Abstract: A signal processing system applicable to an electronic system having a storage unit, an indicator light, and a driving circuit includes a first signal processing unit, a second signal processing unit, and a signal computing unit. The indicator light will light up, if the electronic system does not access the storage unit for data. The first signal processing unit is electrically connected to the driving circuit and configured to receive a first pulse signal while the electronic system is accessing the storage unit for data, charge/discharge and transform the first pulse signal, to output a second pulse signal. The second signal processing unit receives the second pulse signal, charges/discharges and transforms the second pulse signal, to output a third pulse signal. The signal computing unit receives and computes the second and third pulse signals to generate a fourth pulse signal for driving the indicator light to perceivably glitter.

Abstract: A method and a control circuit for reducing an instantaneous startup current of a computer system by decreasing a fan rotational speed are provided. The computer system comprises a management controller coupled to a fan device through a tri-state buffer. In the present method, a duty cycle of a first PWM signal is reduced by the management controller. After that, the tri-state buffer is enabled to pass the first PWM signal with the reduced duty cycle to the fan device. Finally, the fan device is powered with the first PWM signal when the computer system is powered on. By reducing the duty cycle of the PWM signal before powering the computer system and turning on the fan device, the fan rotational speed of the fan device can be decreased when the computer system is powered on. As a result, the instantaneous startup current of the computer system can be reduced.

Abstract: A switch device applicable to a server has at least a display chip set, a switch unit, a logic unit, a first connector and a second connector. The display chip set is used to provide a plurality of video signals. The switch unit and the logic unit are connected to the display chip set to receive at least one of the video signals and switch an output path of the received video signal. The first connector and the second connector are connected to the switch unit and the logic unit for selectively connecting to a display, thereby allowing a server to operate with double display connectors. The two connectors are positioned at different sides of the server, which makes it convenient for the management and maintenance of the server.

Abstract: A system for controlling sequential startup of hard disks applicable to an electronic system with at least a first set of hard disks and a second set of hard disks is provided. A power supply module is used to provide a first power signal to the first set of hard disks to startup the first set of hard disks. A processing module is used to receive the first power signal provided by the power supply module and perform a delaying process on the first power signal to generate a delayed power signal and perform an adjustment process to the delayed power signal to generate a second power signal for outputting to the second set of hard disks, so that the first set of hard disks and the second set of hard disks can be started up sequentially.

Abstract: A basic input output system (BIOS) selection device is applicable in an electronic device. The BIOS selection device includes a storage unit and a control unit, which are mounted on a mainboard of the electronic device. The storage unit includes a first chip and a second chip, each of which includes a primary BIOS module and a secondary BIOS module. The control unit includes a signal module for producing a first chip selection signal and a second chip selection signal, and a switch module having a first switch component and a second switch component. The BIOS selection device can realize two dual BIOS mechanisms on the same mainboard for a user to select one of the dual BIOS mechanisms to boot the electronic device without having to purchase another mainboard for using a different dual BIOS mechanism unlike the prior art.

Abstract: A method for reducing instantaneous current on startup is applicable to an electronic device with a management controller. The management controller is electrically connected to a startup processing module of the electronic device such that operations of fans equipped in the electronic device can be controlled via this electrical connection relationship. When the electronic device is turned on, operations of the fans in the electronic device are disabled by the startup processing module. Then, when power is detected by the management controller, the smallest amount of current possible for operations of the fans for heat-dissipating purpose is generated by the management controller. Finally, hardware components in the electronic device are initialized by the management controller. The above method solves the problem of system instability due to large instantaneous current on startup in the prior art.

Abstract: A method and a control circuit for reducing an instantaneous startup current of a computer system by decreasing a fan rotational speed are provided. The computer system comprises a management controller coupled to a fan device through a tri-state buffer. In the present method, a duty cycle of a first PWM signal is reduced by the management controller. After that, the tri-state buffer is enabled to pass the first PWM signal with the reduced duty cycle to the fan device. Finally, the fan device is powered with the first PWM signal when the computer system is powered on. By reducing the duty cycle of the PWM signal before powering the computer system and turning on the fan device, the fan rotational speed of the fan device can be decreased when the computer system is powered on. As a result, the instantaneous startup current of the computer system can be reduced.

Abstract: A riser card identification system identifies a riser card electrically connected with a computer system having a BIOS and a storage unit. The system includes a setting unit, a signal generating unit for generating a waveform signal according to a control signal output by the computer system, a charging/discharging unit built inside the riser card for performing a charging/discharging process to convert the waveform signal into an analog signal, a signal comparing unit for comparing the analog signal with a reference signal output by the computer system and generating a digital signal, and a signal reading unit for reading duty cycle of the digital signal. The charging/discharging unit has a characteristic value as an identification mark of the riser card corresponding to the charging/discharging unit. Therefore, the BIOS is able to identify the riser card according to the read duty cycle and information stored in the storage unit.

