RTL gates are almost as simple as DL gates, and remain inexpensive. This combination provides clean output signals and either inversion or non-inversion as needed. Often an additional transistor is included to re-invert the output signal. Resistor-transistor logic gates use Transistors to combine multiple input signals, which also amplify and invert the resulting combined signal. ![]() In logic circuit diagrams the power is not shown, but in a full electronic schematic, power connections are required. Each logic gate requires power so that it can source and sink currents to achieve the correct output voltage. In electronic logic, a logic level is represented by a voltage or current, (which depends on the type of electronic logic in use). Logic gates are primarily implemented electronically using diodes or transistors, but can also be constructed using electromagnetic relays, fluidics, optics, molecules, or even mechanical elements. ![]() The logic normally performed is Boolean logic and is most commonly found in digital circuits. A logic gate performs a logical operation on one or more logic inputs and produces a single logic output.
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