Buie of TRW invented Transistor-Transistor Logic in the year 1961. The ICs made using TTL are widely used in computers, industrial controls, electronics, etc.
The first transistor performs the logic function and the second transistor performs the amplification function. The transistor-transistor logic is built with the help of bipolar junctio n transistors (BJTs). There are many logic families like RTL (Resistor-transistor logic), DTL (Diode-Transistor Logic), TTL (Transistor-Transistor Logic), ECL (Emitter-Coupled Logic), and CMOS (Complementary Metal Oxide Semiconductor Logic). Introduction to transistor-transistor logic (TTL Logic) The N and P are doped semiconductor materials.
There are two types of BJTs, and they are- NPN and PNP-type bipolar junction transistors. For the amplification process, a BJT does not need any DC power source. The low amplitude input signal is applied at the base, and its amplified form is available at the collector terminal. These terminals are called emitter, base, and collector. Many TTL logic gates made up of transistors are fabricated on a single integrated circuit( IC) or chip.īJT has two p-n junctions that are capable of amplifying the input signal. Transistor Transistor logic (TTL logic) has transistors as a basic building element.
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