Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1985-09-05
1987-11-10
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250342, G01J 532
Patent
active
047059460
ABSTRACT:
An improved infrared sensor is provided which is of the type which scans across a spatial region and detects infrared energy radiating from a celestial body and in which an input electronic signal is produced in response to the detected infrared energy, wherein the improvement comprises: amplifier circuit means for providing an amplified output signal in response to the input electronic signal; threshold detection circuit means for detecting when the output electronic signal reaches a prescribed threshold level substantially below a saturation level of said amplifier circuit means said threshold detection circuit means comprising a thresholding circuit for providing a turn-on signal when the output signal reaches the prescribed threshold level; and feedback circuit means for providing a feedback signal for limiting the input electronic signal provided to said amplifier circuit means, said feedback circuit means comprising a feedback amplifier circuit responsive to the turn-on signal, such that the feedback signal is provided when the output signal substantially reaches the prescribed threshold level; wherein a feedback loop comprising said threshold detection circuit means and said feedback circuit means is characterized by a feedback ratio selected to substantially dampen unwanted oscillations in said feedback loop.
REFERENCES:
patent: 3225304 (1965-12-01), Richards
patent: 3550028 (1970-12-01), Dilley et al.
patent: 3569719 (1971-03-01), Dryden
patent: 3770984 (1973-11-01), Connor et al.
patent: 3920994 (1975-11-01), Cargille
patent: 3999060 (1976-12-01), Skagerlund
patent: 3999084 (1976-12-01), Beaudette
patent: 4095126 (1978-06-01), Hoffman et al.
patent: 4138612 (1979-02-01), Schlesinger
patent: 4533863 (1985-08-01), Luhn et al.
patent: 4542350 (1985-09-01), Akazawa et al.
Hannaher Constantine
Howell Janice A.
Hughes Aircraft Company
Karambelas A. W.
Meltzer M. J.
LandOfFree
Infrared sensor comprising improved feedback limited amplifier a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Infrared sensor comprising improved feedback limited amplifier a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared sensor comprising improved feedback limited amplifier a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1069512