Abstract: An amplifying apparatus includes a zero point generating circuit, a level shift circuit, a transistor, and an amplifying circuit. A first terminal of the zero point generating circuit is coupled to an output terminal of the amplifying apparatus. A first terminal of the level shift circuit is coupled to the output terminal of the amplifying apparatus. A first terminal of the transistor is coupled to a supply voltage. A second terminal of the transistor is coupled to the output terminal of the amplifying apparatus. A control terminal of the transistor is coupled to a second terminal of the level shift circuit. An input terminal of the amplifying circuit is coupled to an input terminal of the amplifying apparatus. An output terminal of the amplifying circuit is coupled to the output terminal of the amplifying apparatus.

Abstract: An amplifying apparatus includes a zero point generating circuit, a level shift circuit, a transistor, and an amplifying circuit. A first terminal of the zero point generating circuit is coupled to an output terminal of the amplifying apparatus. A first terminal of the level shift circuit is coupled to the output terminal of the amplifying apparatus. A first terminal of the transistor is coupled to a supply voltage. A second terminal of the transistor is coupled to the output terminal of the amplifying apparatus. A control terminal of the transistor is coupled to a second terminal of the level shift circuit. An input terminal of the amplifying circuit is coupled to an input terminal of the amplifying apparatus. An output terminal of the amplifying circuit is coupled to the output terminal of the amplifying apparatus.

Abstract: An amplifying apparatus and a voltage-to-current conversion apparatus are provided. The amplifying apparatus includes a zero point generating circuit, a level shift circuit, a transistor, and an amplifying circuit. A first terminal of the zero point generating circuit is coupled to an output terminal of the amplifying apparatus. A first terminal of the level shift circuit is coupled to the output terminal of the amplifying apparatus. A first terminal of the transistor is coupled to a supply voltage. A second terminal of the transistor is coupled to the output terminal of the amplifying apparatus. A control terminal of the transistor is coupled to a second terminal of the level shift circuit. An input terminal of the amplifying circuit is coupled to an input terminal of the amplifying apparatus. An output terminal of the amplifying circuit is coupled to the output terminal of the amplifying apparatus.

Abstract: An amplifying apparatus and a voltage-to-current conversion apparatus are provided. The amplifying apparatus includes a zero point generating circuit, a level shift circuit, a transistor, and an amplifying circuit. A first terminal of the zero point generating circuit is coupled to an output terminal of the amplifying apparatus. A first terminal of the level shift circuit is coupled to the output terminal of the amplifying apparatus. A first terminal of the transistor is coupled to a supply voltage. A second terminal of the transistor is coupled to the output terminal of the amplifying apparatus. A control terminal of the transistor is coupled to a second terminal of the level shift circuit. An input terminal of the amplifying circuit is coupled to an input terminal of the amplifying apparatus. An output terminal of the amplifying circuit is coupled to the output terminal of the amplifying apparatus.

Abstract: A capacitor circuit includes a first terminal, a first to a third transistor and a first capacitor. The first transistor includes a first terminal configured to be coupled to a first current source and the first terminal of the capacitor circuit, and a second terminal coupled to a reference voltage terminal. The second transistor includes a first terminal configured to be coupled to a second current source, a second terminal coupled to the reference voltage terminal, and a control terminal coupled to the first terminal of the second transistor and a control terminal of the first transistor. The third transistor includes a first terminal configured to be coupled to a third current source and the first terminal of the first transistor, a second terminal coupled to the reference voltage terminal, and a control terminal coupled to the control terminal of the second transistor.

Abstract: A mixer module includes a mixer, at least one DC offset circuit, a filter and a controller. The mixer mixes an input signal to generate a first signal. The at least one DC offset circuit generates a second signal based on the first signal. The filter filters out an AC portion of the second signal and generates a third signal according to a DC portion of the second signal. The controller controls the at least one DC offset circuit based on the third signal to reduce a DC portion of the first signal.

Abstract: An amplifier including a signal input terminal, at least one signal output terminal, a first and a second cascode amplifier circuits, a capacitor and a loading circuit. The signal input terminal receives an input signal. The first cascode amplifier circuit includes a first and a second input terminals and a first and a second output terminals. The first input terminal coupled to the signal input terminal receives the input signal. The second cascode amplifier circuit includes a third and a fourth input terminals and a third output terminal. The third input terminal is coupled to the first output terminal, and the third output terminal is coupled to the second input terminal. Two terminals of the capacitor are coupled to the fourth input terminal and the first output terminal respectively. A terminal of the loading circuit is coupled to the third output terminal, and another terminal of the loading circuit is coupled to the second output terminal.

Abstract: A capacitor circuit includes a first terminal, a first to a third transistor and a first capacitor. The first transistor includes a first terminal configured to be coupled to a first current source and the first terminal of the capacitor circuit, and a second terminal coupled to a reference voltage terminal. The second transistor includes a first terminal configured to be coupled to a second current source, a second terminal coupled to the reference voltage terminal, and a control terminal coupled to the first terminal of the second transistor and a control terminal of the first transistor. The third transistor includes a first terminal configured to be coupled to a third current source and the first terminal of the first transistor, a second terminal coupled to the reference voltage terminal, and a control terminal coupled to the control terminal of the second transistor.

Abstract: A mixer module includes a mixer, at least one DC offset circuit, a filter and a controller. The mixer mixes an input signal to generate a first signal. The at least one DC offset circuit generates a second signal based on the first signal. The filter filters out an AC portion of the second signal and generates a third signal according to a DC portion of the second signal. The controller controls the at least one DC offset circuit based on the third signal to reduce a DC portion of the first signal.

