Patent ID: 8552375
Filing Date: 2013-10-08
Classification: G01J,H04N

Abstract:
1. An image detector system comprising: a plurality of image detectors configured to form an image detector array; a switched capacitor filter configured to receive a reference signal and provide a sampled and filtered reference signal for one or more of the image detectors, wherein the switched capacitor filter comprises: a third switch, coupled between the first switch and the first terminal of the second capacitor, configured to provide a direct path to bypass the switched capacitor filter and receive the reference signal and provide the reference signal as the sampled and filtered reference signal to the one or more image detectors; a fourth switch, coupled between the third switch and the first terminal of the second capacitor, configured to pre-charge the second capacitor with the reference signal if the third switch and the fourth switch are closed; and a logic device configured to control the first through fourth switches such that the first capacitor samples the reference signal, the first and second capacitors share charge, the second capacitor provides the sampled and filtered reference signal if the third switch is not controlled to bypass the switched capacitor filter, and the third and fourth switches are controlled to close if the second capacitor is to be pre-charged.