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...
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Format: | Patent |
Sprache: | eng ; kor |
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Zusammenfassung: | 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. |
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