Abstract: An antenna structure includes an expansion card connector, an antenna, and a plurality of metal pins. The antenna is disposed on the expansion card connector. The plurality of metal pins is disposed on the expansion card connector, whereof the plurality of metal pins includes a first designated pin to be a feeding point of the antenna. The plurality of metal pins further includes a plurality of second designated pins, whereof the plurality of second designated pins is electrically connected to each other to be a radiator of the antenna.

Abstract: A method for recovering basic input/output system (BIOS) in a computer system is disclosed. The computer system includes a host unit, a control unit, and a first storage device. The control unit is utilized for controlling system power provided for the host unit. The host unit is utilized for accessing a BIOS code stored in the first storage device to perform a boot process. The method includes turning the system power off when the computer system has a recovery requirement, restoring a backup BIOS code into the first storage device, and turning the system power on to make the host unit access the restored BIOS code in the first storage device for performing the boot process.

Abstract: An antenna structure includes an expansion card connector, an antenna, and a plurality of metal pins. The antenna is disposed on the expansion card connector. The plurality of metal pins is disposed on the expansion card connector, whereof the plurality of metal pins includes a first designated pin to be a feeding point of the antenna. The plurality of metal pins further includes a plurality of second designated pins, whereof the plurality of second designated pins is electrically connected to each other to be a radiator of the antenna.

Abstract: In an amplifying circuit, an amplifier receives an input signal via a first resistor unit, and generates an output signal at an output thereof. A second resistor unit is connected between the output and input of the amplifier, and has at least one control input. The second resistor unit has a variable equivalent impedance that is controlled by a control signal received at the control input. A feedback control unit receives the output signal from the amplifier, and is operable so as to provide the control signal to the control input of the second resistor unit when the output signal does not fall within a voltage range defined by a predetermined low voltage and a predetermined high voltage to adjust the variable equivalent impedance of the second resistor unit.

Abstract: In an amplifying circuit, an amplifier receives an input signal via a first resistor unit, and generates an output signal at an output thereof. A second resistor unit is connected between the output and input of the amplifier, and has at least one control input. The second resistor unit has a variable equivalent impedance that is controlled by a control signal received at the control input. A feedback control unit receives the output signal from the amplifier, and is operable so as to provide the control signal to the control input of the second resistor unit when the output signal does not fall within a voltage range defined by a predetermined low voltage and a predetermined high voltage to adjust the variable equivalent impedance of the second resistor unit.

Abstract: A circuit and a method capable of adjusting the external clock of a CPU are disclosed. When needed, the computer user can adjust the external clock by inputting an external-clock value (for example, 66 or 33) via the keyboard. The keyboard controller feeds the control signal, corresponding to the external-clock value, into the external-clock storage device to store the external-clock value. Next, the south bridge circuit shuts down the computer system. And the wake-up circuit wakes up the south bridge circuit in a wake-up time (for example, one second) to reboot the computer system. Afterward the external-clock storage device feeds the external-clock value into the clock generator and the clock generator provides the CPU with the external clock according to the external-clock value.

Abstract: A key switch system for switching in a cyclic pattern between a plurality of wireless communication apparatuses of a computer, comprising a function key, mounted on the computer, for generating an interrupt signal after depression; software for activating and deactivating the wireless communication apparatuses according to the signal, with one activated at a time; and a display window for displaying the activated/deactivated status of the wireless communication apparatuses; wherein cyclic switching between the wireless communication apparatuses are enacted by the depression of the function key; the wireless communication apparatuses include incompatible ones; and the cyclic pattern follows the sequence of, firstly, activating in turn each one of the apparatuses in a round and then, secondly, deactivating all of the apparatuses after a round is finished and starting another round.

Abstract: A remote control system for a portable computer with a built-in IR receiver receiving IR signals emitted from a remote controller, comprising chipsets connecting the central processing unit to the IR receiver and to a serial port; a circuit switcheably connecting the IR receiver to the serial port; and software for determining whether to switch short the circuit by transmitting a first signal to the circuit and whether to switch open the circuit by transmitting a second signal to the circuit.