Monolithically integrated circuit for linear image scanning with matchable sensors

US4334239A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Heiner Herbst · Haar, DE
• Matthias Niemeyer · Hannover, DE

Key dates

• Filing date: Jul 24, 1980
• Grant date: Jun 8, 1982
• Expiry date: Jul 24, 2000

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K39/32

Abstract

A color image scanning circuit has a linear image sensor with photodiode sensor elements disposed in two adjacent rows integrated on a semiconductor substrate. The sensor elements are divided into groups with all sensors in each group being covered with one of several different color filters. An overflow gate is provided on the substrate between the rows of sensor elements for each group of sensor elements and are provided with individually variable clock pulse voltages for selectively varying the integration time of each group of sensor elements. By selective dimensioning of the respective integration times, compensation of the varying spectral light-sensitivities of the sensor elements can be accurately and simply achieved for generating balanced output signals for each sensor element group.