Invention Grant
- Patent Title: Optical receiving circuit
- Patent Title (中): 光接收电路
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Application No.: US14092125Application Date: 2013-11-27
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Publication No.: US09025971B2Publication Date: 2015-05-05
- Inventor: Satoshi Ide
- Applicant: Fujitsu Limited
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Staas & Halsey LLP
- Priority: JP2013-002767 20130110
- Main IPC: H04B10/06
- IPC: H04B10/06 ; H04B10/69

Abstract:
An optical receiving circuit includes: a first non-feedback amplifier configured to convert a current signal, obtained from a light receiving element in response to an optical signal, into a first voltage signal; a second amplifier configured to convert an input current signal into a second voltage signal, the output signal not being directly fed back to an input side; a differential amplifier configured to perform differential amplification on the first voltage signal and the second voltage signal and to output an in positive signal and a negative signal obtained through the differential amplification; and an offset compensation circuit configured to input, on the basis of the in positive signal and the negative signal output from the differential amplifier, an offset current signal in accordance with an offset of a level of the in positive signal from a level of the negative signal to the second amplifier.
Public/Granted literature
- US20140193164A1 OPTICAL RECEIVING CIRCUIT Public/Granted day:2014-07-10
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