Lighting circuit of laser diode

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	Lighting circuit of laser diode
其他题名	Lighting circuit of laser diode
	MIYASHITA AKIRA; KOYAMA OSAMU; KATO TADASHI; KIMURA SHUNPEI; SAITO TORU; WATANABE YOSHIHIKO
	1991-01-21
专利权人	CANON INC
公开日期	1991-01-21
授权国家	日本
专利类型	发明申请
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.
其他摘要	用途：通过将电路中的点从高频电流输出端子连接到激光二极管，电源端子或接地端子通过电阻器，稳定地发出低噪声的光。组成：高频电流叠加集成电路（HF-IC）1的高频电流输出端子通过电容器3电容连接到激光二极管4的端子，并通过电容器3连接到电源端子VDD激光二极管4根据从信号端子SIG通过缓冲器5输入的信号以记录读出信号的速度控制发光电平，并且高频电流叠加地提供给激光二极管4。同时。由于HF-IC 1的输出端子通过电阻器2连接到电源端子VDD，因此即使振荡频率波动，在激光二极管4中流动的高频电流也具有相对于振荡频率的平坦特性。在电源电压的波动等方面，可以叠加稳定的高频电流。并且，这使得可以稳定地发出低噪声的光。
主权项	-
申请日期	1989-06-12
专利号	JP1991012978A
专利状态	失效
申请号	JP1989150060
公开（公告）号	JP1991012978A
IPC 分类号	G11B7/125 \| H01S5/042 \| H01S3/096
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	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[P]. 1991-01-21.

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