Electricity: power supply or regulation systems – External or operator controlled – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2000-08-21
2003-12-16
Vu, Bao Q. (Department: 2838)
Electricity: power supply or regulation systems
External or operator controlled
Using a three or more terminal semiconductive device as the...
C323S354000, C323S284000, C323S286000
Reexamination Certificate
active
06664775
ABSTRACT:
BACKGROUND
In general, the use of a portable communication or computing device (e.g., a cell phone, a personal digital assistant (PDA), etc.) is limited, at least in part, by the amount of power that may be provided by a battery. A conventional technique to reduce the amount of power consumed by a portable device is to lower the operational voltage range of at least a portion of the portable device when not in use. For example, it may be desirable to place the processor associated with the portable device into a standby, low power mode when the processor is not in use.
Alternatively, the operational frequency of the processor may be reduced when the processor is not in use. However, with conventional processors, the execution of instructions by the processor is halted while the frequency is lowered so that the processor does not lose synchronization while the frequency is adjusted. Halting of the processor may reduce the throughput of the processor and create inconvenient delay for the user. Thus, a need exists to reduce the power consumption of a processor while reducing the impact on the processor's efficiency and the amount of inconvenience created for the user.
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PCT Search Report dated Nov. 27, 2002.
Clark Lawrence T.
Heeb Jay
Minaei Ali
Morrow Michael W.
Tseng Yuan-Po Ypt
Seddon Kenneth M.
Vu Bao Q.
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