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US 6,747,700 B1Granted
Solid state image pickup apparatus having a plurality of split buses
AssigneeFujitsu Limited
InventorsJun Funakoshi, Chikara Tsuchiya
Life of this patent
Estimating the term…
Abstract
In a solid state image pickup apparatus, a read bus consists of, for instance, four lines of split buses and one line of integrated bus. This integrated bus can be connected to the four lines of split buses. Electrical connection between the integrated bus and each of the split buses is selected by a corresponding switching element. Thus, the number of switching elements connected to one split bus can be reduced and hence the capacitance of the split bus can be reduced. This allows pixel signals to be read out at a higher speed.
Claims3
A solid state image pickup apparatus comprising:
- a plurality of pixels which are arranged in at least one rows and grouped into a plurality of groups;
- a horizontal scanning circuit which reads a pixel signal from said pixels;
- a plurality of horizontal selection lines, each of the horizontal selection lines connected to the pixel in each of the rows for outputting the pixel signal;
- a plurality of split buses selectively connected to each of the horizontal selection lines;
- a plurality of selecting switches, each of the selecting switches connected to each of the horizontal selection lines for selecting one of the split buses based on a selection signal output from the horizontal scanning circuit for outputting the pixel signal to selected one of the split buses;
- an integrated bus selectively connected to each of said split buses;
- and
- switching elements connected between the split buses and the integrated bus for validating the electrical connection between each of said split buses and said integrated bus only to any one of the split buses, or for invalidating the connection to all of the split buses.
5 more elements
Dependencies are inferred from the claim text.