The basic memory cell in static RAM is ____.

Question

Examoogle · Accepted Answer

Flip flop

Explanation: A static RAM (SRAM) cell is a type of semiconductor memory that uses a bistable latching circuitry, typically implemented as a flip-flop, to store each bit of data. Unlike DRAM, it does not require periodic refreshing as long as power is supplied to the circuit.

Working Principle: The fundamental unit of an SRAM cell consists of a cross-coupled inverter structure (usually 6 transistors, known as 6T SRAM). This configuration forms a flip-flop, which maintains a stable binary state (0 or 1) by feeding the output of one inverter into the input of the other, creating a feedback loop that holds the state indefinitely while power is maintained.

Key Formulas: $P_{SRAM} = V_{DD} \cdot I_{leakage}$ — Represents power consumption in static mode

Key Points: SRAM stores data using the state of a flip-flop circuit.; Static RAM does not require a refresh cycle, making it faster than DRAM.; SRAM cells typically require 6 transistors (6T) per bit.; It is primarily used for CPU cache memory due to its high speed.

Advantages: High speed (low access time); No refresh circuitry required; Simple interface

Disadvantages: Low density compared to DRAM; High cost per bit; Requires more physical space on the chip

Applications: CPU Cache (L1, L2, L3); Buffer memory in networking equipment; Register files in microprocessors

Additional Info: Option B (Capacitor) is the core storage element for Dynamic RAM (DRAM), which requires constant refreshing to maintain charge.. Option A (Transistor) is a component used within the flip-flop circuit but is not the memory cell itself.

Answer: C is correct — The basic memory cell in static RAM is implemented as a flip-flop.

Exam Tip: Remember: SRAM = Flip-flop (Fast, High Power) and DRAM = Capacitor (Slow, Low Power, Needs Refresh).

Related Questions

Discussion (0)