摘要:
A switching regulator includes an input terminal, a first time delay circuit, a first switch circuit, and an output terminal. The input terminal is for receiving an input current. The first time delay circuit is for delaying the input current. The first switch circuit is for receiving a first power-on voltage, and allowing the input current to flow therethrough. The output terminal is for outputting the input current.
摘要:
A method for testing voltage endurance of a electronic component, includes: generating an oscillating signal; amplifying the oscillating signal; transforming the amplified oscillating signal to generate a transformed signal; blocking a negative voltage of the transformed signal to generate a test signal to be transmitted to the electronic component; and detecting electrical characteristics of the electronic component to generate result data.
摘要:
A three-phase AC voltage regulator is for adjusting a line voltage on transmission lines. The three-phase AC voltage regulator includes a sampling circuit, a reference-voltage circuit, a comparator, a switch, a power supply, and a compensator. The sampling circuit is for sampling the line voltage. The reference-voltage circuit is for receiving a line-to-line voltage from the transmission lines and generating a standard voltage. The comparator is for comparing the line voltage and the standard voltage to obtain a signal. The switch is for being turned on or off based on the signal. The power supply is for supplying various electric powers to the compensator. The compensator is for receiving the electric power and generating compensating voltages. The compensating voltages are used to compensate the line voltage.
摘要:
A ballast includes a drive circuit, a half-bridge inverter, a transformer, and a filter. The drive circuit is configured for generating a drive signal on receiving a power. The half-bridge inverter is configured for generating a power AC signal according to the drive signal generated by the driver. The power AC signal is fed back to the drive circuit, for determining a non-overlap time of the drive signal. The transformer is configured for generating a high frequency signal based on the power AC signal. The high frequency signal is configured for lightening a lamp, and maintaining the lightening of the lamp. The filter is used for filtering out noise in the feedback power AC signal.
摘要:
A power factor correction apparatus is for correcting a power factor of transmission lines. The power factor correction apparatus includes a switch, a compensator, a detecting apparatus, a voltage processing circuit, a voltage comparison unit, and a time-delay unit. The switch is electrically connected to the transmission lines. The compensator is electrically connected to the switch for compensating the power factor. The detecting apparatus is electrically connected to the transmission lines for detecting voltages transmitted in the transmission lines. The voltage processing circuit electrically is connected to the detecting apparatus and the switch. The voltage processing circuit includes a voltage comparison unit and a time-delay unit. The voltage comparison unit is electrically connected to the detecting apparatus for comparing the voltages with each other to generate a voltage. The time-delay unit is electrically connected to the voltage comparison unit and the switch delaying the voltage.
摘要:
An electronic load includes a current control circuit and an interface circuit. The current control circuit is used for receiving a voltage, and outputting a measured current. The interface circuit is coupled to the current control circuit, for receiving the measured current, and providing an interface for instruments. The current control circuit and the interface circuit are coupled to a power supply being tested.
摘要:
A power source module is assembled on a main printed circuit board. The power source module comprises an input processing circuit, a PFC/PWM control circuit, a conversion circuit, and an output processing circuit. The input processing circuit is for rectifying an alternating current voltage to be a primary direct current voltage. The PFC/PWM control circuit is for modulating the primary direct current voltage. The PFC/PWM control circuit is assembled on a subsidiary printed circuit board electrically connected to the main printed circuit board. The conversion circuit is for converting the primary direct current voltage to be a secondary direct current voltage. The output processing circuit is for rectifying and filtering the secondary direct current voltage.
摘要:
A keyboard with definable keystroke values is provided. The keyboard includes an output interface for connecting to a keyboard interface of a host computer; keycaps for receiving operational inputs; a signal generation unit for generating keystroke signals in response to the operational inputs on the keycaps; a storage unit; and a micro control unit (MCU). The MCU includes a defining module for defining keystroke mappings between keystrokes and keystroke values in a user-defined keystroke mode, and storing the keystroke mapping into the storage unit; and an output control module for receiving the keystroke signals from the signal generation unit, reading the corresponding mapped keystroke values from the keystroke mapping stored in the storage unit in the user-defined keystroke mode, and outputting the mapped keystroke values to the keyboard interface of the host computer through the output interface.
摘要:
A measuring apparatus includes a storing module, a measuring module, and a processing module. The storing module is used for storing maximum coulombs of the rechargeable electrical energy storage device, and a relation of various standard voltage and percentages of the remaining coulombs to the maximum coulombs. The measuring module is used for measuring an initial voltage of the rechargeable electrical energy storage device, and retrieving initial charged coulombs from the storing module. The processing module is used for calculating charged coulombs and discharged coulombs, and calculating the remaining coulombs of the rechargeable electrical energy storage device based on the charged coulombs or the discharged coulombs and the initial charged coulombs and updating the storing module with the remaining coulombs. A measuring method and an electronic device including a measuring apparatus for measuring the remaining coulombs are also disclosed.