Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > A dynamic RAM consists ofa)6 transistorsb)2 t...
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A dynamic RAM consists of
- a)6 transistors
- b)2 transistors and 2 capacitors
- c)2 capacitors only
- d)1 transistors and 1 capacitors
Correct answer is option 'D'. Can you explain this answer?
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A dynamic RAM consists ofa)6 transistorsb)2 transistors and 2 capacito...
Dynamic Random Access Memory (DRAM) is a type of memory that is commonly used in digital devices such as computers and smartphones. It is called dynamic because it needs to be refreshed periodically to maintain the stored data.
The correct answer is option 'D', which states that a dynamic RAM consists of 1 transistor and 1 capacitor. This answer is correct because the basic building block of a dynamic RAM cell is a single transistor and a single capacitor.
Explanation:
1. Dynamic RAM Cell Structure:
- A dynamic RAM cell is made up of a single transistor and a single capacitor.
- The transistor is typically a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) and acts as a switch to control the flow of charge to the capacitor.
- The capacitor stores the binary information in the form of electrical charge.
- The transistor and capacitor are connected in a feedback loop, forming a basic memory cell.
2. Operation of Dynamic RAM:
- When a write operation is performed, the transistor is turned on, allowing charge to flow into or out of the capacitor.
- This charge represents the binary information being written to or read from the memory cell.
- To maintain the stored data, the charge in the capacitor needs to be refreshed periodically. This is because the charge leaks out of the capacitor over time due to parasitic capacitance and leakage currents.
- The refresh operation involves reading the data from the capacitor, amplifying it, and then rewriting it back to the capacitor.
3. Advantages of Dynamic RAM:
- Dynamic RAM is a widely used memory technology due to its high density and relatively low cost compared to other memory types.
- It allows for the storage of large amounts of data in a small physical space, making it suitable for applications that require a lot of memory.
4. Limitations of Dynamic RAM:
- The main limitation of dynamic RAM is its volatility, meaning that it loses its stored data when the power is turned off. This is in contrast to non-volatile memory types such as Flash memory.
- Dynamic RAM also requires periodic refreshing, which consumes additional power and can introduce access delays.
In conclusion, a dynamic RAM consists of 1 transistor and 1 capacitor, which form the basic memory cell. This configuration allows for high-density memory storage and enables the reading and writing of binary data.
The correct answer is option 'D', which states that a dynamic RAM consists of 1 transistor and 1 capacitor. This answer is correct because the basic building block of a dynamic RAM cell is a single transistor and a single capacitor.
Explanation:
1. Dynamic RAM Cell Structure:
- A dynamic RAM cell is made up of a single transistor and a single capacitor.
- The transistor is typically a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) and acts as a switch to control the flow of charge to the capacitor.
- The capacitor stores the binary information in the form of electrical charge.
- The transistor and capacitor are connected in a feedback loop, forming a basic memory cell.
2. Operation of Dynamic RAM:
- When a write operation is performed, the transistor is turned on, allowing charge to flow into or out of the capacitor.
- This charge represents the binary information being written to or read from the memory cell.
- To maintain the stored data, the charge in the capacitor needs to be refreshed periodically. This is because the charge leaks out of the capacitor over time due to parasitic capacitance and leakage currents.
- The refresh operation involves reading the data from the capacitor, amplifying it, and then rewriting it back to the capacitor.
3. Advantages of Dynamic RAM:
- Dynamic RAM is a widely used memory technology due to its high density and relatively low cost compared to other memory types.
- It allows for the storage of large amounts of data in a small physical space, making it suitable for applications that require a lot of memory.
4. Limitations of Dynamic RAM:
- The main limitation of dynamic RAM is its volatility, meaning that it loses its stored data when the power is turned off. This is in contrast to non-volatile memory types such as Flash memory.
- Dynamic RAM also requires periodic refreshing, which consumes additional power and can introduce access delays.
In conclusion, a dynamic RAM consists of 1 transistor and 1 capacitor, which form the basic memory cell. This configuration allows for high-density memory storage and enables the reading and writing of binary data.
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Community Answer
A dynamic RAM consists ofa)6 transistorsb)2 transistors and 2 capacito...
- A dynamic RAM (DRAM) cell typically consists of two main components: transistors and capacitors. Each DRAM cell stores a single bit of data.
- The common configuration of a DRAM cell includes two transistors and two capacitors. One transistor is known as the access transistor or pass transistor, and it controls the access to the storage capacitor. The other transistor is called the storage or control transistor, and it controls the charging and discharging of the storage capacitor.
- The two capacitors in the DRAM cell store the charge, representing the binary value of the stored bit (0 or 1). The charge in the capacitors needs to be periodically refreshed, as it tends to leak away due to the inherent properties of the capacitors.
- Therefore, the correct answer is B: 2 transistors and 2 capacitors.
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A dynamic RAM consists ofa)6 transistorsb)2 transistors and 2 capacitorsc)2 capacitors onlyd)1 transistors and 1 capacitorsCorrect answer is option 'D'. Can you explain this answer?
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