发明名称 |
TRANSIMPEDANCE AMPLIFIER, SEMICONDUCTOR DEVICE, AND OPTICAL MODULE |
摘要 |
An optical module including a transimpedance amplifier capable of realizing a high-speed and high-quality receiving operation is provided. A transimpedance amplifier includes: a pre-amplifier using a single-end current signal as an input and converting the single-end current signal to a single-end voltage signal; an automatic decision threshold control detecting a center electric potential of the single-end voltage signal serving as an output of the pre-amplifier; a post-amplifier differentiating and amplifying the single-end voltage signal of the output of the pre-amplifier; and a power circuit supplying power to the pre-amplifier. Particularly, in accordance with an input voltage signal or an output voltage signal of the pre-amplifier, the power circuit outputs a varied current that flows to a supply terminal of the pre-amplifier and a varied current having a phase opposite to that of the varied current. Thus, the power supply current change is cancelled out.
|
申请公布号 |
US2013016748(A1) |
申请公布日期 |
2013.01.17 |
申请号 |
US201213546382 |
申请日期 |
2012.07.11 |
申请人 |
HITACHI, LTD.;TAKEMOTO TAKASHI;YAMASHITA HIROKI;TSUJI SHINJI |
发明人 |
TAKEMOTO TAKASHI;YAMASHITA HIROKI;TSUJI SHINJI |
分类号 |
H01S3/10;H03F3/45 |
主分类号 |
H01S3/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|