Abstract: A signal processing system applicable to an electronic system having a storage unit, an indicator light, and a driving circuit includes a first signal processing unit, a second signal processing unit, and a signal computing unit. The indicator light will light up, if the electronic system does not access the storage unit for data. The first signal processing unit is electrically connected to the driving circuit and configured to receive a first pulse signal while the electronic system is accessing the storage unit for data, charge/discharge and transform the first pulse signal, to output a second pulse signal. The second signal processing unit receives the second pulse signal, charges/discharges and transforms the second pulse signal, to output a third pulse signal. The signal computing unit receives and computes the second and third pulse signals to generate a fourth pulse signal for driving the indicator light to perceivably glitter.

Abstract: A bus width automatic adjusting method and system is proposed, which is designed for use with a computer platform for providing the computer platform with a bus width automatic adjusting function; and which is characterized by dividing the bus of the interface controller on the computer platform and the bus of each connecting slot into two half-width portions such that the two half-width portions of the bus of the interface controller can be selectively connected to either just one slot or two slots depending on the current card plugging status of the slots on the motherboard of the computer platform. This feature allows the user to plug just one circuit card to one connecting slot on the motherboard or two circuit cards respectively to two connecting slots on the motherboard, and notwithstanding allow the plugged circuit board(s) to function normally and operate at the optimal data transmission rate.

Abstract: A system for controlling sequential startup of hard disks applicable to an electronic system with at least a first set of hard disks and a second set of hard disks is provided. A power supply module is used to provide a first power signal to the first set of hard disks to startup the first set of hard disks. A processing module is used to receive the first power signal provided by the power supply module and perform a delaying process on the first power signal to generate a delayed power signal and perform an adjustment process to the delayed power signal to generate a second power signal for outputting to the second set of hard disks, so that the first set of hard disks and the second set of hard disks can be started up sequentially.

Abstract: A method for reducing instantaneous current on startup is applicable to an electronic device with a management controller. The management controller is electrically connected to a startup processing module of the electronic device such that operations of fans equipped in the electronic device can be controlled via this electrical connection relationship. When the electronic device is turned on, operations of the fans in the electronic device are disabled by the startup processing module. Then, when power is detected by the management controller, the smallest amount of current possible for operations of the fans for heat-dissipating purpose is generated by the management controller. Finally, hardware components in the electronic device are initialized by the management controller. The above method solves the problem of system instability due to large instantaneous current on startup in the prior art.

Abstract: A riser card identification system identifies a riser card electrically connected with a computer system having a BIOS and a storage unit. The system includes a setting unit, a signal generating unit for generating a waveform signal according to a control signal output by the computer system, a charging/discharging unit built inside the riser card for performing a charging/discharging process to convert the waveform signal into an analog signal, a signal comparing unit for comparing the analog signal with a reference signal output by the computer system and generating a digital signal, and a signal reading unit for reading duty cycle of the digital signal. The charging/discharging unit has a characteristic value as an identification mark of the riser card corresponding to the charging/discharging unit. Therefore, the BIOS is able to identify the riser card according to the read duty cycle and information stored in the storage unit.

Abstract: A method for automatically adjusting bus widths for a first slot and a second slot of a riser card according to the number of interface cards inserted to the slots. Half of the bus width for the first slot is predetermined for transferring signals. First, a detecting unit detects whether an interface card is inserted in the second slot of the riser card, if so, the detecting unit outputs a second slot enabling signal, or else, the detecting unit outputs a second slot disabling signal. A control unit is used for receiving the second slot enabling signal or the second slot disabling signal, and enabling half of the bus width for the second slot for transferring signals if the second slot enabling signal is received, or enabling the other half of the bus width for the first slot for transferring signals if the second slot disabling signal is received.

Abstract: A basic input output system (BIOS) selection device is applicable in an electronic device. The BIOS selection device includes a storage unit and a control unit, which are mounted on a mainboard of the electronic device. The storage unit includes a first chip and a second chip, each of which includes a primary BIOS module and a secondary BIOS module. The control unit includes a signal module for producing a first chip selection signal and a second chip selection signal, and a switch module having a first switch component and a second switch component. The BIOS selection device can realize two dual BIOS mechanisms on the same mainboard for a user to select one of the dual BIOS mechanisms to boot the electronic device without having to purchase another mainboard for using a different dual BIOS mechanism unlike the prior art.

Abstract: A switch device applicable to a server has at least a display chip set, a switch unit, a logic unit, a first connector and a second connector. The display chip set is used to provide a plurality of video signals. The switch unit and the logic unit are connected to the display chip set to receive at least one of the video signals and switch an output path of the received video signal. The first connector and the second connector are connected to the switch unit and the logic unit for selectively connecting to a display, thereby allowing a server to operate with double display connectors. The two connectors are positioned at different sides of the server, which makes it convenient for the management and maintenance of the server.

Abstract: A fan controlling system applicable in an electronic system having a plurality of fans is disclosed. The fan-controlling system includes a first signal generating module and a second signal generating module for generating a first and a second pulse width modulation (PWM) signals according to control instructions output by the electronic system. The fan-controlling system further includes a phase-inverting module and a delay module. Therefore, PWM signals, which are delayed with a time interval one another, can be generated by the fan controlling system, so as to respectively control a plurality of fans of the electronic system, thereby avoiding the peak value of the total power signals when the fans are run from increasing instantly, and power signal for supplying the electronic system from decreasing instantly, making the electronic system run abnormally, and its stability becomes worse.