Method and system for operating an image data collection device

摘要

In accordance with an exemplary embodiment of the present invention, a method is provided to form an image using an active pixel sensor imager (108). The method includes placing an active pixel sensor (202) in electrical contact with a column readout line (204), lacing a sample-and-hold capacitor into electrical contact with the column readout line, and placing the sample-and-hold capacitor (314 or 320) in electrical contact with an input capacitor (324 or 334) on an amplifier (222). All of the input capacitor (324 or 334), the sample-and-hold capacitor (314 or 320), and the active pixel sensor (202) are in electrical contact for an overlapping period of time. A differential output (228) from the amplifier (222) is digitized, and used to form an image.

主权项

1. A method of forming an image using an active pixel sensor imager, comprising:
placing an active pixel sensor in electrical contact with a column readout line; placing a sample-and-hold capacitor into electrical contact with the column readout line; placing the sample-and-hold capacitor in electrical contact with an input capacitor coupled between the sample-and-hold capacitor and an amplifier, wherein the input capacitor, the sample-and- hold capacitor, and the active pixel sensor are all in electrical contact for an overlapping period of time, and wherein the active pixel sensor charges the sample-and-hold capacitor and the input capacitor during the overlapping period of time; disconnecting the sample-and-hold capacitor from the amplifier; digitizing a differential output from the amplifier; and forming an image from the digitized output.