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Building an asynchronous circuit using faster parts implicitly makes the circuit “go” faster. More generally, many digital systems are data flow machines. These are usually designed using synchronous register transfer logic, using specialized programming languages such as VHDL or Verilog. In register transfer logic, binary numbers are stored in groups of flip flops called registers. The outputs of each register are a bundle of wires called a “bus” that carries that number to other calculations.

In the following years a bitter rivalry between Tesla and Edison, known as the “War of Currents”, took place over the preferred method of distribution. AC eventually replaced DC for generation and power distribution, enormously extending the range and improving the safety and efficiency of power distribution. Nikola Tesla made long-distance electrical transmission networks possible. The efforts of the two did much to further electrical engineering—Tesla’s work on induction motors and polyphase systems influenced the field for years to come, while Edison’s work on telegraphy and his development of the stock ticker proved lucrative for his company, which ultimately became General Electric.

The geometry of the dynode chain is such that a cascade occurs with an ever-increasing number of electrons being produced at each stage. Finally the anode is reached where the accumulation of charge results in a sharp current pulse indicating the arrival of a photon at the photocathode. Usage considerations Photomultiplier Photomultiplier tubes typically require 1000 to 2000 volts for proper operation. The most negative voltage is connected to the cathode, and the most positive voltage is connected to the anode.

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