Abstract:
A photoelectric conversion apparatus includes a photoelectric conversion unit, a signal line, a circuit block, and a control circuit. The circuit block includes a differential amplifier circuit including a feedback path, a first switch that controls conduction between an output terminal and the signal line, a second switch that controls conduction between an inverting input terminal and the signal line, and a third switch that controls conduction between the inverting input terminal and the output terminal. The control circuit controls a signal for controlling the first switch and a signal for controlling the third switch to have the relation of logical NOT.
Abstract:
A system for generating clock signals for a photonic quantum computing system includes a first pump photon source, a first photon-pair source optically coupled to the first pump photon source, and a first photodetector optically coupled to the first photon-pair source. The system also includes a first clock generator electrically coupled to the first photodetector, a second pump photon source, a second photon-pair source optically coupled to the second pump photon source, and a second photodetector optically coupled to the second photon-pair source. The system further includes a second clock generator electrically coupled to the second photodetector and a clock mediator coupled to the first clock generator and the second clock generator.
Abstract:
An optical parameter measurement device and a corresponding method are provided. A light beam from a to-be-tested display panel is split by a beam-splitting assembly into at least two testing light beams. A voltage value corresponding to a first testing light beam is measured by a trans-impedance amplification circuit corresponding to a first optical sensor. Next, an integration time period is determined by a control circuit according to voltage values from the trans-impedance amplification circuit and a predetermined relational model between voltage values corresponding to the light intensities and integration time periods. A voltage value corresponding to a second testing light beam is finely measured by the integration circuit corresponding to a second optical sensor within the integration time period. Finally, the display brightness value of the to-be-tested display panel is determined by the control circuit according to a voltage value from the integration circuit within the integration time period.
Abstract:
Disclosed are an ultraviolet measuring device, a photodetector, an ultraviolet detector, an ultraviolet index calculation device, and an electronic device or portable terminal including the same. In one aspect, an ultraviolet measuring is provided to comprise: a substrate on which an electrode is formed; a readout integrated circuit (ROTC) unit electrically connected with the electrode; and an aluminum gallium nitride (AlGaN) based UVB sensor electrically connected with the readout integrated circuit unit and formed on an insulating substrate, wherein the read-out integrated circuit converts a photocurrent input from the UV sensor into a digital signal including UV data.