1. A wireless communication device for encrypted communication, the wireless communication device comprising:
an information storage module configured to store:
setting information determined and to be used for the encrypted communication; and
judgment information stored on the wireless communication device, the judgment information stored on the wireless communication device being at least part of setting information previously used for the encrypted communication;
an interface configured to write:
the setting information determined and to be used for the encrypted communication into a portable recording medium; and
at least part of setting information previously used for the encrypted communication as judgment information stored on the portable recording medium;
a judgment information input module configured to input the judgment information stored on the portable recording medium from the portable recording medium, the judgment information stored on the portable recording medium being used to determine whether output of the setting information to the interface is to be permitted or prohibited;
a determination module configured to determine whether the output of the setting information to the interface is to be permitted or prohibited, based on a comparison of the judgment information stored on the wireless communication device that is stored in the information storage module and the judgment information stored on the portable recording medium input by the judgment information input module; and
an output control module configured to control the output of the setting information to the interface based on the comparison of the judgment information stored on the wireless communication device and the judgment information stored on the portable recording medium;
wherein the wireless communication device comprises a central processing unit, the central processing unit performing the operations of at least one of the setting information storage module, the interface, the judgment information input module, the determination module, and the output control module;
wherein the judgment information stored on the wireless communication device and the judgment information stored on the portable recording medium include passwords respectively, and
the determination module configured to provide permission to output the setting information to the interface when the passwords are identical;
wherein the determination module configured to, in the case of failed input of the judgment information stored on the portable recording medium, obtain a change of the setting information from factory default setting information and provide permission to output the changed setting information to the interface.
2. The wireless communication device in accordance with claim 1, wherein the determination module determines whether the output of the setting information to the interface is to be permitted or prohibited, based on the judgment information stored on the portable recording medium and the setting information.
3. The wireless communication device in accordance with claim 1, the wireless communication device configured to confirm to International Standard IEEE 802.11, wherein the password is a Wired Equivalent Privacy key.
4. A control method of controlling a wireless communication device for encrypted communication, the wireless communication device having an interface that is used to write data into a portable recording medium, the control method comprising:
storing setting information determined and to be used for the encrypted communication; and predetermined judgment information stored on the wireless communication device being at least part of setting information previously used for the encrypted communication;
inputting judgment information stored on the portable recording medium from the portable recording medium, the judgment information stored on the portable recording medium being used to determine whether output of the setting information to the interface is to be permitted or prohibited;
determining whether the output of the setting information to the interface is to be permitted or prohibited, based on a comparison of the judgment information stored on the wireless communication device and the judgment information stored on the portable recording medium; and
controlling the output of the setting information to the interface based on the comparison of the judgment information stored on the wireless communication device and the judgment information stored on the portable recording medium;
wherein the judgment information stored on the wireless communication device and the judgment information stored on the portable recording medium include passwords respectively,
providing permission to output the setting information to the interface when the passwords are identical; and
in the case of failed input of the judgment information stored on the portable recording medium, obtaining a change of the setting information from factory default setting information and providing permission to output the changed setting information to the interface.
5. A non-transitory recording medium storing instructions for enabling a computer executing the instructions perform a method for controlling a wireless communication device for encrypted communication, which has an interface that is used to write data into a portable recording medium, the method comprising:
storing setting information determined and to be used for the encrypted communication and predetermined judgment information stored on the wireless communication device, the judgment information stored on the wireless communication device being at least part of setting information previously used for the encrypted communication;
inputting judgment information stored on the portable recording medium from the portable recording medium, the judgment information stored on the portable recording medium being used to determine whether output of the setting information to the interface is to be permitted or prohibited;
determining whether the output of the setting information to the interface is to be permitted or prohibited, based on a comparison of the judgment information stored on the wireless communication device and the judgment information stored on the portable recording medium; and
controlling the output of the setting information to the interface based on the comparison of the judgment information stored on the wireless communication device and the judgment information stored on the portable recording medium;
wherein the judgment information stored on the wireless communication device and the judgment information stored on the portable recording medium include passwords respectively,
providing permission to output the setting information to the interface when the passwords are identical; and
in the case of failed input of the judgment information stored on the portable recording medium, obtaining a change of the setting information from factory default setting information and providing permission to output the changed setting information to the interface.
6. The wireless communication device in accordance with claim 1, wherein a password stored in the portable recording medium is used as the judgment information stored on the portable recording medium.
