LASER DRIVER FOR DRIVING VCSEL

The present invention provides a laser driver for driving a vertical cavity surface emitting laser (VCSEL), comprising: a high-side switch (high-side field effect transistor) having an internal capacitor for charging with a drain terminal thereof connected to a high-voltage terminal; a low-side swit...

Full description

Saved in:
Bibliographic Details
Main Authors JANG DONG JU, AN SEON YONG, JANG JUN HWAN, KWEON KYOUNG CHUN, LIM CHAN M, JEONG HOON IL
Format Patent
LanguageEnglish
Korean
Published 19.09.2023
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:The present invention provides a laser driver for driving a vertical cavity surface emitting laser (VCSEL), comprising: a high-side switch (high-side field effect transistor) having an internal capacitor for charging with a drain terminal thereof connected to a high-voltage terminal; a low-side switch (low-side field effect transistor) in which a drain terminal thereof is connected to a source terminal of the high-side switch and a source terminal thereof is connected to a ground terminal; and a VCSEL diode having an anode terminal connected to the high-side switch. The present invention is capable of improving speed without cost increase and structure change by minimizing signal line resistance and optimizing capacitance in a FET without a separate capacitor configuration. 본 발명은 충전용 내부 캐패시터(capacitor)를 포함하며, 드레인(drain) 단자가 고전압 단자와 연결되는 하이사이드 스위치(High-side Field effect transistor), 드레인 단자가 상기 하이사이드 스위치의 소스(source) 단자와 연결되고, 소스 단자가 그라운드(ground) 단자와 연결되는 로우사이드 스위치(Low-side Field effect transistor) 및 애노드(anode) 단자가 상기 하이사이드 스위치와 연결되는 빅셀 다이오드(VCSEL diode)를 포함하는 빅셀 구동용 레이저 드라이버로서, 본 발명에 의하면, 별도의 캐패시터 구성 없이, 신호선 저항 값 최소화와 FET 내 캐피시턴스 최적화를 통해 원가 상승 및 구조 변경 없이 속도 향상이 가능하게 한다.
Bibliography:Application Number: KR20220029986