Abstract: An amplifier including a signal input terminal, at least one signal output terminal, a first and a second cascode amplifier circuits, a capacitor and a loading circuit. The signal input terminal receives an input signal. The first cascode amplifier circuit includes a first and a second input terminals and a first and a second output terminals. The first input terminal coupled to the signal input terminal receives the input signal. The second cascode amplifier circuit includes a third and a fourth input terminals and a third output terminal. The third input terminal is coupled to the first output terminal, and the third output terminal is coupled to the second input terminal. Two terminals of the capacitor are coupled to the fourth input terminal and the first output terminal respectively. A terminal of the loading circuit is coupled to the third output terminal, and another terminal of the loading circuit is coupled to the second output terminal.

Abstract: A signal transmitter includes a modulation circuit, a signal separation circuit, and a signal combining circuit. The modulation circuit modulates a first signal to a modulated signal. The signal separation circuit separates the modulated signal into N separated signals. The N separated signals have different phases. The signal combining circuit combines the N separated signals to eliminate at least one order of harmonic signals of the N separated signals so as to generate an output signal.

Abstract: A time synchronization method is provided. Firstly, an update time of a second playing device is calculated according to a first system time of transmitting a first packet from a first playing device and a second system time of receiving the first packet by the second playing device. Then, a first difference value is calculated according to the first system time of transmitting a second packet from the first playing device and the update time corresponding to the reception of the second packet by the second playing device. If plural first difference values are all smaller than a first predetermined value, a second difference value is calculated. If the second difference value is smaller than a second predetermined value, a synchronization time is obtained according to the second difference value and the update time.

Abstract: The present invention provides a color-mixing light-emitting diode module. According to the present invention, a first light-emitting chip and two second light-emitting chips are disposed on a holder. The first light-emitting chip emits red light and the plurality of second light-emitting chips emit white light. The red light and the white light are mixed, giving mixed light with high color rendering and brightness. Objects illuminated by the mixed light will exhibit colors closest to their original colors as perceived by eyes. Furthermore, by arranging the first and second light-emitting chips in matrix, the color rendering of the light-emitting diode module can be adjusted and improved.

Abstract: The present invention provides a light-emitting module, which comprises a light-emitting device, a light-guiding member, and an external light-guiding member. The light-emitting device emits light. The light-guiding member is disposed on the light-emitting path of the light-emitting module; the external light-guiding member is disposed on the light-emitting path of the light-emitting member. The light-guiding member distributes the light over the light-incidence surface of the external light-guiding member uniformly. After the external light-guiding member, the light is modified to axially symmetric light. Besides, the light-emitting device is disposed in a reflection ring, and a diffuser is disposed on the light-emitting path of the light-emitting device. When a minority of the light-emitting device fail, although the overall energy of the light source is reduced, the influence on the light emission of the light-emitting module is not significant.

Abstract: The present invention provides an LED module capable of blue-light energy, which mainly comprises a blue LED chip and a packaging glue. The blue LED chip emits blue light. The packaging glue covers the light-emitting path of the blue LED chip. The packaging glue further includes a fluorescent powder. The amount of the fluorescent powder occupies 10% to 40% of the amount of the packaging glue. After the blue light excites the fluorescent powder, the white light is generated. The hue of the white light falls in hue coordinates (CIE 1931) and 8 nominal CCT ranges in the chromaticity diagram. The present invention controls the proportion of the fluorescent powder in the packaging glue, so that the blue light consumes most of its energy on exciting the fluorescent powders. Thereby, the proportion of the blue light in the white light is fewer.

Abstract: A time synchronization method is provided. Firstly, an update time of a second playing device is calculated according to a first system time of transmitting a first packet from a first playing device and a second system time of receiving the first packet by the second playing device. Then, a first difference value is calculated according to the first system time of transmitting a second packet from the first playing device and the update time corresponding to the reception of the second packet by the second playing device. If plural first difference values are all smaller than a first predetermined value, a second difference value is calculated. If the second difference value is smaller than a second predetermined value, a synchronization time is obtained according to the second difference value and the update time.

Abstract: The present invention provides a color-mixing light-emitting diode module. According to the present invention, a first light-emitting chip and two second light-emitting chips are disposed on a holder. The first light-emitting chip emits red light and the plurality of second light-emitting chips emit white light. The red light and the white light are mixed, giving mixed light with high color rendering and brightness. Objects illuminated by the mixed light will exhibit colors closest to their original colors as perceived by eyes. Furthermore, by arranging the first and second light-emitting chips in matrix, the color rendering of the light-emitting diode module can be adjusted and improved.

Abstract: A method for synchronizing audio playback includes following steps. Firstly, a first playing device is set as a master playing device. Then, a second operation status of a second playing device is switched to a first operation status of the first playing device. In response to an action command, a first time information of the first playing device is transmitted to the second playing device. By comparing the first time information with a second time information of the second playing device, the second playing device and the first playing device start the audio playback. The first time information and the second time information are continuously compared with each other, and a playback progress of the second playing device is correspondingly adjusted. Consequently, the audio playback of the second playing device and the first playing device are synchronized.

Abstract: An exemplary method for synchronizing audio playback of a plurality of digital media renders. The digital media renders include a digital audio/video (AV) media render and at least one digital audio media render. The method includes: detecting a relative time position difference between the digital AV media render and the at least one digital audio media render; and controlling audio playback of the digital audio media render to synchronize to audio playback of the digital AV media render according to the relative time position difference.

Abstract: A method for synchronizing audio playback of a plurality of digital media renders including a first digital audio media render and at least one second digital audio media render. The method includes: detecting a relative time difference between the first digital audio media render and the at least one second digital audio media render, and controlling audio playback of the at least one second digital audio media render according to the relative time difference, to make audio playback of the at least one second digital media render synchronized with audio playback of the first digital audio media render.