USB PORT TESTER

• US 20070136025A1
• Filed: 09/15/2006
• Published: 06/14/2007
• Est. Priority Date: 12/09/2005
• Status: Active Grant

• Current Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hon Hai Precision Industry Co., Ltd.
• Inventors: Deng, Min-Fu, Chen, Tao-Gen, Su, Xiao, LO, CHIEN-HUNG
• Granted Patent: US 7,392,147 B2
• Time in Patent Office: Days
• US Class Current: 702/122
• CPC Class Codes: G01R 31/31715 Testing of input or output circuits; test of circuitry between the I/C pins and the functional core, e.g. testing of input or output driver, receiver, buffer

Abstract

A Universal Serial Bus (USB) port tester for testing a USB port of an electronic device includes an interface unit, a current-testing unit, and a voltage-testing unit. The interface unit is used for electrically connecting with the USB port of the electronic device and a USB device. The current-testing unit is connected to the interface unit for testing quality of the USB port of the electronic device in a standard current range. The voltage-testing unit is connected to the interface unit for testing quality of the USB port of the electronic device in a standard voltage range.

Claims

1. A Universal Serial Bus (USB) port tester for testing a USB port of an electronic device, the USB port tester comprising:

an interface unit configured for electrically connecting the USB port of the electronic device to a USB device;

a current-testing unit connected to the interface unit for testing quality of the USB port of the electronic device in a standard current range; and

a voltage-testing unit connected to the interface unit for testing quality of the USB port of the electronic device in a standard voltage range.

2. The USB port tester as claimed in claim 1, wherein the interface unit comprises a first USB port for electrically connecting with the USB port of the electronic device, and a second USB port for electrically connecting with the USB device, terminals of the first USB port are respectively electrically coupled to the corresponding terminals of the second USB port.

3. The USB port tester as claimed in claim 2, wherein the current-testing unit comprises an ampere meter and a variable resistor, the ampere meter and the variable resistor are connected between a power terminal and a ground terminal of the first USB port in series.

4. The USB port tester as claimed in claim 2, wherein the voltage-testing unit comprises a direct current (DC) power supply source, a Microprogrammed Control Unit (MCU), and an indicating unit, the DC power supply source is applied to the MCU, the MCU is connected to the power terminal of the first USB port, the indicating unit is connected to the MCU for indicating whether a voltage of the USB port of the electronic device is in the standard voltage range or not.

5. The USB port tester as claimed in claim 4, wherein the indicating unit comprises a first indicator, and a second indicator, the first indicator indicates whether a voltage of the USB port of the electronic device is greater than the standard voltage range or not, the second indicator indicates whether a voltage of the USB port of the electronic device is less than the standard voltage range or not.

6. The USB port tester as claimed in claim 4, wherein the indicating unit comprises a third indicator, the third indicator indicates the working status of the DC power supply source.

7. The USB port tester as claimed in claim 4, wherein the indicating unit comprises a buzzer, the buzzer is connected to the MCU for indicating whether voltage of the USB port of the electronic device satisfies a range of standard voltage or not.

8. The USB port tester as claimed in claim 4, wherein an amplifying circuit is connected between a power terminal of the first USB port and the MCU.

9. The USB port tester as claimed in claim 1, wherein the USB device is a USB mouse.

10. A Universal Serial Bus (USB) port tester for testing a USB port of an electronic device, the USB port tester comprising:

a first USB port configured for electrically connecting with the USB port of the electronic device;

a second USB port electrically connected to a USB device, terminals of the first USB port respectively electrically coupled to the corresponding terminals of the second USB port;

a current-testing unit connected to the interface unit for testing current of the USB port of the electronic device; and

a voltage-testing unit connected to the interface unit for testing voltage of the USB port of the electronic device.

11. The USB port tester as claimed in claim 10, wherein the current-testing unit comprises an ampere meter and a variable resistor, the ampere meter and the variable resistor are connected between a power terminal and a ground terminal of the first USB port in series.

12. The USB port tester as claimed in claim 10, wherein the voltage-testing unit comprises a direct current (DC) power supply source, a Microprogrammed Control Unit (MCU), and an indicating unit, the DC power supply source is applied to the MCU, the MCU is connected to the power terminal of the first USB port, the indicating unit is connected to the MCU for indicating whether a voltage of the USB port of the electronic device is in a standard voltage range or not.

13. The USB port tester as claimed in claim 12, wherein the indicating unit comprises a first indicator, and a second indicator, the first indicator indicates whether a voltage of the USB port of the electronic device is greater than the standard voltage range or not, the second indicator indicates whether a voltage of the USB port of the electronic device is less than the standard voltage range or not.

14. The USB port tester as claimed in claim 12, wherein the indicating unit comprises a third indicator, the third indicator indicates the working status of the DC power supply source.

15. The USB port tester as claimed in claim 12, wherein the indicating unit comprises a buzzer, the buzzer is connected to the MCU for indicating whether a voltage of the USB port of the electronic device is in the standard voltage range or not.

16. The USB port tester as claimed in claim 12, wherein an amplifying circuit is connected between the power terminal of the first USB port and the MCU.