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US 6,333,804 B1Granted
Optical module for receiving optical signal from optical fiber
AssigneeSumitomo Electric Industries, Ltd.
InventorsNaoki Nishiyama, Mitsuaki Nishie
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Abstract
This optical module comprises a photodiode 1, a current mirror circuit 2 having two parallel lines, one of the lines being connected to the photodiode 1, and a transimpedance amplifier 3 connected to the photodiode 1. Since the current mirror circuit 2 is provided, the photocurrent from the line flows into the photodiode 1 and amplified by the transimpedance amplifier 3. This photocurrent is observed as a current flowing out of the other line of the current mirror circuit 2.
Claims4
An optical receiver comprising:
- a photodiode configured and arranged to receive an optical signal emitted from an optical fiber;
- a current mirror circuit, connected to one end of said photodiode;
- a transimpedance amplifier connected to the other end of said photodiode;
- a package, said photodiode, said current mirror circuit and said transimpedence amplifier being arranged therein;
- a position fixing member attaching said optical fiber to said package;
- and
- a support member arranged in said package, supporting both of said photodiode and said transimpedance amplifier
- wherein said current mirror circuit has first and second n-channel field-effect transistors, said transistors having their respective gates connected to the other transistor's source.
5 more elements
Dependencies are inferred from the claim text.