| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a CCD signal processing channel with input and output offset correction. <P>SOLUTION: A variable gain amplifier circuit includes: a correlated double sampling circuit 1202 for removing an unwanted correlated noise component from an input signal; a first programmable gain amplifier 104 positioned downstream of the correlated double sampling circuit; a first offset correction circuit 500 having an input connected to an input of the first programmable gain amplifier and an output connected to an input of the correlated double sampling circuit to provide a first offset correction for at least either of an offset of the input signal and an offset of the correlated double sampling circuit; an analog/digital converter 106 positioned downstream of the first programmable gain amplifier; a second offset correction circuit 502 positioned downstream of the first programmable gain amplifier to provide a second offset correction; and a pixel gain amplifier 1204 positioned downstream of the correlated double sampling circuit and upstream of the first programmable gain amplifier. <P>COPYRIGHT: (C)2013,JPO&INPIT |
