Systems and methods for reducing power consumption of a communications device using multiple elements in a receiver chain
First Claim
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1. A communications device comprising:
- a first receiver coupled to a first phase lock loop (PLL) and a first subscriber identity module (SIM);
a second receiver coupled to the first PLL, a second PLL, and a second SIM;
a transmitter coupled to the second PLL; and
a controller coupled to the first PLL and the second PLL, wherein the controller is configured to;
initiate, using the first PLL, a first wake up signal for the first receiver if a first transmission is in progress using the second SIM, andinitiate, using the second PLL, a second wake up signal for the second receiver if a second transmission is in progress using the first SIM.
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Abstract
Systems and methods according to embodiments of the present invention are provided for increasing the power efficiency of a communications device by allowing it to support dual-SIM functionality while issuing simultaneous wake ups for each SIM. Embodiments of the present invention leverage time sharing solutions to minimize the amount of circuitry needed in a communications device to issue wake ups while avoiding the drawbacks of other time sharing solutions that result in increased overhead due to requiring multiple transitions from an idle state to an active state.
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18 Claims
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1. A communications device comprising:
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a first receiver coupled to a first phase lock loop (PLL) and a first subscriber identity module (SIM); a second receiver coupled to the first PLL, a second PLL, and a second SIM; a transmitter coupled to the second PLL; and a controller coupled to the first PLL and the second PLL, wherein the controller is configured to; initiate, using the first PLL, a first wake up signal for the first receiver if a first transmission is in progress using the second SIM, and initiate, using the second PLL, a second wake up signal for the second receiver if a second transmission is in progress using the first SIM. - View Dependent Claims (2, 3, 4, 5, 6, 15, 16, 17)
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7. A communications device comprising:
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a first receiver coupled to a first phase lock loop (PLL) and a first subscriber identity module (SIM); a second receiver coupled to the first PLL, a second PLL, and a second SIM; a transmitter coupled to the second PLL; and a controller coupled to the first PLL and the second PLL, wherein the controller is configured to; couple an output of the first PLL to the first receiver to initiate a first wake-up signal for the first receiver while a call is in progress using the second SIM, and couple an output of the second PLL to the second receiver to initiate a second wake-up signal for the second receiver while a call is in progress using the first SIM. - View Dependent Claims (8, 9, 10, 18)
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11. A method for sending wake up signals in a communications device having first and second receivers, the method comprising:
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determining that a first wake up signal should be sent to the first receiver and a second wake up signal should be sent to the second receiver; initiating the first wake up signal for the first receiver via a first phase lock loop (PLL) if a first transmission, is in progress using a second subscriber identity module (SIM) associated with the second receiver; and initiating a second wake up signal for the second receiver via a second PLL if a second transmission is in progress using a first SIM associated with the first receiver. - View Dependent Claims (12, 13, 14)
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Specification