Title:
【発明の名称】センサ素子および不揮発性記憶手段を備えた回路装置
Document Type and Number:
Japanese Patent JP2002513984
Kind Code:
A
Abstract:
A circuit includes a sensor delivering a charge, a capacitor non-volatilely storing the charge, and a read and reset circuit reading out the stored charge. The capacitor has further connection terminals connected to the read and reset circuit and in parallel with the sensor terminals, and a ferroelectric storage dielectric intermittently connected to the sensor. The sensor can be a photodiode, a phototransistor, a Hall sensor, or a thermoelement. A switch can be connected between one of the further terminals and one of the sensor terminals. Preferably, the switch is a transistor and a drive circuit drives it. The sensor and the capacitor are formed in a semiconductor body. During a storage procedure, time periods during which the switch is on are coordinated with the sensor and/or capacitor to keep an electrical field present between the further terminals below a maximum value at which the ferroelectric dielectric saturates.
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Inventors:
Carlos Masure-Espejo
Christoph Zeller
Christoph Zeller
Application Number:
JP2000547621A
Publication Date:
May 14, 2002
Filing Date:
March 26, 1999
Export Citation:
Assignee:
Infineon Technologies Actien Gezel Shaft
International Classes:
G01D5/18; G11C7/00; G11C11/22; G11C11/34; G11C27/00; G11C27/02; H01L21/8246; G01J1/46; H01L27/105; H01L27/146; H01L27/22; H01L31/00; (IPC1-7): G11C27/02; G01J1/46; G11C11/22; G11C27/00; H01L27/105; H01L27/146; H01L27/22
Attorney, Agent or Firm:
Toshio Yano (4 outside)