Pre-amplifier for optical receiving and optical receiver using t

Details Pre-amplifier for optical receiving and optical receiver using t Pre-amplifier for optical receiving and optical receiver using t

1993-08-17

1995-01-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214A, 327514, H01J 4014

Patent

active

053861094

ABSTRACT:
The present invention relates to an optical receiving pre-amplifier and an optical receiver using the same. The object of the invention is to provide an optical receiving pre-amplifier having an enlarged dynamic range to a large output swing, and an optical receiver having a simplified circuit configuration and a sufficient eye aperture and suitable for a parallel transmission. The optical receiving pre-amplifier includes an input FET 10 with a gate terminal 10a to receive a current signal from a light receiving element and an output FET 12 with the gate terminal 12a connected to the signal terminal 10b of the input FET 10 to amplify and output the current signal to a predetermined voltage signal. A feedback resistor 14 is connected between the gate terminal 10a of the input FET 10 and the output terminal 19 of the output FET 12. A current source 15 can enlarge an output potential amplitude of the output FET 12 to a light signal change and is arranged between the gate terminal 10a of the input FET 10 and the power source 17.

REFERENCES:
patent: 4498197 (1985-02-01), Chown
patent: 4764732 (1988-08-01), Dion
patent: 4791286 (1988-12-01), Wall
patent: 4808810 (1989-02-01), Van Doorn

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