Pointing device having improved automatic gain control and...

Details Pointing device having improved automatic gain control and... Pointing device having improved automatic gain control and...

G - Physics

09

G

G09G 5/00 (2006.01) G06F 3/033 (2006.01) H04B 10/152 (2006.01)

Patent

CA 2136191

ABSTRACT OF THE DISCLOSURE An improved optical pointing device utilizing a moveable unit having a voltage-to-frequency converter. The VFC emits pulses with separation proportional to the angular rotative and/or translational position of the moveable unit which pulses are applied to an LED of the moveable unit. A microcomputer in a base unit measures separation of the pulses received by a photodetector to determine the components of the angular rotative and/or translational position of the moveable unit. In accordance with another aspect, automatic gain control circuitry is located in the moveable unit, thereby eliminating the need for two-way communication to achieve consistency of operation in a prescribed space.

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