FT17N / FT17P
Sensor image
2/3 inch dual aspect ratio image sensor
Description
The FT17N is a NTSC/EIA-compatible image sensor which is provided with a 12-phase
vertical transport clock structure in the image section.
The FT17P image sensor is a PAL/CCIR vesion of Philips Semiconductors鈥?dual aspect ratio
image sensor, which is provided with a 12-phase vertical transport clock structure in the
image section.
By selecting the appropriate phase type of the vertical image clock pulses it is possible to put
the image sensor in the required aspect ratio mode. In the 4:3 aspect ratio mode a virtual 4-
phase mode is applied and in the 16:9 mode a virtual 3-phase mode is applied.
Offering the advantage of optimizing the performance of a switchable camera in both 4:3 and
16:9 aspect ratio modes, the frame transfer technology supports the same number of active
lines and active pixels in both modes. The image diagonals of these formats are within the
tolerances of the required optical devices, making it is possible to use the same camera lenses
for both aspect ratio modes. Now the camera manufacturer can construct a switchable camera
in which the selected aspect ratio mode is purely determined by the electronic circuitry's.
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