Abstract: During operation, the computer may obtain an access acceptance message, where the access acceptance message indicates that the electronic device has been authenticated and allowed to securely access a network, and where the authentication is based at least in part on a passphrase associated with a user of an electronic device. For example, the computer may receive the acceptance message from the computer network device or a second computer (such as a controller). Alternatively, the computer may obtain the access acceptance message while performing the authentication. Then, the computer may automatically provide a second passphrase addressed to a computer network device and the electronic device, where the second passphrase replaces the passphrase during a current session of the electronic device in the network. Moreover, when the current session ends, the computer may automatically revert to the passphrase for subsequent authentication of the user.

Abstract: A power supply phase doubling system includes a pulse width modulation (PWM) controller and first and second phase doubling chips. The PWM controller outputs a PWM signal. The first phase doubling chip is operated at a power supply voltage and has a first PWM output pin to generate a first control signal and a second control signal according to the PWM signal, and generates a first output signal according to the first control signal. The second phase doubling chip is operated at the power supply voltage, has a second PWM output pin, and is configured to generate a second output signal according to the second control signal. The first and second phase doubling chips are respectively switched between a master mode and a slave mode according to a voltage level of the first PWM output pin and a voltage level of the second PWM output pin.

Abstract: A voltage detection device is provided. The voltage detection device includes a first voltage divider circuit, a comparison circuit, and a second voltage divider circuit. The first voltage divider circuit is configured to receive an input voltage and output a comparison voltage according to the input voltage. The comparison circuit is configured to receive the comparison voltage to compare the comparison voltage with a reference voltage and determine whether to change a trigger signal according to a comparison result. The second voltage divider circuit is configured to receive the input voltage. When the input voltage is greater than or equal to a predetermined voltage value, the second voltage divider circuit and the first voltage dividing circuit form a parallel structure to pull down the comparison voltage.

Abstract: During operation, the computer may obtain an access acceptance message, where the access acceptance message indicates that the electronic device has been authenticated and allowed to securely access a network, and where the authentication is based at least in part on a passphrase associated with a user of an electronic device. For example, the computer may receive the acceptance message from the computer network device or a second computer (such as a controller). Alternatively, the computer may obtain the access acceptance message while performing the authentication. Then, the computer may automatically provide a second passphrase addressed to a computer network device and the electronic device, where the second passphrase replaces the passphrase during a current session of the electronic device in the network. Moreover, when the current session ends, the computer may automatically revert to the passphrase for subsequent authentication of the user.

Abstract: A voltage detection device is provided. The voltage detection device includes a first voltage divider circuit, a comparison circuit, and a second voltage divider circuit. The first voltage divider circuit is configured to receive an input voltage and output a comparison voltage according to the input voltage. The comparison circuit is configured to receive the comparison voltage to compare the comparison voltage with a reference voltage and determine whether to change a trigger signal according to a comparison result. The second voltage divider circuit is configured to receive the input voltage. When the input voltage is greater than or equal to a predetermined voltage value, the second voltage divider circuit and the first voltage dividing circuit form a parallel structure to pull down the comparison voltage.

Abstract: A power supply phase doubling system includes a pulse width modulation (PWM) controller and first and second phase doubling chips. The PWM controller outputs a PWM signal. The first phase doubling chip is operated at a power supply voltage and has a first PWM output pin to generate a first control signal and a second control signal according to the PWM signal, and generates a first output signal according to the first control signal. The second phase doubling chip is operated at the power supply voltage, has a second PWM output pin, and is configured to generate a second output signal according to the second control signal. The first and second phase doubling chips are respectively switched between a master mode and a slave mode according to a voltage level of the first PWM output pin and a voltage level of the second PWM output pin.

Abstract: A communication verification system is provided. The communication verification system includes a local transmitting-end unit, a remote receiving-end unit, and a repeater device. The local transmitting-end unit is set to a first computing mode and outputs an initial value. The remote receiving-end unit is set to a second computing mode. The repeater device receives the initial value from the local transmitting-end unit and outputs an initial value to the remote receiving-end unit according to the second computing mode. The repeater device receives and stores a computation result from the remote receiving-end unit, and then outputs a confirmation signal to the local transmitting-end unit according to the first computing mode. The repeater device outputs the computation result to the local transmitting-end unit for verification when the repeater device receives a query signal from the local transmitting-end unit.

Abstract: A communication verification system is provided. The communication verification system includes a local transmitting-end unit, a remote receiving-end unit, and a repeater device. The local transmitting-end unit is set to a first computing mode and outputs an initial value. The remote receiving-end unit is set to a second computing mode. The repeater device receives the initial value from the local transmitting-end unit and outputs an initial value to the remote receiving-end unit according to the second computing mode. The repeater device receives and stores a computation result from the remote receiving-end unit, and then outputs a confirmation signal to the local transmitting-end unit according to the first computing mode. The repeater device outputs the computation result to the local transmitting-end unit for verification when the repeater device receives a query signal from the local transmitting-end unit.

Abstract: A method and system for the testing of multiple elements in a communications network. The method may include using a test host that has both control and data input/output capabilities. The test host may send a signal over the network via one communication device, such as a mobile station, that is connected to and controlled by the test host. A resulting signal may then be received at the communication device or at a second communication device, which may be another mobile station, that is connected to and controlled by the test host. A comparison of the signal sent into the network with the signal received from the network may be used to verify proper operation of any elements in the network.