Dual-mode clock for improved power management in a wireless device
First Claim
1. A system for managing power in a wireless interface system that services communications between a wirelessly enabled host and at least one user input device, comprising:
- a wireless interface unit that wirelessly interfaces with the wirelessly enabled host;
a clock generator operable to generate first and second clock signals corresponding to first and second operating states of the wireless interface unit;
a processing unit operably coupled to the wireless interface unit; and
a power management unit operably coupled to the wireless interface unit, the processing unit, and the clock generator, wherein the power management unit controls the power consumption of the wireless interface device by providing a first power level to the clock generator when the wireless interface unit is in the first operating state and providing a second power level to the clock generator when the wireless interface unit is in the second operating state.
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Accused Products
Abstract
A dual mode clock for providing first and second clock signals to a wireless interface unit. The first and second clock signals correspond to first and second operating states of the wireless interface unit. In the first operating state, the transceiver in the RF analog module is operational and the clock generator provides a first clock signal having low phase-noise characteristics necessary to maintain efficient operation of the transceiver. In a second operating state, the transceiver in the RF analog module is turned off. In this second operational state, the clock generator provides a second clock signal having a quality sufficient to maintain efficient operation of the digital baseband module in the wireless interface. By switching between low-power mode and normal mode, the system is operable to provide a high quality clock signal for use by the RF analog module when it is operational and to provide a lower power, lower quality clock signal which is sufficient for use by the baseband digital unit when the transceiver in the RF analog module is powered down.
42 Citations
23 Claims
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1. A system for managing power in a wireless interface system that services communications between a wirelessly enabled host and at least one user input device, comprising:
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a wireless interface unit that wirelessly interfaces with the wirelessly enabled host;
a clock generator operable to generate first and second clock signals corresponding to first and second operating states of the wireless interface unit;
a processing unit operably coupled to the wireless interface unit; and
a power management unit operably coupled to the wireless interface unit, the processing unit, and the clock generator, wherein the power management unit controls the power consumption of the wireless interface device by providing a first power level to the clock generator when the wireless interface unit is in the first operating state and providing a second power level to the clock generator when the wireless interface unit is in the second operating state. - View Dependent Claims (2, 3, 4, 5)
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6. A system for managing power in a wireless interface system that services communications between a wirelessly enabled host and at least one user input device, comprising:
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a wireless interface unit that wirelessly interfaces with the wirelessly enabled host, wherein the wireless interface unit comprises an analog module including a transceiver unit, a digital module further comprising;
transmitter operation detector operable to detect operation of the transceiver unit, and a voltage regulator control signal generator operable to generate a voltage regulator reference control signal corresponding to the operational status of the transceiver;
a clock generator operable to generate first and second clock signals corresponding to a first operating state wherein the transceiver is operational and a second operating state wherein the transceiver is turned off;
a processing unit operably coupled to the wireless interface unit; and
a power management unit operably coupled to the wireless interface unit, the processing unit, and the clock generator, wherein the power management unit controls the power consumption of the wireless interface device by providing a first power level to the clock generator when the wireless interface unit is in the first operating state and providing a second power level to the clock generator when the wireless interface unit is in the second operating state. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for managing power in a wireless interface unit, comprising:
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generating first and second clock signals from a clock generator, said clock generator being operable to generate the first clock signal when the wireless interface unit is in a first operating state and operable to generate the second clock signal when the wireless interface unit is in a second operating state;
providing the first clock signal to the wireless interface unit when the wireless interface unit is in the first operating state;
providing the second clock signal to the wireless interface unit when the wireless interface unit is in the second operating state; and
using a power management unit to control the clock generator by providing a first operating voltage to cause the clock generator to generate the first clock signal and providing a second operating voltage to cause the clock generator to generate the second clock signal. - View Dependent Claims (17, 18, 19)
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20. An integrated circuit that services communications with a wirelessly enabled host and that services at least one user input device, the integrated circuit comprising:
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a wireless interface unit that wirelessly interfaces with the wirelessly enabled host;
a clock generator operable to provide first and second clock signals to the wireless interface unit, wherein the first clock signal corresponds to a first operating state of the wireless interface unit and the second clock signal corresponds to a second operating state of the wireless interface unit;
a processing unit operably coupled to the wireless interface unit;
an input/output unit operably coupled to the wireless interface unit and to the processing unit, wherein the input/output unit also operably couples to the at least one user input device; and
a power management unit operably coupled to the wireless interface unit, the processing unit, and the clock generator, wherein the power management unit controls the power consumption of the wireless interface device by providing a first power level to the clock generator when the wireless interface unit is in the first operating state and providing a second power level to the clock generator when the wireless interface unit is in the second operating state. - View Dependent Claims (21, 22, 23)
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Specification