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US 6,686,877 B2Granted
Satellite signal receiver
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsToshihiro Ishigaki, Akifumi Miyano
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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsToshihiro Ishigaki, Akifumi Miyano
Estimating the term…
A satellite signal receiver includes a satellite signal reception unit, timer, and power-on/off controlling element. The satellite signal reception unit calculates a current position of the satellite signal receiver using an electric wave from a satellite, in response to a positioning request. The timer is used to clock an elapsed time in calculating the current position of this receiver. The power-on/off controlling element controls an on/off state of power supplied to both the satellite signal reception unit and the timer on the basis of information including the positioning request, the elapsed time clocked by the timer, and a reception condition of the satellite signal reception unit. Accordingly, a period of time for supplying the power is automatically turned on/off to be shortened in cases the positioning is impossible, thus the power being saved.
A satellite signal receiver comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Receivers: power consumption
Receivers: acquisition or tracking or demodulation of signals transmitted by the system
Radio direction-finding
Term ended 25 Jan 2022 (estimated)
1. The Field of the Invention
The present invention relates to a satellite signal receiver, and in particular, to a power controller for a satellite signal receiver used for devices, such as mobile terminals or mobile phones, that have a satellite signal reception unit.
2. Related Art
In the accompanying drawings:
FIG. 1 is a block diagram showing the configuration of a conventional satellite signal receiver;
FIG. 2 is a block diagram showing the configuration of a satellite signal receiver employed in a first to fifth embodiments of the present invention;
Embodiments of the present invention will now be described in conjunction with the appended drawings.
FIG. 2 is a block diagram showing the configuration of a satellite signal receiver in accordance a first embodiment of the present invention. Incidentally, a satellite signal receiver used in a second to fifth embodiments, which will be described later, also adopt the identical configuration to that shown in FIG. 2.
As shown in FIG. 2, the satellite signal receiver is equipped with an antenna 5, satellite signal reception unit 6, timer 11, communication unit 13, power supply 3, power switching unit 4, and control unit 12.