7. The wireless communication device in accordance with claim 1, further comprising an encrypted communication module configured to implement encrypted communication and
configured to use the setting information stored in said setting information storage module for the encrypted communication.
8. The control method in accordance with claim 4, wherein a password stored in the portable recording medium is used as the judgment information stored on the portable recording medium.
9. The control method in accordance with claim 4, wherein the wireless communication device comprises a setting information storage module,
the wireless communication device configured to store the setting information in the setting information storage module and
configured to use the setting information stored in said setting information storage module for encrypted communication.
10. The non-transitory recording medium in accordance with claim 5, wherein a password stored in the portable recording medium is used as the judgment information stored on the portable recording medium.
11. The non-transitory recording medium in accordance with claim 5, the wireless communication device comprises a setting information storage module,
the wireless communication device configured to store said setting information in the setting information storage module and
configured to use the setting information stored in said setting information storage module for encrypted communication.
12. The wireless communication device in accordance with claim 1, wherein the portable recording medium is connectable to another wireless communication device.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A power safety system, comprising:
a power input to be connected with a power supply;
a power output to be connected to a load system;
a first MOS transistor formed on a body, connected between the power input and the power output, and having a source, a drain, and a gate;
an amplifier connected to the power input, the power output, and the gate of the first MOS transistor, and configured to determine a first control signal according to a voltage at the power input and a voltage at the power output, to be applied to the gate of the first MOS transistor;
a charging output end to be connected to a battery;
a second MOS transistor connected between the power output and the charging output, and having a gate;
a power management device connected to the charging output and the gate of the second MOS transistor, and configured to monitor a voltage at the charging output to determine a second control signal to be applied to the gate of the second MOS transistor, thereby controlling a charging current flowing to the charging output;
a body controller connected to the power input, the power output, and the body of the first MOS transistor, and configured to determine a third control signal according to the voltage at the power input and the voltage at the power output; and
a switch having an end connected to the body of the first MOS transistor and an opposite end to be switched between the source and the drain of the first MOS transistor in response to the third control signal.
2. The power safety system of claim 1, wherein the first MOS transistor comprises a PMOS.
3. The power safety system of claim 1, wherein the amplifier is a transconductive amplifier configured to provide a current as the first control signal according to a difference between the voltage at the power input and the voltage at the power output.
4. The power safety system of claim 1, wherein the second MOS transistor comprises a PMOS.
5. The power safety system of claim 1, wherein the second MOS transistor has a parasitic diode having an anode and a cathode connected respectively to the charging output and the power output.
6. The power safety system of claim 1, wherein the first MOS transistor has a first parasitic diode having an anode and a cathode connected respectively to the power output and the power input when the third control signal is at a first state, and a second parasitic diode having an anode and a cathode connected respectively to the power input and the power output when the third control signal is at a second state.
7. A method for a power safety system which includes a first MOS transistor connected between a power input and a power output, and a second MOS transistor connected between the power output and a charging output, the method comprising:
(A) monitoring a voltage at the power input and a voltage at the power output to determine a first control signal to be applied to a gate of the first MOS transistor;
(B) monitoring a voltage at the charging output to determine a second control signal to be applied to a gate of the second MOS transistor, thereby controlling a charging current flowing to the charging output; and
(C) monitoring the voltage at the power input and the voltage at the power output to determine a third control signal, wherein the first MOS transistor has a first parasitic diode having an anode and a cathode connected respectively to the power output and the power input when the third control signal is at a first state, and a second parasitic diode having an anode and a cathode connected respectively to the power input and the power output when the third control signal is at a second state.
8. The method of claim 7, wherein the step A comprises:
comparing the voltage at the power input with the voltage at the power output; and
controlling the first MOS transistor with the first control signal when a difference between the voltage at the power input and the voltage at the power output is smaller than a preset value, so as to maintain the difference between the voltage at the power output and the voltage at the power input at a constant value.
9. The method of claim 7, wherein the step B comprises:
comparing the voltage at the charging output with a preset value; and
turning off the second MOS transistor with the second control signal when the voltage at the charging output exceeds the preset value.
10. The method of claim 7, wherein the step C comprises:
connecting a body of the first MOS transistor to a drain of the first MOS transistor when the third control signal is at a first state; and
connecting the body of the first MOS transistor to a source of the first MOS transistor when the third control signal is at a second state.