Invention Grant
US07755946B2 Data state-based temperature compensation during sensing in non-volatile memory
有权
在非易失性存储器中感测时的数据状态温度补偿
- Patent Title: Data state-based temperature compensation during sensing in non-volatile memory
- Patent Title (中): 在非易失性存储器中感测时的数据状态温度补偿
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Application No.: US12233950Application Date: 2008-09-19
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Publication No.: US07755946B2Publication Date: 2010-07-13
- Inventor: Mohan V. Dunga , Masaaki Higashitani
- Applicant: Mohan V. Dunga , Masaaki Higashitani
- Applicant Address: US CA Milpitas
- Assignee: Sandisk Corporation
- Current Assignee: Sandisk Corporation
- Current Assignee Address: US CA Milpitas
- Agency: Vierra Magen Marcus & DeNiro LLP
- Main IPC: G11C16/00
- IPC: G11C16/00

Abstract:
Temperature effects in a non-volatile storage device are addressed by providing a data state-dependent, and optionally temperature dependent, sense current during verify and read operations. A different sense current is provided for each data state, so that a common temperature coefficient is realized for storage elements with different data states. The temperature coefficient for higher states can be reduced to that of lower states. During sensing, a sense time can be adjusted to achieve a desired sense current when a selected storage element is in a conductive state. A fixed voltage trip point may be maintained. During the sense time, a pre-charged capacitor discharges into a selected storage element such as via a bit line and NAND string, when the selected storage element is in a conductive state. The discharge level is translated to a current which is compared to a state-dependent, and optionally temperature dependent, reference current.
Public/Granted literature
- US20100074014A1 DATA STATE-BASED TEMPERATURE COMPENSATION DURING SENSING IN NON-VOLATILE MEMORY Public/Granted day:2010-03-25
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