Semiconductor laser light quantity control signal generator

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	Semiconductor laser light quantity control signal generator
其他题名	Semiconductor laser light quantity control signal generator
	EMA HIDETOSHI
	1990-11-19
专利权人	RICOH CO LTD
公开日期	1990-11-19
授权国家	日本
专利类型	发明申请
摘要	PURPOSE:To prevent a semiconductor laser light quantity control signal from being affected by the glitch settling time of a D/A converter by a method wherein digital data is successively converted to analog signals, and each analog signal is determined, successively fetched by a plurality of switching circuits, and outputted as a semiconductor laser light quantity control signal. CONSTITUTION:Digital data to be converted to analog signals to be outputted as semiconductor laser light quantity control signals is inputted to current output-type D/A converters 11, 12 with the number of bits in accordance with a required resolving power. The D/A converters 11, 12 start the conversion of the input data to analog signal currents I1, I2 at the rising timing of a clock signal CLK. After a settling time depending on the D/A converter elapses, output currents become the analog signal currents I1, I2 that have been determined at the rising timing of the clock signal CLK correspondingly to the input data. The analog signal currents I3, I2 have been held until a next clock signal CLK rising. In this manner, a semiconductor laser light quantity control signal can be generated at high speed without being affected by the glitch settling time of the D/A converter.
其他摘要	用途：通过数字数据连续转换为模拟信号的方法防止半导体激光光量控制信号受到D / A转换器的毛刺稳定时间的影响，并确定每个模拟信号，由多个连续取出开关电路，作为半导体激光光量控制信号输出。组成：将要转换为模拟信号的数字数据作为半导体激光光量控制信号输出，并根据所需的分辨率输入到具有位数的电流输出型D / A转换器11,12。 D / A转换器11,12在时钟信号CLK的上升定时开始将输入数据转换为模拟信号电流I1，I2。在取决于D / A转换器经过的建立时间之后，输出电流变为在时钟信号CLK的上升定时对应于输入数据确定的模拟信号电流I1，I2。模拟信号电流I3，I2一直保持到下一个时钟信号CLK上升。以这种方式，可以高速产生半导体激光光量控制信号，而不受D / A转换器的假信号建立时间的影响。
主权项	-
申请日期	1989-04-24
专利号	JP1990281975A
专利状态	失效
申请号	JP1989104092
公开（公告）号	JP1990281975A
IPC 分类号	B41J2/44 \| G03G15/04 \| H01S5/06 \| H01S3/103
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/181661/59627
专题	半导体激光器专利数据库
作者单位	RICOH CO LTD
推荐引用方式 GB/T 7714	EMA HIDETOSHI. Semiconductor laser light quantity control signal generator. JP1990281975A[P]. 1990-11-19.

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