Abstract: Embodiments provide a method of performing a carrier switch for a device wafer, attaching a second wafer and removing a first wafer. A buffer layer is deposited over the device wafer, buffer layer reducing the topography of the surface of the device wafer. After the carrier switch a film-on-wire layer is removed from the buffer layer and then the buffer layer is at least in part removed.

Abstract: The present invention provides a fractional frequency divider, wherein the fractional frequency divider includes a plurality of registers, a counter, a control signal generator and a clock gating circuit. Regarding the plurality of registers, at least a portion of the registers are set to have values The counter is configured to sequentially generate a plurality of counter values, wherein the plurality of counter values correspond to the at least a portion of the registers, respectively, and the plurality of counter values are generated repeatedly The control signal generator is configured to generate a control signal based on the received counter value and the value of the corresponding register. The clock gating circuit is configured to refer to the control signal to mask or not mask an input clock signal to generate an output clock signal.

Abstract: The invention provides an optical pressure sensor. The light-emitting module emits a detection light, and the light-receiving module receives a reflected light reflected by an object. When the distance between the object and the light-receiving module changes due to external pressure, the intensity of reflected light changes. The control module compares the intensity difference of the signal to determines the pressing state.

Abstract: The present invention provides an optical sensor package assembly. The light shield is arranged in the groove of a package housing above the photosensitive chip. The connection wires between the substrate, the light emitting unit and the photosensitive chip can be printed or disposed on the surface of the substrate. Further, a distance between the photosensitive element and the chip edge is designed to reduce or avoid side leakage interference.

Abstract: The present invention proposes a chip reliability test assembly, which comprises a motherboard and a daughter board. The motherboard is used to support the chips during an aging acceleration process at high temperature. The daughter board is used to measure the electricity of chip after the aging acceleration process. Each chip holder is removable off the motherboard. The daughter board does not go through the aging acceleration process and can be reusable.

Abstract: The present invention provides a light sensor with dark current elimination. A dark current from a covered photodiode and a sensed current from a photodiode are respectively transformed to a dark voltage and a sensed voltage by a controlled integration circuit. A reverse capacitor receives the dark voltage and the sensed voltage to cancel out for each other, and outputs a corrected sensing voltage.

Abstract: The present invention provides an adaptive proximity sensing device, which can adjust the lighting power of a light-emitting element according to the sensed intensity to extends the sensing range. Further, the device can normalize the final sensed intensity to return the normal sensed intensity. Moreover, the uses a linear model of the normal sensed intensity and the distance, so the device can quickly determine the distance of the object.

Abstract: This invention provides an earphone with a low light transmittance and a non-porous sensor cover. Covering the sensing cover on the proximity sensing device can reduce the interference of most of the ambient light and improve measurement accuracy.

Abstract: This invention provides an earphone with a low light transmittance and a non-porous sensor cover. Covering the sensing cover on the proximity sensing device can reduce the interference of most of the ambient light and improve measurement accuracy.

Abstract: The heart rate and blood oxygen monitoring device of the present invention utilizes two ambient light calibration DACs, which can quickly calibrate noise signals generated by ambient light. The heart rate and blood oxygen monitoring device can provide more accurate heart rate and blood oxygen values for optical measurement methods.

Abstract: The present invention provides a proximity sensing device with linear electrical offset calibration, which can record electrical offsets caused by different dark currents under different settings of the pulse count or the pulse time, and the proximity sensing device uses these electrical offsets to obtain the linear electrical offset ratio. Then calculate and infer the electrical offset generated in actual use through the linear electrical offset ratio to calibrate sensing signal.

Abstract: The present invention proposes a packaging structure that integrates distance sensing device and temperature sensing device, and it is applied to small wearable devices such as earphones or watches. The combination of distance and temperature sensing allows the wearable device to accurately determine whether it is on the user's body, and then start temperature monitoring. It can collect ear temperature information more effectively and energy-saving.

Abstract: Disclosures of the present invention describe an optical proximity sensor, which is particularly designed to have functionality of canceling an ambient light noise and/or an optical crosstalk noise by using light-to-frequency conversion technique, and comprises: a controlling and processing circuit, a lighting unit, a light receiving unit, an analog adder, a first DAC unit, a second DAC unit, and a light-to-digital conversion (LDC) unit. In the controlling of the controlling and processing circuit, the first DAC unit and the second DAC unit would respectively generate a first compensation current signal and a second compensation current signal to the analog adder, such that a noise signal of ambient light and a noise signal of optical crosstalk existing in an optical current signal of object reflection light would be canceled by the two compensation current signals in the analog adder.

