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參數(shù)資料
| 型號： | 25260C |
| 英文描述： | AMD MirrorBit? White Paper |
| 中文描述： | AMD公司的MirrorBit？白皮書 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大小： | 147K |
| 代理商： | 25260C |
AMD MirrorBit
6
The voltage at which the channel forms is called the threshold voltage of the transistor, and is often
referred to as Vt. Increasing the control gate voltage beyond the threshold voltage results in an
increase in the current flowing between the source and drain.
The key to Flash memory cell operation is
that when charge is stored in the floating
gate, the threshold voltage of the transistor
increases.
This change in threshold
voltage enables one to detect whether
or not a cell is programmed.
Single-bit cells basically have two
threshold states, a programmed state
(threshold voltage V
tp
) and an erased
state (threshold voltage V
te
). The read
voltage is selected to be between the
programmed and erased threshold
voltages. If current flows at the read
voltage, then the cell is read as erased.
COMPETING MULTI-LEVEL CELL TECHNOLOGIES
One common way of increasing the density of memory cells is to use competing multi-level cell
(MLC) technology. Competing multi-level cells basically store fractional levels of charge within a cell
to offer increased data storage capability. Since the threshold voltage of a transistor depends on
the number of electrons in the floating gate, it is possible to store different units of data based on
differences in the number of electrons stored in the cell. As a result, multi level cells store more
than the basic 0 and 1, and instead they store 00, 01, 10 and 11. To store n bits per cell, the device
needs to have 2
n
different states. Each of these states requires a different number of electrons to be
stored in the floating gate, and consequently each state has its own threshold voltage.
Threshold Voltage
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參數(shù)描述 |
|---|---|
| 25261/0002 | 制造商:Weidmuller 功能描述: |
| 25261/0003 | 制造商:Weidmuller 功能描述: |
| 25261/0005 | 制造商:Weidmuller 功能描述: |
| 2526-1-01-00-00-00-07-0 | 功能描述:電路板硬件 - PCB SWAGE MNT SOLDER TERMINALS RoHS:否 制造商:Harwin 類型:Shield Clip 長度:9.4 mm 螺紋大小: 外徑: 材料:Beryllium Copper 電鍍:Tin |
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