Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2006-10-31
2006-10-31
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S2140AG
Reexamination Certificate
active
07129465
ABSTRACT:
Methods and apparatus for generating a code-multiplexed readout value of photocurrents for a photo-detector array of cells are disclosed. Readout values are determined using a multiplexer and current amplifier for each cell and a current-to-voltage converter for each row of cells. The multiplexer multiplexes a photocurrent in an electrical domain for a respective cell using a code and generates electric currents responsive to the photocurrent. The current amplifier amplifies the electric currents. The current-to-voltage converter for each row generates the readout value for that row of the array responsive to the amplified electric currents.
REFERENCES:
patent: 4890070 (1989-12-01), Benahim et al.
patent: 4953155 (1990-08-01), Tangonan et al.
Garcia Jorge Andres
Kiamilev Fouad Eskender
Lawler William Beynon
Ruff William Charles
Stann Barry Lee
Bloor Stephen
Miller Guy M.
Pyo Kevin
The United States of America as represented by the Secretary of
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