HIGH-SPEED LIGHT SENSING APPARATUS III

• Main Authors: Chen, Shu-Lu, Chen, Chien-Lung, Liu, Han-Din, Lyu, Yuan-Fu, Lin, Chieh-Ting, Chen, Bo-Jiun, Chu, Shu-Wei, Lin, Chung-Chih, Liang, Che-Fu, Chen, Hui-Wen, Chu, Kuan-Chen, Cheng, Szu-Lin, Na, Yun-Chung
• Format: Patent
• Language: English
• Published: 06.07.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; BASIC ELECTRIC ELEMENTS; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; SEMICONDUCTOR DEVICES; TESTING

A circuit, including: a photodetector including a first readout terminal and a second readout terminal different than the first readout terminal; a first readout circuit coupled with the first readout terminal and configured to output a first readout voltage; a second readout circuit coupled with the second readout terminal and configured to output a second readout voltage; and a common-mode analog-to-digital converter (ADC) including: a first input terminal coupled with a first voltage source; a second input terminal coupled with a common-mode generator, the common-mode generator configured to receive the first readout voltage and the second readout voltage, and to generate a common-mode voltage between the first and second readout voltages; and a first output terminal configured to output a first output signal corresponding to a magnitude of a current generated by the photodetector.