Abstract: A system for file sharing includes a file integration service program and a dongle device. The file integration service program is installed in a first electrical device and provides to-be-shared files accessible by the first electrical device. The dongle device includes a hot-plug port, a microcontroller and a wireless communication module. The hot-plug port is for coupling to a second electrical device. When the hot-plug port is coupled to the second electrical device, the microcontroller disassembles and packages a first instruction with a SCSI standard from the second electrical device into the first instruction with a wireless communication standard. The wireless communication module transmits the first instruction with the wireless communication standard to the first electrical device, so that the second electrical device can access the to-be-shared files via the dongle device.

Abstract: An amplifier circuit and a method of signal amplification are provided. The amplifier circuit includes a first amplifier and a charge pump. The first amplifier includes a first terminal, a second terminal, and a third terminal. The first terminal is coupled to a first external voltage. The second terminal is coupled to a negative voltage. The third terminal is coupled to a ground reference voltage. The charge pump is coupled to the first amplifier for providing the negative voltage transformed from a second external voltage.

Abstract: A remote controller including a wireless communication module, an image capture module and a host processor is provided. The wireless communication module is for communicating with a be-controlled appliance. The image capture module is for photographing and generating an image signal. The host processor is for performing a remote control function to control the be-controlled appliance, and processing the image signal to transmit to the be-controlled appliance via the wireless communication module to be post-processed.

Abstract: An amplifier circuit and a method of signal amplification are provided. The amplifier circuit includes a first amplifier and a charge pump. The first amplifier includes a first terminal, a second terminal, and a third terminal. The first terminal is coupled to a first external voltage. The second terminal is coupled to a negative voltage. The third terminal is coupled to a ground reference voltage. The charge pump is coupled to the first amplifier for providing the negative voltage transformed from a second external voltage.