PIXEL CIRCUIT, SEMICONDUCTOR PHOTODETECTOR AND RADIATION COUNTER

• Main Author: NISHIHARA TOSHIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 01.02.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEMICONDUCTOR DEVICES

PROBLEM TO BE SOLVED: To provide a pixel circuit capable of reliably detecting weak light.SOLUTION: An amplifier section amplifies an input voltage with a gain higher than a predetermined value in a predetermined region which carries a balanced voltage in which an input voltage on the input terminal is balanced with an output voltage on the output terminal. A photoelectric conversion part converts the light into an electrical charge. An electrical charge storage part accumulates the electrical charge and supplies the voltage corresponding to the accumulated electrical charged amount to the input terminal. Receiving an instruction of initialization of the input voltage, a voltage initialization section short-circuits between the input terminal and the output terminal to initialize the input voltage to the balanced voltage.SELECTED DRAWING: Figure 2 【課題】微弱な光を確実に検出する。【解決手段】増幅部は、入力端子の入力電圧と出力端子の出力電圧とが均衡する均衡電圧を含む所定の領域内において所定値より高いゲインで前記入力電圧を増幅する。光電変換部が、光を電荷に変換する。電荷蓄積部が、前記電荷を蓄積して当該蓄積した電荷の量に応じた電圧を前記入力端子に供給する。電圧初期化部が、前記入力電圧の初期化が指示されると前記入力端子と前記出力端子との間の短絡により前記入力電圧を前記均衡電圧に初期化する。【選択図】図２