Title:
OPTICAL RECEPTION CIRCUIT
Document Type and Number:
Japanese Patent JP3148557
Kind Code:
B2
Abstract:
PURPOSE: To sharpen the rise and fall waveforms of a regenerative signal due to a light receiving element by connecting operational amplifiers with gain limit feedback paths at both terminals of the light receiving element consisting of the optical reception circuit.
CONSTITUTION: A light receiving element 1 is provided, both terminals of the light receiving element 1 are connected between the input terminals of operational amplifiers 2 having the gain limit feedback paths composed of transistors 22, and a comparator 3 is connected to the output of the operational amplifiers 2. When connecting the operational amplifiers 2 with gain limit feedback paths to the light receiving element 1, a light receive signal can be reproduced with fidelity even when there is dispersion in the characteristics of the light receiving element 1. As a result, the regenerative signal sharpening the rise and fall waveforms can be provided and optical communication can be performed even in serial communication utilizing RS232C, for example.
Inventors:
Koji Maeda
Application Number:
JP7897895A
Publication Date:
March 19, 2001
Filing Date:
April 04, 1995
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
Tottori Sanyo Electric Co.,Ltd.
Tottori Sanyo Electric Co.,Ltd.
International Classes:
H04B10/40; H03G3/20; H04B10/07; H04B10/114; H04B10/50; H04B10/60; H04B10/67; H04B10/69; H04Q9/00; (IPC1-7): H04B10/28; H03G3/20; H04B10/04
Domestic Patent References:
| JP629802A | ||||
| JP6196973A | ||||
| JP1113689A | ||||
| JP61198904A | ||||
| JP63246942A | ||||
| JP57111119A | ||||
| JP5842008A | ||||
| JP5949528B2 | ||||
| JP5339157Y2 |
Attorney, Agent or Firm:
Takashi Okada