Reducing power consumption in a data storage system
First Claim
1. A method for reducing power consumption of a refresh load device in a circuit that is alternatively powered in one of an alternating current mode and a battery mode, the method comprising adjusting a refresh voltage level to the refresh load device to a lowest value in the battery mode, and adjusting a refresh voltage level to the refresh load device to an intermediate value in the alternating current mode, while maintaining a substantially constant operational voltage level to the refresh load device in both the battery mode and the alternating current mode.
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Abstract
An apparatus and associated method for reducing power consumption in an electronic circuit comprising a refresh load device being employed alternatively between an operational mode and a state refresh mode. A supply voltage level to the refresh load device is adjusted in relation to which of the operational and state refresh modes is employed and in relation to which of a primary alternating current derived power source or a backup battery power source is employed.
80 Citations
15 Claims
- 1. A method for reducing power consumption of a refresh load device in a circuit that is alternatively powered in one of an alternating current mode and a battery mode, the method comprising adjusting a refresh voltage level to the refresh load device to a lowest value in the battery mode, and adjusting a refresh voltage level to the refresh load device to an intermediate value in the alternating current mode, while maintaining a substantially constant operational voltage level to the refresh load device in both the battery mode and the alternating current mode.
- 5. A circuit comprising a power regulator that is responsive to a mode of a self refresh device and responsive to a power supply mode in adjusting a refresh voltage level to the self refresh device to a lowest value while in a refresh mode and powered in a battery mode, in adjusting a refresh voltage level to the self refresh device to an intermediate value while in a refresh mode and powered in an alternating current mode, and in maintaining a substantially constant operational voltage level to the self refresh device while in an operational mode for both the battery mode and the alternating current mode.
Specification