NOR logic

<p>A <a href="/facts/NOR_gate/3l3MqaMI">NOR gate</a> or a NOT OR gate is a logic gate which gives a positive output only when both inputs are negative.
</p><p>Like <a href="/facts/NAND_logic/ye1XC5Ac">NAND gates</a>, NOR gates are so-called "<a href="/facts/Universal_gate/RHLulvKI">universal gates</a>" that can be combined to form any other kind of <a href="/facts/Logic_gate/RHLulvKI">logic gate</a>. For example, the first <a href="/facts/Embedded_system/a4muX1wU">embedded system</a>, the <a href="/facts/Apollo_Guidance_Computer/xGxHlrXY">Apollo Guidance Computer</a>, was built exclusively from NOR gates, about 5,600 in total for the later versions. Today, <a href="/facts/Integrated_circuit/fjn6vg7C">integrated circuits</a> are not constructed exclusively from a single type of gate. Instead, <a href="/facts/Electronic_design_automation/o4la3fmX">EDA</a> tools are used to convert the description of a logical circuit to a <a href="/facts/Netlist/Wwt4M3jo">netlist</a> of complex gates  or transistors (<a href="/facts/Full_custom/foRH7blx">full custom</a> approach).
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NOR logic open-in-new

NOR logic