Abstract: The present invention provides a photosensor device with temperature compensation, which can adjust or calibrate the number, time and power of luminescence of light emitting elements under different ambient temperatures, so that the light signal values received by the photosensor device can be kept consistent or within the error range, there are multiple applications.

Abstract: A low power operation method provides an apparatus with a data transmission rate. A power management unit (PMU), which is not influenced by voltage, process, and temperature, biases a high frequency oscillator (HOSC) and makes the HOSC generate a steady and high precision clock. The clock of the HOSC is used to modify a timing length of a timer which is referenced by a low frequency oscillator (LOSC) without PMU. At last, through the modified timing length, the apparatus achieves high precision periods and data transmissions with compensation for voltage, process, and temperature. Thus, the data transmission cycles of the apparatus maintain stable and robust even if the apparatus applies duty cycle usage of the HOSC and the PMU for reducing power consumption with actions of turning on and turning off. Consequently, the periodic apparatus maintains data transmission rate with the low power consumption advantage of non-periodic apparatus.

Abstract: A low power operation method provides an apparatus with a data transmission rate. A power management unit (PMU), which is not influenced by voltage, process, and temperature, biases a high frequency oscillator (HOSC) and makes the HOSC generate a steady and high precision clock. The clock of the HOSC is used to modify a timing length of a timer which is referenced by a low frequency oscillator (LOSC) without PMU. At last, through the modified timing length, the apparatus achieves high precision periods and data transmissions with compensation for voltage, process, and temperature. Thus, the data transmission cycles of the apparatus maintain stable and robust even if the apparatus applies duty cycle usage of the HOSC and the PMU for reducing power consumption with actions of turning on and turning off. Consequently, the periodic apparatus maintains data transmission rate with the low power consumption advantage of non-periodic apparatus.

Abstract: A digital device is provided. The digital device uses three states, including a ground (GND) state, a voltage (VDD) state, and a FLOAT state. On designing a chip, two storage units and a pad circuit are set inside; the pad circuit comprises a current limiter and two switches; and less ports contained are required than the conventional. That is, one port obtains three states. As comparing to the conventional having only two states, the present invention uses the port connected with two storage units in the pad circuit for obtaining the three states; a circuit featuring “pull up” and “pull down” is used to identify the state of connection of the port; and the port determines a plurality of definitions through the three states of GND, VDD and FLOAT. Thus, a pad is saved for reducing the space and cost of the chip.

Abstract: A smart method is provided for a low-current oscillatory circuitry. The circuitry comprises an oscillator and a microcontroller unit (MCU). The oscillator comprises a proportional-to-absolute-temperature circuit connecting to a low-voltage regulator. The low-voltage regulator connects to a PMOS diode array and a delay unit circuit. The PMOS diode array connects to the MCU. The delay unit circuit connects to the MCU and a voltage converter. The method includes a normal temperature compensation algorithm; a smart learning algorithm of extra-high temperature compensation; and an ultra-high temperature compensation algorithm. Thus, clock variations are compensated; output frequency is stable and not affected by voltage or temperature variations; and process variations are suppressed. When process variations appear, there are not be too many errors generated.

Abstract: A light sensor device is provided. It is controlled with a dual-mode master-and-slave microcontroller unit (MCU) application. An MCU is embedded into a light sensor chip. The original dual-mode master-and-slave dual-CPU architectures are combined to be operated as a single-CPU architecture. Since the original circuit pin design is followed, it is possible to be compatible with the old circuit design. The present invention uses a single-CPU architecture to directly control light sensors. Through the configuration of RAM, an inter-integrated circuit bus (I2C I/F) can be redirected to an internal non-volatile memory to switch the operational mode of the light sensor chip from a slave machine to a host machine which switches off the interrupt pin and, then, turns to a GPIO pin. Thus, the present invention provides a simple single-CPU architecture with easy use and effectively-lowered cost.

Abstract: Disclosures of the present invention describe an optical proximity sensor, which is particularly designed to have functionality of canceling an ambient light noise and/or an optical crosstalk noise by using light-to-frequency conversion technique, and comprises: a controlling and processing circuit, a lighting unit, a light receiving unit, an analog adder, a first DAC unit, a second DAC unit, and a light-to-digital conversion (LDC) unit. In the controlling of the controlling and processing circuit, the first DAC unit and the second DAC unit would respectively generate a first compensation current signal and a second compensation current signal to the analog adder, such that a noise signal of ambient light and a noise signal of optical crosstalk existing in an optical current signal of object reflection light would be canceled by the two compensation current signals in the analog adder.