Architecture and Operation
The basic architecture of the sensor is shown in Figure 1.
Figure 1. Block Diagram of the IBIS4-14000 Image Sensor
4560 x 3048 active pixels
3048 column amplifiers
The Y shift registers point at a row of the imager array. This
second one points at the row to be reset. The second pointer
may lead the first pointer by a specific number of rows. In that
case, the time difference between both pointers is the
integration time. Alternatively, both shift registers can point at
the same row for reset and readout for a faster reset
sequence. When the row is read out, it is also reset in order to
do double sampling for fixed pattern noise reduction.
The pixel array of the IBIS4-14000 consists of 4536 x 3024
active pixels and 24 additional columns and rows, which can
also be addressed (see Figure 2 on page 3). The column
amplifiers read out the pixel information and perform the
double sampling operation. They also multiplex the signals on
the readout buses, which are buffered by the output amplifiers.
The shift registers can be configured for various subsampling
modes. The output amplifiers can be individually powered
down. And some other extra functions are foreseen. These
options are configurable via a serial input port.
Document #: 38-05709 Rev. *B
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