Title:
CONTROL CIRCUIT
Document Type and Number:
WIPO Patent Application WO/1986/006189
Kind Code:
A1
Abstract:
A control circuit comprises AGC circuits (2, 3) that receive x-input signal, and a gain control amplifier (1) that receives z-input signal. Gain of the gain control amplifier (1) is controlled by a gain control voltage (7) produced by the AGC circuits (2, 3), in order to carry out the division operation z/x, and to obtain a division output signal from an output terminal (5) of the gain control amplifier (1). The control circuit can be used for correcting forcus errors, tracking errors, or the like in the apparatus for optically recording and reproducing data using light such as laser beam.
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Inventors:
YOSHIDA TOSHIFUMI (JP)
NABAE MITSUO (JP)
NISHINAKA YASUO (JP)
MORIYA MITSURO (JP)
NABAE MITSUO (JP)
NISHINAKA YASUO (JP)
MORIYA MITSURO (JP)
Application Number:
PCT/JP1986/000172
Publication Date:
October 23, 1986
Filing Date:
April 08, 1986
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
International Classes:
G06G7/163; G11B7/09; (IPC1-7): G06G7/16
Other References:
No relevant documents have been disclosed.
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