Abstract: A circuit includes a voltage divider circuit configured to generate a feedback voltage according to an output voltage, an operational amplifier configured to output a driving signal according to the feedback voltage and a reference voltage and a pass gate circuit including multiple current paths. The current paths are controlled by the driving signal and connected in parallel between the voltage divider circuit and a power reference node.

Abstract: A power sequence monitoring system is disclosed, and comprises: a microprocessor and a control module. The microprocessor comprises a first conversion unit and a second conversion unit. The first conversion unit is used for converting a power-on signal received from a power management chip to a first digital signal, and the second conversion unit is adopted for converting a power-off signal received form the power management chip to a second digital signal. After receiving the first digital signal and the second digital signal from the microprocessor, and the control module outputs a plurality of power monitoring data to an electronic device, such that a user easily knows the power signal state of the host computer by the system of the present invention.

Abstract: A system for visualizing power signal sequence is disclosed, and comprises: a microprocessor and a control module. The microprocessor comprises a first conversion unit and a second conversion unit. The first conversion unit is used for converting a power-on signal received from a power management chip to a first digital signal, and the second conversion unit is adopted for converting a power-off signal received form the power management chip to a second digital signal. After receiving the first digital signal and the second digital signal from the microprocessor, and the control module outputs a plurality of power monitoring data to an electronic device, such that a user easily knows the power signal state of the host computer by the system of the present invention.

Abstract: A projector having a first housing, a second housing, a projector mainframe, a lamp module and a connector pair is disclosed. The removabl lamp module is installed in the first housing which forms part of the projector housing. The projector mainframe is enclosed in the second housing which forms the other part of the projector housing. The connector pair comprises a first half connector and a second half connector, which can be fixed to or separated from each other. The first half connector connected to the lamp module is movable with respect to the second half connector fixed to the projector mainframe. When the first and second half connector are mechanically coupled, the lamp module is then mechanically coupled with the projector mainframe such that the projector can be successfully assembled.