real time clock charging circuit
First Claim
1. A real time clock charging circuit mounted on a circuit board and adapted to charge a real time clock being electrically connected thereto, comprising:
- a booting power input terminal adapted to receive an booting power;
a power storage unit adapted to receive and store said booting power from said booting power input terminal and to output a spare power when the real time clock charging circuit receives no input power from the outside;
a first control module electrically connected between said booting power input terminal and said power storage unit and adapted to prohibit said spare power from flowing into said booting power input terminal;
a standby power input terminal adapted to receive a standby power from an external standby power source when said booting power input terminal receives no input power; and
a second control module electrically connected to said first control module, said power storage unit and said standby power input terminal to prohibit said booting power and said spare power from flowing into said booting power input terminal and to prohibit said standby power from flowing into said first control module and said power storage unit, and to receive said booting power, said spare power and said standby power respectively, and to output said booting power, said standby power and said spare power to said real time clock.
1 Assignment
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Accused Products
Abstract
The present invention is to provide a real time clock charging circuit mounted on a circuit board, which comprising an booting power input terminal adapted to receive a booting power passed through a first control module to a power storage unit and a second control module; the power storage unit adapted to store the booting power and to output a spare power prohibited from flowing into the first control module and the spare power only flows into the second control module as receiving no input power; a standby power input terminal adapted to receive a standby power to the second control module enabling to output those power to the real time clock and avoiding them to transmit outside.
11 Citations
8 Claims
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1. A real time clock charging circuit mounted on a circuit board and adapted to charge a real time clock being electrically connected thereto, comprising:
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a booting power input terminal adapted to receive an booting power; a power storage unit adapted to receive and store said booting power from said booting power input terminal and to output a spare power when the real time clock charging circuit receives no input power from the outside; a first control module electrically connected between said booting power input terminal and said power storage unit and adapted to prohibit said spare power from flowing into said booting power input terminal; a standby power input terminal adapted to receive a standby power from an external standby power source when said booting power input terminal receives no input power; and a second control module electrically connected to said first control module, said power storage unit and said standby power input terminal to prohibit said booting power and said spare power from flowing into said booting power input terminal and to prohibit said standby power from flowing into said first control module and said power storage unit, and to receive said booting power, said spare power and said standby power respectively, and to output said booting power, said standby power and said spare power to said real time clock. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification
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- Resources
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Current AssigneeInventec Corporation
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Original AssigneeInventec Corporation
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InventorsTsai, Ticky
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Primary Examiner(s)Miska, Vit W.
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Application NumberUS11/184,770Time in Patent Office468 DaysField of Search368203-204, 307/18, 307 64- 66, 320/116, 320/134, 329/137, 329/166, 323/265, 323/282, 702/60, 702/63, 702/64, 713/300, 713/340US Class Current368/204CPC Class CodesH02J 7/342 The other DC source being a...
