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US 6,784,930 B1Granted
Active pixel sensor with enhanced reset
AssigneeAgilent Technologies, Inc.
InventorRay A. Mentzer
Life of this patent
Estimating the term…
Abstract
An active pixel sensor arrangement that provides sub-sampling and reset of all pixel cells after sub-sampling. In one embodiment, logic is provided between sampled and non-sampled rows to propagate reset signals to the non-sampled rows when the sampled rows are reset. In another embodiment, reset of non-sampled rows is implemented with control logic.
Claims7
An active pixel sensor circuit, comprising:
- a plurality of pixel cells arranged in a plurality of rows having at least a first portion including at least a first distinct grouping of rows, and a second portion including at least a second distinct grouping of rows, the second portion being distinct from the first portion;
- sampling logic that reads said first portion during a sub-sampling mode of operation;
- and
- reset logic that resets both said first portion and said second portion after a read of said first portion during sub-sampling mode, wherein said reset logic includes supplemental reset logic between at least a first row of said first grouping and a second row of said second grouping, said supplemental reset logic propagating, during sub-sampling mode, a reset signal to said second row in response to receipt of a reset signal for said first row.
1 more element
An active pixel sensor circuit, comprising:
- a plurality of pixel cells arranged in a plurality of rows, each row having a corresponding row select and reset line, and said plurality of rows including at least row N and row N+X, where N and X are integers;
- and
- reset propagation logic coupled between the reset line of row N and the reset line of row N+X that propagates a reset signal on the reset line of row N+X in response to receipt of a reset signal on the reset line of row N, wherein said reset propagation logic includes logic responsive to a sub-sampling mode signal that functions in such a manner as to enable said reset propagation logic when a sub-sampling mode signal is present.
Dependencies are inferred from the claim text.