The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 2000
Filed:
Jun. 24, 1983
Claude E Tew, Dallas, TX (US);
Raytheon Company, Lexington, MA (US);
Abstract
A forward looking infrared (FLIR) device implemented using complementary metal oxide semiconductor (CMOS) techniques is disclosed. The device includes optics (10) for focusing infrared energy onto a scanner (12) for scanning across a detector array 16; a signal conditioning integrated circuit 18 for producing television compatible video signals from the detector array outputs which are electrical signals representative of the infrared energy impinging thereon; and a monitor (2) for displaying the video signals. The detector array and signal conditioning IC are mounted on a metallized ceramic chip affixed within a DEWAR (19). Electronics (20) ancillary to the signal conditioning IC is located outside the DEWAR. The signal conditioning IC includes an array of preamplifiers (24) d-c coupled to the detector array for amplifying the detector array outputs, a-c coupled into band limiters (26) for limiting noise, an array of circuits (28) including d-c restoration circuits for restoring the d-c level to the a-c signals, offset circuits for partially correcting the d-c restored signals for MOSFET losses and a multiplexer. The multiplexer multiplexes the partially corrected signals as video signals to a multiplexer post amplifier 36A. The multiplexer post amplifier output goes to a multiplying digital to analog converter (MDAC) 30. The MDAC completes correcting the video signals for offset, and corrects the gain thereof for post amplification in a post amplifier 36 to provide 525 line video for television display.