The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 17, 2021
Filed:
Jan. 12, 2020
Anhui Transilica Microelectronics Co., Ltd., Hefei, CN;
Jiangsu Keda Hengxin Semicon Tech Co., Ltd., Suzhou, CN;
ANHUI TRANSILICA MICROELECTRONICS CO., LTD., Hefei, CN;
JIANGSU KEDA HENGXIN SEMICON TECH CO., LTD., Suzhou, CN;
Abstract
A laser driver with high-speed and high-current and current modulating method thereof is invented. The laser driver includes a first driving unit and a second driving unit, each driving unit including a pre-drive amplifier circuit and a main drive amplifier circuit. The pre-drive amplifier circuit includes a first differential transistor pair circuit, a differential voltage conversion circuit, a DC common mode level reduction circuit and a first cascode current mirror circuit. The main drive amplifier circuit includes a second differential transistor pair circuit, a bandwidth boost circuit, a matching circuit and a second cascode current mirror circuit. The present invention avoids the enhancement of chip area caused by the use of passive inductors peaking mode to enhance bandwidth, and reduces the cost of chip, design complexity and circuit power consumption.