Abstract:
A non-isolated power supply device and a method for controlling the same, wherein only one DC voltage bus is adopted and the neutral lines of the input voltage and output voltage are directly connected together. During the periods that the voltage polarities of the input voltage and output voltage are not the same, the power supply device is operated in a flyback mode to avoid the generation of an abnormal current. Otherwise, during the periods that the voltage polarities of the input voltage and output voltage are the same, the power supply device is operated in a boost mode to derive a superior efficiency.
Abstract:
A cup assembly includes a paper cup and a plastic lip is formed on the periphery of the open top of the cup. The lip includes a first spiral portion formed thereon. A cap has a second spiral portion formed on an inside thereof and the second spiral portion is engaged with the first spiral portion. The cap is easily removed from or mounted to the cup without shaking the cup to prevent the coffee or juice in the cup from splitting out.
Abstract:
An online firmware update system and its control interface. The control interface couples to microprocessor, built-in storage unit, and rewritable memory. The control interface includes multiplexer, control register, and bus interface unit. The multiplexer includes selection terminal, output terminal, and control signal input terminal. When the control signal enables the selection terminal, a write signal is sent to the rewritable memory. The control register is located in built-in storage unit and coupled to microprocessor and multiplexer. The control register temporarily stores the control signal. The bus interface unit couples to microprocessor, built-in storage unit, and control register in the built-in storage unit. The bus interface unit has a determination rule to define that only when a fetch signal sent by microprocessor is received, and the received control signal is in an enable state, and a fetch address of the microprocessor is equal to mapping address of built-in storage unit.