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Flash Memory …and a tour through FETs. Junction Field Effect Transistor.

Published byGabriel Lawson Modified over 8 years ago

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Presentation on theme: "Flash Memory …and a tour through FETs. Junction Field Effect Transistor."— Presentation transcript:

1 Flash Memory …and a tour through FETs

2 Junction Field Effect Transistor

3 Metal Oxide Semiconductor Field Effect Transistor

4 Actual MOSFET Devices Single MOSFET on Intel chipEnhancement MOSFET

5 MOSFET Motor Control Circuit componentMotor Control Circuit

6 Floating Gate MOSFET = Flash +++++ Assume: V DS =V D - V S =+12V What happens if?: V GS =V G – V S= +12 V Then what happens?: to ‘jailed’ electrons if V GS is set to 0V?

7 Reading Memory State Change in Threshold Voltage due to Screening Effect of Floating Gate Read mode: Apply intermediate voltage, check whether current is flowing or not

8 Writing Memory State Control gate voltage determines whether electrons are injected to, or push/pulled out of floating gate.

9 Block Structure

10 Writing block structure: The ole 2-step Step 1: Set all bits to 1 (clear out electrons from floating gate) Step 2: Set selected bits to 0 (inject electrons from control to floating gate) 1 2

11 Voila – flash memory stick

12 Citations/Image Sources http://www.learnabout-electronics.org/fet_01.php (JFETs) http://www.learnabout-electronics.org/fet_01.php http://volga.eng.yale.edu/index.php/Main/Semiconductors#M OSFET http://volga.eng.yale.edu/index.php/Main/Semiconductors#M OSFET http://www.electronics-tutorials.ws/transistor/tran_7.html (MOSFET motor control) http://www.electronics-tutorials.ws/transistor/tran_7.html http://www.engadget.com/2011/10/31/engadget-primed- ssds-and-you/ http://www.engadget.com/2011/10/31/engadget-primed- ssds-and-you/ https://www.youtube.com/watch?v=msi5GDz9JIw (hyperscience youtube channel – reading flash contents) https://www.youtube.com/watch?v=msi5GDz9JIw

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