OPTICAL RECEIVER CIRCUIT AND OPTICAL RECEIVER

PROBLEM TO BE SOLVED: To provide an optical receiver circuit (200).SOLUTION: An optical receiver circuit includes: a photo detector (207) configured to convert a received light signal to an input current signal; a transimpedance amplifier circuit (201) with an input to receive the input current sign...

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Bibliographische Detailangaben
Hauptverfasser: LUIS ROLINDEZ ALBERICH, RODRIGUEZ PEREZ ALBERTO, RUBEN PEREZ DE ARANDA ALONSO
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide an optical receiver circuit (200).SOLUTION: An optical receiver circuit includes: a photo detector (207) configured to convert a received light signal to an input current signal; a transimpedance amplifier circuit (201) with an input to receive the input current signal from the photo detector, the transimpedance amplifier circuit being configured to convert the received input current signal to an output voltage signal to generate an output signal of the transimpedance amplifier circuit, and including a plurality of gain amplifier stages (209, 210, 211); a DC restoration component (205) configured to receive the output voltage signal of the transimpedance amplifier circuit for restoring the DC component of the received current signal and configured for outputting a corresponding current signal; and an automatic gain control component (204) configured for controlling, via programmable feedback resistors (226, 227), the equivalent transimpedance of the transimpedance amplifier circuit on the basis of the output signal of the DC restoration component to provide a constant output voltage amplitude for different current ranges of the input current signal.SELECTED DRAWING: Figure 2 【課題】この発明は光受信機回路(200)に関する。【解決手段】光受信機回路は、受信光信号を入力電流信号に変換するよう構成された光検出器(207)と、光検出器から入力電流信号を受信するよう入力を有し、受信入力電流信号を出力電圧信号に変換してトランスインピーダンス増幅器回路(201)の出力信号を生成するよう構成され、複数の利得増幅器段(209、210、211)を含むトランスインピーダンス増幅器回路と、受信電流信号のDC成分を再生するためにトランスインピーダンス増幅器回路の出力電圧信号を受信し、対応の電流信号を出力するよう構成される直流分再生構成要素(205)と、プログラマブルフィードバック抵抗(226,227)を介して、トランスインピーダンス増幅器回路の等価トランスインピーダンスを、直流分再生構成要素の出力信号に基づいて制御して、入力電流信号の異なる電流範囲に対して、一定の出力電圧振幅を与えるための自動利得制御構成要素(204)とを備える。【選択図】図2