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US 6,650,614 B1Granted
Optical disk pickup using current mode signal exchanges and systems and methods using the same
AssigneeCirrus Logic, Inc.
InventorsDavid Michael Pietruszynski, Rex Baird
Life of this patent
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Abstract
An optical disk pickup system includes an array of photodiodes 101 for converting photons reflected from an optical disk into a plurality of electrical signals each representing a channel. Driving circuitry 407, 408 drives at least one of the electrical signals as a current across a conductor of a flexible cable 403. A low impedance load 404 converts the electrical signal driven across the conductor as a current into a voltage for further processing.
Claims5
An optical disk pickup system comprising:
- a photodiode for converting photons reflected from an optical disk into a current;
- a transimpedance amplifier for converting the current from the photodiode into a voltage signal;
- and
- a transconductance amplifier for driving a conductive line of a flexible cable with a current generated from the voltage signal.
1 more element
Dependencies are inferred from the claim text.