Optical pickup and high-frequency superposition module therefor

Details Optical pickup and high-frequency superposition module therefor Optical pickup and high-frequency superposition module therefor

2005-07-05

2005-07-05

Huber, Paul W. (Department: 2653)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

Reexamination Certificate

active

06914872

ABSTRACT:
A high-frequency superposition module for an optical pickup that reduces the number of devices, facilitates scale-down and allows an oscillating circuit to be turned off when a power supply for feeding a direct current to a laser diode is turned off and an optical pickup using the high-frequency superposition module. An oscillating circuit for feeding a high frequency to a laser diode comprises at least an active element and passive elements such as capacitors, resistors, and inductors. A power supply for feeding a direct current to the laser diode is also used as a power supply for the oscillating circuit.

REFERENCES:
patent: 5086420 (1992-02-01), Doi
patent: 5566142 (1996-10-01), Nakano et al.
patent: 6385219 (2002-05-01), Sonoda
patent: 59-9086 (1984-02-01), None
patent: 7-93758 (1995-04-01), None

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