Infrared detector circuit having a resistor series connected to the detector to limit the current across the pn junction of the FET

US4906834A · kind A · utility

Assignee

• Heimann GmbH · DE

Inventors

• Reiner Quad · Taunusstein, DE
• Udo Ringelstein · Lorch, DE

Key dates

• Filing date: Oct 12, 1988
• Grant date: Mar 6, 1990
• Expiry date: Oct 12, 2008

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J5/35
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A circuit for an infrared detector includes a field effect transistor and a gate resistor connected thereto. A current-limiting component, preferably an ohmic resistor, is connected in series with the detector element between the gate of the field effect transistor and ground, to limit the current across the pn junction of the field effect transistor.