PHOTODETECTION SIGNAL DETECTING CIRCUIT AND PHOTODETECTION SIGNAL PROCESSOR

Title:

PHOTODETECTION SIGNAL DETECTING CIRCUIT AND PHOTODETECTION SIGNAL PROCESSOR

Document Type and Number:

Japanese Patent JPH0815584

Kind Code:

A

Abstract:

PURPOSE: To most adequately control the gains of first and second variable amplifier circuits according to alarm setting voltages of a received signal detecting circuit and received signal processor.

CONSTITUTION: The gains of the first and second variable amplifier circuits (21A, 21B) are controlled according to the alarm setting voltages. As a result, the optimum gains are settable for the respective alarm setting levels and, therefore, noise resistance is improved at a wide range of the alarm setting levels. In addition, the free setting of the alarm setting levels is possible.

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Inventors:

MURAKAMI DAISUKE
MOGI TAKAYUKI
MATSUMOTO ISAO
UCHIYAMA JUNKO

Application Number:

JP17165994A

Publication Date:

January 19, 1996

Filing Date:

June 30, 1994

Export Citation:

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Assignee:

SONY CORP

International Classes:

G02B6/42; H03G3/00; H04B10/07; H04B10/112; (IPC1-7): G02B6/42; H03G3/00

Attorney, Agent or Firm:

Kei Tanabe

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