CONTROL CIRCUIT FOR IDENTIFYING POWER ADAPTOR AND METHOD FOR USE THEREOF
First Claim
1. A control circuit being configured to identify an adaptor used with an electronic device comprising:
- a system-side circuit that is configured to be incorporated in the electronic device, wherein the system-side circuit includes a switching circuit; and
an adaptor-side circuit that is configured to be incorporated in the adaptor, wherein the adaptor-side circuit is used to convert an alternating current voltage to a direct current voltage and outputs the direct current voltage by positive and negative output terminals thereof, one of the positive and negative output terminals is coupled to said switching circuit, the other one of the positive and negative output terminals is configured to be coupled to the electronic device, the adaptor-side circuit includes a dividing circuit connected to the one of the positive and negative output terminals that is coupled to said switching circuit, and the dividing circuit has a voltage output control terminal that is connected to said switching circuit and used to switch on the switching circuit so that the electronic device is powered.
2 Assignments
0 Petitions
Accused Products
Abstract
A control circuit (100) being adapted for identifying an adaptor of an electronic device includes an adaptor-side circuit (110) that is incorporated in the adaptor and a system-side circuit (120) that is incorporated in the electronic device. The adaptor-side circuit converts a high alternating voltage coming from a power source to a low direct voltage and has a positive output terminal and a negative output terminal. A voltage dividing circuit (30) is connected with the positive output terminal, and has a control terminal outputting a voltage. The system-side circuit includes a switching circuit (40) connected to the positive output terminal and the control terminal. The voltage outputted by the control terminal is used to switch on the switching circuit in order to energize the electronic device via the direct current voltage outputted by the positive and negative output terminals.
13 Citations
20 Claims
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1. A control circuit being configured to identify an adaptor used with an electronic device comprising:
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a system-side circuit that is configured to be incorporated in the electronic device, wherein the system-side circuit includes a switching circuit; and an adaptor-side circuit that is configured to be incorporated in the adaptor, wherein the adaptor-side circuit is used to convert an alternating current voltage to a direct current voltage and outputs the direct current voltage by positive and negative output terminals thereof, one of the positive and negative output terminals is coupled to said switching circuit, the other one of the positive and negative output terminals is configured to be coupled to the electronic device, the adaptor-side circuit includes a dividing circuit connected to the one of the positive and negative output terminals that is coupled to said switching circuit, and the dividing circuit has a voltage output control terminal that is connected to said switching circuit and used to switch on the switching circuit so that the electronic device is powered. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of identifying an adaptor used with an electronic device, comprising the following steps:
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converting an alternating current voltage inputted to the adaptor into a direct current voltage and outputting the direct current voltage, via one of a pair of positive and negative output terminals of the adaptor, to a switching circuit that is incorporated in the electronic device, wherein the other one of the positive and negative output terminals is connected to the electronic device; dividing the direct current voltage to form a controlling voltage having a value lower than the direct current voltage; inputting the controlling voltage to the switching circuit via a control terminal to switch on the switching circuit in order to power the electronic device using the direct current voltage. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A control circuit for identifying an adaptor for an electronic device, wherein the adaptor is used for converting AC power to DC power to be used by the electronic device, the control circuit comprising:
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a dividing circuit incorporated in the adaptor, comprising two resistors connected in series, wherein one of the resistors is connected with a positive output terminal of the adaptor and the other one of the resistors is connected to ground, a control terminal extending from a junction between the two resistors; and a switching circuit having first and second input terminals connecting with the positive output terminal of the adaptor and the control terminal, respectively, and an output terminal connecting with the electronic device, wherein when a switch in the switching circuit is turned on by the control terminal, the DC power flows from the positive output terminal through the first input terminal and the output terminal of the switch circuit to the electronic device. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification