William E Ruff

US Patent:

7129465, Oct 31, 2006

Filed:

Apr 13, 2005

Appl. No.:

11/104918

Inventors:

Jorge Andres Garcia - Newark DE, US
Fouad Eskender Kiamilev - Hockessin DE, US
William Beynon Lawler - Edgewater MD, US
William Charles Ruff - Catonsville MD, US
Barry Lee Stann - Edgewater MD, US

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01J 40/14

US Classification:

250214R, 250214 A

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.