Abstract: A testing system for testing a charging circuit includes a setting unit, a virtual battery, and a control device. The setting unit is utilized for setting a charging configuration of the charging circuit according to a battery status message, to make the charging circuit to output a charging power accordingly. The virtual battery includes a battery status generating unit for generating the battery status message according to a first control signal, and a load unit for generating a load for the charging circuit according to a second control signal, so as to receive the charging power outputted from the charging circuit, and recording variation of the charging power. The control device is utilized for generating the first control signal and the second control signal, and storing information recorded by the load unit as a digital data for evaluate the charging circuit.

Abstract: A portable computer system includes a host, a power storage device and a dock. The power storage device is installed in the host, for sensing current from a first power socket to a first power terminal to generate a first sensing result, and charging a first rechargeable battery according to a first control signal. The dock is capable of connecting to the host by means of insertion, for sensing current from a second power socket to a second power terminal to generate a second sensing result, and charging a second rechargeable battery according to a second control signal. The dock includes a control device for outputting the first control signal and the second control signal according to the first sensing result and the second sensing result, to control charging operations on the first rechargeable battery and the second rechargeable battery.

Abstract: A power signal detecting system and method thereof are disclosed. The power signal detecting system comprises a power supply and a portable electronic device. The portable electronic device is electrically connected with the power supply to receive a power signal. The portable electronic device comprises a sensing element, a detecting module and a power management module. The sensing element is used to connect the power signal. The detecting module is electrically connected to the sensing element and is used for detecting the power signal. The power management module electrically connects to the detecting module and is used for executing a power management for the portable electronic device by identifying the power signal.

Abstract: A power management device for a computer system includes a detection unit coupled to a peripheral interface of the computer system for detecting whether a portable electronic device is coupled to the peripheral interface when the computer system is shut down, to generate a detection result, and a control unit coupled to the detection unit and a power supply device of the computer system for controlling the power supply device to output a charge current to the portable electronic device via the peripheral interface when the detection result indicates that the portable electronic device is coupled to the peripheral interface.

Abstract: A multi-signal connector includes a first tuner, a first demodulator, a first radio frequency signal pin, a first ground signal pin and digital signal pins, and the first radio frequency signal pin transmits a first radio frequency signal. The first tuner receives the first radio frequency signal and outputs a first digital signal. The first demodulator receives the first digital signal and outputs an MPEG signal via the digital signal pins. The ground signal pin is disposed between the first radio frequency signal pin and the digital signal pins for reducing the interference and noise between the first radio frequency signal and the MPEG signal. A digital signal processing system is also disclosed.