SELECTIVE TEMPERATURE COMPENSATION

• US 20180335813A1
• Filed: 05/22/2017
• Published: 11/22/2018
• Est. Priority Date: 05/22/2017
• Status: Active Grant

• Current Assignee: SanDisk Technologies LLC (Western Digital Corporation)
• Original Assignee: SanDisk Technologies LLC (Western Digital Corporation)
• Inventors: Zhang, Ming, Gao, Feng, Li, Qing, Yang, Xiaoyu
• Granted Patent: US 10,496,450 B2
• Time in Patent Office: Days
• CPC Class Codes: G05B 15/02 electric
• CPC Class Codes: G06F 9/528 by using speculative mechanisms
• CPC Class Codes: G11C 29/028 with adaption or trimming of parameters
• CPC Class Codes: G11C 7/04 with means for avoiding disturbances due to temperature effects

Abstract

Apparatuses, systems, methods, and computer program products are disclosed for selective temperature compensation. An apparatus includes a compensation circuit that applies temperature compensation to an operation based on a temperature detected by a temperature sensor. An apparatus includes a command circuit that receives a lock command. An apparatus includes a lock circuit that locks a temperature compensation applied to an operation in response to receiving a lock command such that the temperature compensation is based on a fixed temperature.

Claims

1. An apparatus comprising:

a compensation circuit that applies temperature compensation to an operation based on a temperature detected by a temperature sensor;

a command circuit that receives a lock command; and

a lock circuit that locks the temperature compensation applied to the operation in response to receiving the lock command such that the temperature compensation is based on a fixed temperature.

2. The apparatus of claim 1, further comprising a storage circuit configured to store a parameter based on the temperature, wherein locking the temperature compensation applied to the operation comprises applying temperature compensation based on the stored parameter.

3. The apparatus of claim 1, further comprising a status circuit configured to set a lock status used by the apparatus, wherein the lock status indicates whether the operation is performed with the fixed temperature or a sensed temperature.

4. The apparatus of claim 3, wherein the lock status indicates that the operation is performed with the fixed temperature in response to receiving the lock command.

5. The apparatus of claim 3, wherein the lock status indicates that the operation is performed with the sensed temperature in response to receiving an unlock command.

6. The apparatus of claim 1, further comprising an unlock circuit configured to receive an unlock command that unlocks the applied temperature compensation such that the temperature compensation is based on a current temperature.

7. The apparatus of claim 6, wherein, in response to receiving the unlock command, a sensing circuit is configured to sense the current temperature using the temperature sensor and determine the temperature compensation based on the current temperature.

8. The apparatus of claim 1, further comprising a coefficient circuit configured to determine one or more temperature coefficients based on the fixed temperature in response to receiving the lock command.

9. The apparatus of claim 8, wherein the lock circuit is configured to apply the one or more temperature coefficients to one or more operations that occur at temperatures different from the fixed temperature.

10. The apparatus of claim 1, further comprising a memory device, wherein the memory device comprises the apparatus.

11. The apparatus of claim 10, wherein the memory device comprises the temperature sensor.

12. The apparatus of claim 1, wherein the lock circuit is configured to lock the applied temperature compensation until an unlock command is received.

13. A system comprising:

a controller; and

an array of memory devices, wherein each memory device of the array of memory devices is configured to;

receive a command from the controller that indicates whether to hold information corresponding to a temperature compensation for performing a plurality of operations; and

in response to the command indicating to hold the information corresponding to the temperature compensation, holding the information such that a plurality of operations use the same information for performing the temperature compensation.

14. The system of claim 13, wherein, in response to the command indicating not to hold the information corresponding to the temperature compensation, each memory device of the array of memory devices is configured to use the information such that the information is adjusted based on a sensed temperature for performing a plurality of operations.

15. The system of claim 13, wherein, in response to the command indicating to hold the information corresponding to the temperature compensation, each memory device of the array of memory devices is configured to set a parameter indicating that the information is held.

16. The system of claim 15, wherein, in response to the command indicating not to hold the information corresponding to the temperature compensation, each memory device of the array of memory devices is configured to set a parameter indicating that the information is not held.

17. The system of claim 13, wherein the information comprises one or more temperature coefficients determined based on a fixed temperature.

18. An apparatus comprising:

means for receiving a lock command that indicates to lock information corresponding to a temperature detected by a temperature sensor;

and

means for performing temperature compensation using the locked information such that the temperature compensation is performed based on a fixed temperature.

19. The apparatus of claim 18, further comprising means for storing the locked information.

20. The apparatus of claim 18, further comprising means for receiving an unlock command that indicates to unlock the information corresponding to the temperature such that the temperature compensation is performed based on a variable temperature.