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	Lighting circuit of laser diode
	MIYASHITA AKIRA; KOYAMA OSAMU; KATO TADASHI; KIMURA SHUNPEI; SAITO TORU; WATANABE YOSHIHIKO
	1991-01-21
著作权人	CANON INC
专利号	JP1991012978A
国家	日本
文献子类	发明申请
其他题名	Lighting circuit of laser diode
英文摘要	PURPOSE:To emit light with low noise stably by connecting a point in a circuit from a high-frequency current output terminal to a laser diode, with a power source terminal or grounding terminal through a resistor. CONSTITUTION:The high-frequency current output terminal of a high-frequency current superposed integrated circuit (HF-IC) 1 is capacitively connected to a terminal of a laser diode 4 through a capacitor 3, and connected to a power source terminal VDD through a resistor 2. The laser diode 4 controls the lighting level with a speed of a record readout signal according to a signal inputted from a signal terminal SIG through a buffer 5, and a high-frequency current is superposedly supplied to the laser diode 4 at the same time. As the output terminal off HF-IC 1 is connected to the power source terminal VDD through the resistor 2, the high-frequency current flowing in the laser diode 4 has a flat characteristic with respect to the oscillation frequency even if the oscillation frequency fluctuates because of the fluctuation of the power source voltage, etc., and it becomes possible for a stable high-frequency current to be superposed. And, this makes it possible to emit light with low noise stably.
公开日期	1991-01-21
申请日期	1989-06-12
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/59634]
专题	半导体激光器专利数据库
作者单位	CANON INC
推荐引用方式 GB/T 7714	MIYASHITA AKIRA,KOYAMA OSAMU,KATO TADASHI,et al. Lighting circuit of laser diode. JP1991012978A. 1991-01-21.

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