Arrangement for contact-free measurement of electrical charge images in electro-radiographic recording methods

US4486778A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Lothar Risch · Neubiberg, DE
• Ingmar Feigt · Langensendelbach, DE
• Reinhard Tielert · Munich, DE

Key dates

• Filing date: May 11, 1982
• Grant date: Dec 4, 1984
• Expiry date: May 11, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G03G15/054
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

In an exemplary embodiment, an electrical charge image is scanned by a matrix of integrated MOS components with a floating gate (or a switched floating gate), functioning as a matrix of potential sensors, to produce an image signal for display on a video screen. A minimum field effect transistor with source-follower circuitry is preferably employed as the potential sensor; the sensor outputs are linked to a shift register. The new component is suitable for employment for potential measurements in X-ray diagnostics.