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Diode–transistor logic
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<p>Diode–transistor logic (DTL) is a class of <a href="/facts/Digital_circuit/vWgfC29C">digital circuits</a> that is the direct ancestor of <a href="/facts/Transistor%25E2%2580%2593transistor_logic/z4bvHotl">transistor–transistor logic</a>. It is called so because the <a href="/facts/Logic_gate/RHLulvKI">logic gating</a> functions <a href="/facts/And_(logic)/62uyyn1d">AND</a> and <a href="/facts/Or_(logic)/jbI2EGlM">OR</a> are performed by <a href="/facts/Diode_logic/vV8MehjW">diode logic</a>, while <a href="/facts/Inverter_(logic_gate)/pGk3qGTI">logical inversion (NOT)</a> and <a href="/facts/Amplifier/pnRgxncC">amplification</a> (providing signal restoration) is performed by a <a href="/facts/Transistor/Bmr8zwL0">transistor</a> (in contrast with <a href="/facts/Resistor%25E2%2580%2593transistor_logic/V9JGuspy">resistor–transistor logic</a> (RTL) and <a href="/facts/Transistor%25E2%2580%2593transistor_logic/z4bvHotl">transistor–transistor logic</a> (TTL). </p>