Abstract: A communication apparatus includes a communication unit, an operation unit, and a recording unit. The communication unit is for communicating with other communication apparatuses. The operation unit is for generating an operation signal corresponding to a user's operation. The recording unit is for recording immediate environmental sound and generating an audio file. The audio file is sent to the other communication apparatuses when the communication unit receives an incoming call from the other communication apparatuses and the operation unit does not receive a user's operation responding to the incoming call. A communication method is also provided.

Abstract: A controlling circuit and a controlling method are disclosed. The controlling circuit includes a plurality of switches and a comparator. The first terminals of the switches are respectively coupled to one of a plurality of LED channels. The switches are conducted according to a plurality of switching signals respectively, wherein the switching signals are asserted alternately. The first input terminal of the comparator is coupled to the second terminals of the switches and the second input terminal of the comparator receives a reference voltage for the comparator to compare the voltage of the first input terminal with the voltage of the second input terminal so as to output a comparison result. In this way, whether the LED channels work abnormally or not may be detected. In addition, the hardware cost may also be reduced by employing fewer comparators through a sharing mode.

Abstract: A battery charger with an overvoltage protection circuitry is electrically coupled to a power source and a battery. The battery charger with the overvoltage protection circuitry includes a switching circuit. The switching circuit comprises a first switching element, a second switching element, a Zener diode, and a resistor. The first switching element includes a first terminal coupled to the power source, a control terminal, and a second terminal coupled to the battery. The second switching element includes a first terminal coupled to the control terminal of the first switching element, a control terminal, and a second terminal coupled to the first terminal of the first switching element. The Zener diode includes a cathode coupled to the control terminal of the second switching element and an anode grounded. The resistor includes a first terminal coupled to the control terminal of the first switching element and a second terminal grounded.

Abstract: A current detection apparatus including a current detection circuit, a voltage regulation power supply circuit, and a package carrier is disclosed. The current detection circuit has a reference terminal and a detection terminal. The voltage regulation power supply circuit is used to generate an output voltage and includes a current transmission terminal for transmitting a current. The package carrier is used to carry the current detection circuit, the voltage regulation power supply circuit, a reference pad, and a current transmission pad. The package carrier includes at least one common voltage lead. The current transmission pad is coupled to the reference pad through at least one bonding wire such that an equivalent resistance is formed on the coupling path between the current transmission pad and the reference pad.

Abstract: A communication apparatus includes a communication unit, an operation unit, and a recording unit. The communication unit is for communicating with other communication apparatuses. The operation unit is for generating an operation signal corresponding to a user's operation. The recording unit is for recording immediate environmental sound and generating an audio file. The audio file is sent to the other communication apparatuses when the communication unit receives an incoming call from the other communication apparatuses and the operation unit does not receive a user's operation responding to the incoming call. A communication method is also provided.