Logic Gates Using Diodes And Transistors Pdf
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Diode logic was used extensively in the construction of early computers, where semiconductor diodes could replace bulky and costly active vacuum tube elements. The most common use for diode logic is in diode—transistor logic DTL integrated circuits that, in addition to diodes, include inverter logic to provide a NOT function and signal restoration. While diode logic has the advantage of simplicity, the lack of an amplifying stage in each gate limits its application.
Electronic Logic Circuits
Activity 1. Logic gates are the basic building blocks of any digital system. Due to this reason logic gates can also be considered as electronic circuits. View Lab Report 1 - 1 Logic Gates. The output BJT switches between its cut-off and saturation regions to create logic 1 and 0, respectively. NA Pages. Each gate performs a specific logic function behind which there is an equivalent transistor based electronic circuit.
Electronic Logic Circuits
A digital system is basically a binary world. One where the language is restricted to 1s and 0s. Therefore, to make the best of these 1s and Os, logic gates form the foundation to build a digital system that we know today. Hence, if you are keen on understanding digital electronics, you must be clear with the basic boolean logic. This article is all about logic gates and their types. It aims to be a stepping stone for all the digital electronics enthusiasts who are embarking on their learning journey. Some of the common examples of the application of digital logic gates are half adder, full adder , and flip flops.
The use of transistors for the construction of logic gates depends upon their utility as fast switches. When the base-emitter diode is turned on enough to be driven into saturation , the collector voltage with respect to the emitter may be near zero and can be used to construct gates for the TTL logic family. For the AND logic, the transistors are in series and both transistors must be in the conducting state to drive the output high. For the OR logic, the transistors are in parallel and the output is driven high if either of the transistors is conducting. For the NAND logic, the transistors are in series, but the output is above them.
Simple digital logic gates can be made by combining transistors, diodes and resistors as Let us investigate some of such circuits using Diode-Resistor Logic.
OR and AND logic gates made with diodes
In this tutorial, we will have a brief introduction to Logic Gates. Logic gates are the heart of digital electronics. A gate is an electronic device which is used to compute a function on a two valued signal. Logic gates are the basic building block of digital circuits. Basically, all logic gates have one output and two inputs.
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