发明名称 |
Driver circuit and optical-transmission module |
摘要 |
A driver circuit comprises a first differential-amplifier circuit having a pair of first transistors with emitters thereof connected to each other and a first resistor provided between an emitter connection point of the first transistors and a first power supply. Different electric potentials are applied to the bases of the pair of the first transistors to set a ratio of a current flowing through one of the pair of the first transistors to a current flowing through the other first transistor at about 1/100 or smaller. An amplitude of an output current is controlled by the higher of the electric potentials applied to the base of one of the first transistors.
|
申请公布号 |
US6606177(B1) |
申请公布日期 |
2003.08.12 |
申请号 |
US19990392566 |
申请日期 |
1999.09.09 |
申请人 |
HITACHI, LTD. |
发明人 |
CHUJO NORIO;HAYASHI YOSHIHIKO;OSAKI AKIO;BABA NAOHIKO |
分类号 |
H04B10/155;H04B10/50;H04B10/564;H04L25/02;(IPC1-7):H04B10/04 |
主分类号 |
H04B10/155 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|