Abstract: A computer system and a processing method thereof of sound signal are provided. The computer system includes a platform path controller (PCH), a high-definition audio (HDA) codec, and a digital microphone. The HDA codec is coupled to the PCH. The digital microphone is coupled to the PCH and the HDA codec. The digital microphone is used to generate sound signal. The HDA codec processes the sound signal from the digital microphone. Accordingly, the audio recording with high quality could be provided.

Abstract: A data transmission system is disclosed. The data transmission system includes at least one signal processing device, at least one conversion device, at least one antenna device, and at least one flexible printed circuit board. The at least one signal processing device is configured to generate or receive at least one data. The at least one conversion device is configured to transform between the at least one data and an optical signal. The at least one antenna device is configured to obtain the at least one data according to the optical signal, and configured to receive or transmit the at least one data wirelessly. The at least one flexible printed circuit board includes at least one conductive layer and at least one optical waveguide layer. The at least one optical waveguide layer is configured to transmit the optical signal.

Abstract: An amplifier DC bias protection circuit includes an amplifier module, a filter module and a comparator module. The amplifier module converts an input signal into a non-inverting signal and an inverting signal. The filter module blocks AC signals in the non-inverting signal and the inverting signal, thereby providing a first DC bias signal and a second DC bias signal accordingly. The comparator module is configured to determine whether the absolute value of a DC bias difference signal is greater than a predetermined value, and output a determination signal for deactivating the amplifier module when the absolute value of the DC bias difference signal is greater than the predetermined value. The DC bias difference signal is associated with the voltage difference between the first DC bias signal and the second DC bias signal.

Abstract: A light-emitting diode structure and a method for manufacturing the light-emitting diode structure. The method includes steps of: preparing a metal plane blank in a production line and punching the blank with an upper mold section to form a concave central section protruding from the blank; punching the concave central section with a lower mold section in a reverse direction, whereby a bottom of the central section is formed with at least one rigid wall defining a cavity; pressing a predetermined position of the central section with another upper mold section in a direction the same as the moving direction of the upper mold section to form a bowl seat on the central section for fixing a chip in the bowl seat; and forming a grid structure on a periphery of the central section so as to complete a model body. The model body has a central section and a connecting section. The central section has a bowl seat for fixing therein a chip. The central section is defined as a cathode end.