| 摘要 |
Infrared sensor (14) of the type which scans across a spatial region and detects infrared energy radiating from a celestial body comprising an amplifier circuit means (18, 20) for providing an amplified output signal in response to the infrared sensor signal (12); threshold detection circuit (22) means for detecting when the output electronic signal (16) reaches a prescribed threshold level substantially below a saturation level of said amplifier circuit means (28, 20) and feedback circuit means (22, 24) for providing a feedback signal for limiting the sensor signal (12) provided to said amplifier circuit means (18, 20), said feedback circuit means (22, 24) comprising a feedback amplifier circuit (22) responsive to the thresholded output signal (16) wherein the feedback loop is characterized by a feedback ratio selected to substantially dampen unwanted oscillations. |
