island; a first electrical connection to the top end of the first conductive region; and a second electrical connection to the top end of the second conductive re