摘要:
A light circuit includes a light unit (7), a control unit (3), a differentiating circuit (4) and a switching circuit (6). The light unit includes a plurality of light branches (L1, L2 . . . and Ln) connected in parallel. The light branches are controlled to light by the switching circuit that is enabled and disabled by PWM waves from the control unit. The PWM waves are differentiated into differentiated waves by the differentiating circuit before outputted to control the switching circuit.
摘要:
A sound signal generator testing apparatus is provided. The apparatus includes a hermetic seal (2), a sound signal input unit (4), and at least a noise suppression unit (5). The sound signal input unit is for receiving sound signals transmitted from a sound signal generator (1) under testing. Each noise suppression unit includes a sound signal input unit, a low pass filter, an inverter, and an output. The sound signal input unit is for receiving sound signals. The low pass filter is for filtering the sound signals by passing the low frequencies of the sound signals that are below a predetermined value. The inverter is for inverting phases of the sound signals transmitted from the low pass filter and producing inverted sound signals. The output unit is placed behind the sound signal input unit for outputting the inverted sound signals.
摘要:
A touch sensing apparatus includes a sensor (13), an AC signal source (14), a gate circuit (15) with two inputs, a first load circuit (18), a second load circuit (19) and a detector (16). The alternating current (AC) signal source is for outputting AC signals to the two input of the gate circuit. The sensor and the first and second load circuits are configured to enable the input signals to the two inputs of the gate circuit to be completely in phase and have same frequency and same duty cycle, and the gate circuit produces the first output type signal. The sensor receives electricity signals from the object and results in the gate circuit outputting a second output type signal. The detector detects the change of the output signal of the gate circuit from the first type to the second type and accordingly identifies a touch on the sensor.
摘要:
A method for obtaining technical information of IC is disclosed. The method provides an IC, a test board, and a computer. The IC includes a memory. The memory stores technical information. Connect the IC to the test board. Connect the test board to the computer. The computer obtains the technical information from the memory of IC. Using this method, engineers can find the technical information of the IC conveniently and correctly.
摘要:
A sound output apparatus is provided. The sound output apparatus includes a memory for storing compensation parameters; a Universal Serial Bus (USB) interface connecting to an external audio signal generating device; a USB controller for reading the compensation parameters from the memory and transferring the compensation parameters to the external audio signal generating device when the external audio signal generating device is connected thereto, and receiving regulated audio signals from the external audio signal generating device according to the compensation parameters; a digital/analog (D/A) converter for converting the regulated audio signals into analog audio signals; an amplifier for amplifying the analog audio signals; and a sound output unit for outputting sounds corresponding to the audio signals.
摘要:
A synchronous rectification and voltage stabilization circuit includes a saturable inductance coil (L1), a synchronous rectifier switch (33), a driving coil (L2) for turning on the synchronous rectifier switch, a discharging coil (L3) which co-operates with a controllable switching component (Q1) to turn off the synchronous rectifier switch, a filter circuit (40) and a voltage stabilization circuit (50). The saturable inductance coil, the synchronous rectifier switch and the filter circuit are connected in serial between an input terminal (10) and an output terminal (20). The saturable inductance coil is coiled together with the driving coil and the discharging coil on one core. The voltage stabilization circuit is connected between the output terminal and the saturable inductance coil, and is used for regulating a regulable saturation point of the saturable inductance coil according to an output voltage of the output terminal and a target value of the output voltage.
摘要:
A touch sensing apparatus includes a signal source for generating an alternating current signal, a conductor connected to the signal source, a sensor for receiving a noise generated by a contact of an object. The sensor together with the conductor form a simulated capacitor that results in alternating current signal flowing through the sensor when the sensor is contacted by the object. A detector has a first input end and a second input end. The detector results in voltage differences between the first and second input ends thereof when receiving the alternating current signal output from the sensor, and thus output a signal. A rectifying circuit is used for rectifying the alternating current signal generated by the signal source and simultaneously generating a noise. One end of the rectifier circuit is connected to the signal source and other end of the rectifier circuit is connected to the negative power input end of the detector.
摘要:
A signal conveying apparatus (20) connects with a power supply unit (10) and a display device (30). The signal conveying apparatus includes a plurality of input interfaces (221), a signal converting unit (24), and an output interface (261). The input interfaces receive signals from external electronic devices. The signal converting unit integrates and converts the signals received by the input interfaces to a format that can be received by the display device. The output interface receives the converted signals from the signal converting unit and outputs the converted signals to the display device.
摘要:
A lamp includes a lamp body, an LED light source, a storage unit, a switch apparatus, and a microprocessor. The storage unit stores a function table recording a relationship between a plurality of types of touches and a plurality of control functions. The switch apparatus includes a touch panel, a touch controller, and an indicator located under the first touch region. The touch panel generates signals in response to touches applied on thereon. The touch panel includes a first touch region and a second touch region. The touch controller receives the signals and determines the type of the touch intended. The microprocessor refers to the function table, and controls the LED light source to execute the control function and to give visual feedback when the touch panel is touched. A switch apparatus is also provided.
摘要:
A touch control method used for an electronic device storing a relationship table recording a mapping relationship between handwritten touch input and a number of commands includes the following steps. Display an electronic file. Sense a touch trace of a user on the displayed electronic file and generating a trigger signal if the touch trace forms a closed loop having an enclosed region. Sense handwritten touch input by the user within the enclosed region and generate associated signals. Recognize a circled path having an enclosed region as input by the user according to the generated signals. Determine a command associated with the sensed handwritten touch input according to the relationship table in response to the trigger signal. Retrieve content of the displayed electronic file displayed within the enclosed region. And execute the retrieved command to the retrieved content. An electronic device using the method is also provided.