Title:
CURRENT/VOLTAGE CONVERTING DEVICE AND LIGHT RECEIVING AMPLIFYING DEVICE HAVING THE SAME DEVICE
Document Type and Number:
Japanese Patent JP3585772
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a current/voltage converting device such that the lowering of a gain in a signal with high frequencies can be prevented for coping with the high speed processing of a circuit, and a light receiving amplifying device using this current/voltage converting device.
SOLUTION: A light receiving amplifying device 1 is provided with a current/ voltage converting circuit 2 which converts a current signal generated when a photodiode PD receives a laser beam into a voltage signal, a reference circuit 3 having the similar circuitry as that of the current/voltage converting circuit 2, and a differential amplifier circuit 4 having a positive phase input terminal (a) to which the voltage signal of the current/voltage converting circuit 2 is applied through a resistance R3 and an anti-phase input terminal b to which the voltage signal of the reference circuit 3 is applied through a resistance R4. Then, a resistance R1 is connected between an output terminal c and the anti-phase input terminal b, and a capacitor C1 for phase compensation is connected with the resistance R1 so that a feedback circuit can be formed.
Inventors:
Masaya Onishi
Application Number:
JP16663899A
Publication Date:
November 04, 2004
Filing Date:
June 14, 1999
Export Citation:
Assignee:
Sharp Corporation
International Classes:
H03F3/45; H03F3/08; (IPC1-7): H03F3/45; H03F3/08
Domestic Patent References:
| JP6283983A | ||||
| JP61200709A | ||||
| JP6244650A | ||||
| JP6244656A | ||||
| JP4064820U | ||||
| JP5211289A | ||||
| JP10163421A | ||||
| JP11097734A | ||||
| JP3147411A | ||||
| JP51032256A | ||||
| JP64106603A | ||||
| JP3085804A |
Attorney, Agent or Firm:
Shizuo Sano