Computer peripheral device and operating method thereof
First Claim
1. A computer peripheral device adapted to a computer system having a system-end connecting interface, comprising:
- a device-end connecting interface detachably electrically connected to the system-end connecting interface, the device-end connecting interface comprising a power pin and a ground drain pin, wherein the power pin is electrically connected to a power source of the computer system;
an impedance unit electrically connected to the power pin and the ground drain pin respectively, and the power pin generating a voltage level on the ground pin via the impedance unit when the power pin is electrically connected to the power source of the computer system; and
a control unit, electrically connected to the conjunction node of the impedance unit and ground drain pin for determining a USB standard of the system-end connecting interface according to the voltage level of the ground drain pin;
wherein the computer peripheral device is arranged such that when the ground drain pin floating, the voltage level of the ground drain pin is reduced to a ground voltage level.
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Accused Products
Abstract
A computer peripheral device, which is adapted to a computer system having a system-end connecting interface, includes a device-end connecting interface, an impedance unit and a control unit. The device-end connecting interface includes a power pin and a ground drain pin. The power pin electrically connects to a power source of the computer system and generates a voltage level on the ground drain pin. The impedance unit electrically connects to the power pin and ground drain pin of the device-end connecting interface respectively and decreases the voltage level of the ground drain pin optionally. The control unit electrically connects to the ground drain pin of the device-end connecting interface and determines a USB specification of the system-end connecting interface according to the voltage level of the ground drain pin.
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Citations
9 Claims
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1. A computer peripheral device adapted to a computer system having a system-end connecting interface, comprising:
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a device-end connecting interface detachably electrically connected to the system-end connecting interface, the device-end connecting interface comprising a power pin and a ground drain pin, wherein the power pin is electrically connected to a power source of the computer system; an impedance unit electrically connected to the power pin and the ground drain pin respectively, and the power pin generating a voltage level on the ground pin via the impedance unit when the power pin is electrically connected to the power source of the computer system; and a control unit, electrically connected to the conjunction node of the impedance unit and ground drain pin for determining a USB standard of the system-end connecting interface according to the voltage level of the ground drain pin; wherein the computer peripheral device is arranged such that when the ground drain pin floating, the voltage level of the ground drain pin is reduced to a ground voltage level. - View Dependent Claims (2)
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3. A computer peripheral device, which is adapted to a computer system having a system-end connecting interface, comprising:
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a device-end connecting interface detachably electrically connected to the system-end connecting interface, the device-end connecting interface comprising a power pin and a ground drain pin, wherein the power pin is electrically connected to a power source of the computer system and generates a voltage level on the ground drain pin; a control unit electrically connected to the ground drain pin and determining a USB standard of the system-end connecting interface according to the voltage level of the ground drain pin; an impedance unit electrically connected to the power pin and the ground drain pin respectively and decreasing the voltage level of the ground drain pin optionally; and an operational amplifier electrically connected to the system-end connecting interface and the control unit wherein the control unit generates a gain control signal according to the voltage level and the operational amplifier adjusts a gain setting according to the gain control signal. - View Dependent Claims (4, 5, 6)
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7. A method for operating a computer peripheral device having a device-end connecting interface, an impedance unit and a control unit, comprising:
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electrically connecting the device-end connecting interface to a system-end connecting interface of a computer system, wherein a power pin of the device-end connecting interface is electrically connected to a power source of the computer system and generates a voltage level on a ground drain pin of the device-end connecting interface; decreasing the voltage level of the ground drain pin optionally by the impedance unit; detecting a voltage level of the ground drain pin by the control unit; determining a USB standard of the system-end connecting interface according to the voltage level by the control unit; generating a gain control signal corresponding to the voltage level and transmitting the gain control signal to an operational amplifier of the computer peripheral device by the control unit; and adjusting a gain setting according to the gain control signal by the operational amplifier. - View Dependent Claims (8, 9)
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Specification