TTL inputs are the emitters of a ____________a)Transistor-transistor logicb)Multiple-emitter transistorc)Resistor-transistor logicd)Diode-transistor logicCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

TTL inputs are the emitters of a multiple-emitter transistor.

Answer

The answer is option 'B', Multiple-emitter transistor.

Transistor-Transistor Logic (TTL):

Transistor-Transistor Logic (TTL) is a popular digital logic family that uses bipolar junction transistors (BJTs) as its main building blocks. It is widely used in applications such as computers, calculators, and other digital systems.

Resistor-Transistor Logic (RTL):

Resistor-Transistor Logic (RTL) is an older digital logic family that uses resistors and bipolar junction transistors (BJTs) to implement logic gates. It has been mostly replaced by TTL and other newer logic families due to its limitations in terms of speed and power consumption.

Diode-Transistor Logic (DTL):

Diode-Transistor Logic (DTL) is another older digital logic family that uses diodes and bipolar junction transistors (BJTs) to implement logic gates. It also has limitations in terms of speed and power consumption and has been mostly replaced by TTL and other newer logic families.

Multiple-Emitter Transistor:

A multiple-emitter transistor is a type of bipolar junction transistor (BJT) that has more than one emitter. In TTL logic, the TTL inputs are connected to the emitters of the multiple-emitter transistors.

Each emitter of the multiple-emitter transistor is connected to a different input in the TTL logic circuit.

When a high voltage (logic '1') is applied to any of the input emitters, it turns on the corresponding emitter-base junction and allows current to flow through the transistor.

This current then drives the subsequent stages of the TTL circuit.

When a low voltage (logic '0') is applied to all the input emitters, the transistor remains off, and no current flows through it.

Therefore, the correct answer is option 'B', Multiple-emitter transistor, as the TTL inputs are connected to the emitters of the multiple-emitter transistors in a TTL logic circuit.

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