Invention Grant
- Patent Title: Optical signal receiving circuit
- Patent Title (中): 光信号接收电路
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Application No.: US12350612Application Date: 2009-01-08
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Publication No.: US08170425B2Publication Date: 2012-05-01
- Inventor: Hiroyuki Yoshioka , Ryuichi Satomura , Hideyuki Takahashi , Hidefumi Yoshida
- Applicant: Hiroyuki Yoshioka , Ryuichi Satomura , Hideyuki Takahashi , Hidefumi Yoshida
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Miles & Stockbridge P.C.
- Priority: JP2008-074848 20080324
- Main IPC: H04B10/06
- IPC: H04B10/06

Abstract:
To solve problematic trade-off between a bandwidth and a in-band deviation in an optical signal receiving circuit of a gigabit order that is required to have a wide dynamic range, the optical signal receiving circuit has a current-voltage conversion circuit that receives as an input a current signal outputted from a photoelectric conversion circuit for receiving and converting an optical signal into a current signal and converts it into a voltage signal, and realizes the wide dynamic range by providing the current-voltage conversion circuit with an AGC function and a phase compensation function by MOS transistors and a capacitance. Further, by providing the current-voltage conversion circuit with a second phase compensation function by a MOS transistor and a capacitance, it is made possible for the optical signal receiving circuit to reduce the in-band deviation at the time of minimum gain while securing the bandwidth at the time of maximum gain.
Public/Granted literature
- US20090238581A1 OPTICAL SIGNAL RECEIVING CIRCUIT Public/Granted day:2009-09-24
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