Semiconductor memory
Upcoming SlideShare
Loading in...5

Semiconductor memory



This Presentation has the details about the Semiconductor memory

This Presentation has the details about the Semiconductor memory



Total Views
Slideshare-icon Views on SlideShare
Embed Views



0 Embeds 0

No embeds



Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
Post Comment
Edit your comment

    Semiconductor memory Semiconductor memory Presentation Transcript

    • Semiconductor Memories
      • Semiconductor memory  is an electronic data storage device, often used as computer memory, implemented on a  semiconductor-based integrated circuit .
    • Semiconductor memory
    • Example of Semiconductor memory
      • Examples of semiconductor memory includes Non-volatile memory such as Read-only memory (ROM), Magnetoresistive Random Access Memory (MRAM), and Flash memory .
      • It also includes volatile memory  such as  Static Random Access Memory  (SRAM)
    • Cont.,
      • These memories can be constructed to store large amount of data entirely within a computer system.
      • The number of locations and the size of storing data may vary from memory to memory.
      • Each location is called Memory cell .
    • Memory cell operation
    • Memory cell
      • The memory cell is used to store single bit of information .
      • The memory cell is fabricated by using either bipolar Metal Oxide Semiconductors (MOS) or Complementary Metal Oxide Semiconductors (CMOS).
    • Semiconductor memory classification
    • Memory Architecture: Decoders
    • Array-Structured memory Architecture
    • Hierarchical memory Architecture
    • Memory Timing Definitions
    • Memory Timing Approaches
    • Read-Write Memories (RAM)
      • Static (SRAM)
      • Data stored as long as supply is applied
      • Large (6 transistor/cell)
      • Fast
      • Differential
    • Read-Write Memories
      • Dynamic (DRAM)
      • Periodic refresh required
      • Small (1-3 transistors/cell)
      • Slower
      • Single Ended
    • 6- Transistor CMOS SRAM Cell
    • CMOS SRAM Analysis (Write)
    • CMOS SRAM Analysis (Read)
    • 6T- SRAM - Layout V DD GND Q Q WL BL BL M1 M3 M4 M2 M5 M6
    • 3- Transistor DRAM Cell
    • 3-T DRAM Layout BL2 BL1 GND RWL WWL M3 M2 M1
    • DRAM Cell
      • 1T DRAM requires a sense amplifier for each bit line, due to charge redistribution read-out.
      • DRAM Memory cells are single ended in contrast to SRAM cells .
    • 1-T DRAM cell
    • Semiconductor Memory Trends Memory Size as a function of time: x 4 every three years
    • Semiconductor Memory Trends Increasing die size factor 1.5 per generation Combined with reducing cell size factor 2.6 per generation
    • Semiconductor Memory Trends Technology feature size for different SRAM generations
    • The End
      • …… . Thank You …….