Patents by Inventor Riku SHIMADA

Riku SHIMADA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • SIGNAL PROCESSING CIRCUIT, AND LIGHT DETECTING DEVICE
    Publication number: 20250116551
    Abstract: In a signal processing circuit, an input terminal is configured to receive an analog signal output from an avalanche photodiode operating in Geiger mode. A comparison circuit outputs a signal based on a component exceeding a threshold among components a signal input to the comparison circuit. The adjustment circuit includes an AC coupling unit, a level shifter unit, and a reference value adjustment unit. The AC coupling unit establishes AC coupling between the input terminal and the comparison circuit. The level shifter unit adjusts the voltage of the signal input to the comparison circuit to a value lower than a reverse bias voltage applied to the avalanche photodiode. The reference value adjustment unit adjusts the reference value of the signal input to the comparison circuit.
    Type: Application
    Filed: January 27, 2023
    Publication date: April 10, 2025
    Applicant: HAMAMATSU PHOTONICS K.K.
    Inventors: Riku SHIMADA, Takuya FUJITA, Takashi BABA, Shunsuke ADACHI, Shinya IWASHINA