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Digital Electronics: Principles, Devices and Applications

Digital Electronics: Principles, Devices and Applications

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86 <strong>Digital</strong> <strong>Electronics</strong>AY=A(a)ABY=A+B(b)ABABY=A.B(c)Figure 4.25Implementation of basic logic gates using only NOR gates.without having to use an AND gate for the purpose. This connection is also referred to as WIRE-ANDconnection. Figure 4.26(a) shows such a connection for open collector NAND gates. The output in thiscase would beY = ABCDEF (4.8)+VAPull-upResistorBCDAB.CD.EFEFFigure 4.26(a)WIRE-AND connection with open collector/drain devices.

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