Title:
POWER SUPPLY CONFIGURATION SOLUTION FOR DIRECT-CURRENT-COUPLED OUTPUT OF DFB LASER
Document Type and Number:
WIPO Patent Application WO/2023/108791
Kind Code:
A1
Abstract:
A power supply configuration solution for direct-current-coupled output of a DFB laser, relating to the field of laser drivers in optical communication integrated circuits. The present invention aims to solve the problems in existing power supply configuration solutions for DFB lasers. According to the power supply configuration solution in the present invention, an external or internal power supply configuration unit is used to provide two direct-direct power supplies having a fixed voltage difference for a DFB laser and a transmitting unit TX in an optical transceiver chip; moreover, the transmitting unit TX is optimized, and the optimization solution is as follows: transistors in the transmitting unit TX are all low-voltage high-speed transistors, and the transmitting unit TX comprises a negative capacitance structure formed by capacitors C1 and C2 as an auxiliary structure for increasing bandwidth; the minimum voltage of the power supply voltage port TVCC of the optimized transmitting unit TX is 2.7 V.
Inventors:
LI JINGHU (CN)
FAN ZHANG (CN)
SHI LIANGQIONG (CN)
YAO WEITAN (CN)
ZHENG WEIYIN (CN)
TU HANGHUI (CN)
FAN ZHANG (CN)
SHI LIANGQIONG (CN)
YAO WEITAN (CN)
ZHENG WEIYIN (CN)
TU HANGHUI (CN)
Application Number:
PCT/CN2021/141108
Publication Date:
June 22, 2023
Filing Date:
December 24, 2021
Export Citation:
Assignee:
XIAMEN EOCHIP SEMICONDUCTOR CO LTD (CN)
International Classes:
H01S5/042
Foreign References:
| CN111193185A | 2020-05-22 | |||
| US20090245807A1 | 2009-10-01 | |||
| CN1734912A | 2006-02-15 | |||
| CN112771444A | 2021-05-07 |
Attorney, Agent or Firm:
HARBIN SONGHUAJIANG PATENT TRADEMARK OFFICE (CN)
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