Abstract:
The present invention relates to an operational amplifier having low power consumption, which comprises a differential circuit, an output-stage circuit, and a floating bias generating circuit. The differential circuit receives an input signal and produces a control signal. The output-stage circuit is coupled to the differential circuit and produces an output signal according to the control signal. The floating bias generating circuit is coupled between the differential circuit and the output-stage circuit and generates a floating bias according to the control signal for controlling the rising or lowering of the voltage level of the output signal. Accordingly, the operational amplifier can charge and discharge rapidly, and thus extending the applications of the operational amplifier. Besides, the floating bias generating circuit can limit the output current while the operational amplifier is driving, and thus achieving the purpose of low power consumption.
Abstract:
The present invention relates to an oscillating device, which comprises a driving module and an oscillating module. The driving module is used for producing a first driving voltage and a second driving voltage. The oscillating module comprises a first symmetric load circuit, a second symmetric load circuit, and a bias circuit. The first symmetric load circuit and the second symmetric load circuit produce a bias according to the first driving voltage. The bias circuit produces a bias current according to the second driving voltage. The oscillating module produces an oscillating signal according to the first driving voltage and the bias current, where the bias current is proportional to the bias. Thereby, by making the driving signal produced by driving module proportional to the bias of the oscillating module, simple compensation for temperature and process can be performed. Thereby, the frequency can be tuned using a few calibration bits.
Abstract:
The present invention relates to a decoding and scan driver, which comprises a level-shift circuit, a decoding circuit, an output driving circuit, and a control circuit. The level-shift circuit receives a plurality of input signals and shifts the voltage levels of the plurality of input signals for producing a plurality of decoding control signals. The decoding circuit is coupled to the level-shift circuit and produces a plurality of decoding signals according to the plurality of decoding control signals. The output driving circuit is coupled to the decoding circuit, produces a driving signal sequentially according to the plurality of decoding signals, and outputs the driving signal for driving a display panel. The control circuit is coupled to the output driving circuit, produces a control signal according to one of the plurality of input signals, and transmits the control signal to the output driving circuit for controlling the output driving circuit to output the driving signal. Thereby, the circuit area of the decoding and scan driver is saved and the cost is thus reduced.
Abstract:
The present invention relates to a proximity sensing method for proximity sensing unit in a mobile device. The proximity sensing method comprises steps of comparing a sensed value of the proximity sensing unit with a predetermined offset value or a first predetermined range to determine if the sensed value is smaller than the predetermined offset value or if the sensed value is within the first predetermined range; and providing an offset value for confirming if an object is near the mobile device according to the determination that if the sensed value is smaller than the predetermined offset value or within the first predetermined range.
Abstract:
The present invention relates to a driving circuit of display panel capable of eliminating flash, which comprises a scan driving circuit and a data driving circuit. The scan driving circuit produces a plurality of scan signals for scanning a plurality of pixel structures of the display panel. The data driving circuit produces a plurality of data signals for transmitting the plurality of data signals to the plurality of pixel structures when the plurality of pixel structures are scanned. When the data driving circuit transmits the plurality of data signals to the plurality of pixel structures, the data driving circuit adjusts the voltage levels of the data signals of the plurality of pixel structures to be symmetrical to a common voltage of the plurality of pixel structures.
Abstract:
The present invention provides a driving circuit for display panel, which comprises a power supply circuit and a driving unit. The power supply circuit outputs a driving power supply voltage. The driving unit produces a driving signal according to a data signal and the driving power supply voltage for driving the display panel. In addition, the voltage level of the driving power supply voltage increases to a predetermined level. Thereby, during the process of charging the display panel by the data driving circuit, the driving power supply voltage output by the power supply circuit increases from a low level to a predetermined level for reducing the power consumption of the driving circuit.
Abstract:
The present invention provides an analog-to-digital converter, which comprises an integration circuit, a threshold signal generating circuit, a main comparison circuit, a sub comparison circuit, a counter, and a decoder. The integration circuit integrates an input signal and produces an integration signal. The threshold signal generating circuit generates a main threshold signal and a plurality of sub threshold signals. The main comparison circuit produces a plurality of main comparison signals according the integration signal and the main threshold signal. The sub comparison circuit produces a plurality of sub comparison signals according to the integration signal and the plurality of sub threshold signals. The counter counts the plurality of main comparison signals and produces a first counting signal. The decoder decodes the plurality of sub comparison signals and produces a second count signal. The first count signal and the second count signal are used for producing a digital signal.
Abstract:
The present invention relates to an oscillating device, which comprises a driving module and an oscillating module. The driving module is used for producing a first driving voltage and a second driving voltage. The oscillating module comprises a first symmetric load circuit, a second symmetric load circuit, and a bias circuit. The first symmetric load circuit and the second symmetric load circuit produce a bias according to the first driving voltage. The bias circuit produces a bias current according to the second driving voltage. The oscillating module produces an oscillating signal according to the first driving voltage and the bias current, where the bias current is proportional to the bias. Thereby, by making the driving signal produced by driving module proportional to the bias of the oscillating module, simple compensation for temperature and process can be performed. Thereby, the frequency can be tuned using a few calibration bits.
Abstract:
The present application discloses a bump structure and a manufacturing method thereof. The bump structure comprises a first bump layer disposed on a chip and a second bump layer disposed on the first bump layer, and the hardness of the first and second bump layers are different, and both materials of the first and second bump layers are the same conductive material. Thus, when the chip is connected with a substrate through the bump structure and a force applied to the bump structure, it is not easily to cause that the bump structure makes a damage on the chip, and the bump structure according to the present invention is to enhance the structure characteristic and prevented from damaging.
Abstract:
The present application discloses a driving architecture for display panel, which comprises a plurality of drivers and a plurality of driving groups. Each driver includes an enable input terminal and is coupled to at least one display element of a display panel. The driving groups are disposed on the display panel and mutually coupled in series. Each driving group includes the drivers, the enable input terminals of the drivers of at least one driving group are mutually coupled for mutually transmitting an enable signal, and the enable signal is configured to drive the drivers. The driving architecture according to the present application is applied to the display panel, the number of signal lines may be reduced effectively, the normal operation of the display panel may be maintained, and the usage lifetime of the display panel may be extended.