Light-driving system capable of providing signal-measured calibration and a method for performing the same

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	Light-driving system capable of providing signal-measured calibration and a method for performing the same
其他题名	Light-driving system capable of providing signal-measured calibration and a method for performing the same
	CHANG, AN-NAN; CHEN, CHIEN-MING
	2008-09-18
专利权人	MEDIATEK INC.
公开日期	2008-09-18
授权国家	美国
专利类型	发明申请
摘要	This present invention discloses a light-driving system capable of providing an accurate calibration of signal measurement and a method for performing the same, including an automatic power control (APC) circuit which is pre-calibrated for a signal measurement process. By enlarging at least one measured pad of the APC circuit, multiple grounding paths are established via a plurality of probes of a test instrument. An impedance effect predicted on the contact between the probes and the pad is diminished greatly. A voltage value on the pad can be accurately measured. Thus, a reference voltage value input to a first input of a comparator of the APC circuit can be determined on a basis of a specific condition when a ramping voltage value input to a second input of the comparator is substantially equal to a sum of a predetermined reference voltage value and the voltage value of the pad.
其他摘要	本发明公开了一种能够提供信号测量的精确校准的光驱动系统及其执行方法，包括为信号测量过程预校准的自动功率控制（APC）电路。通过扩大APC电路的至少一个测量垫，通过测试仪器的多个探针建立多个接地路径。预测探针和焊盘之间接触的阻抗效应大大降低。可以精确地测量焊盘上的电压值。因此，当输入到比较器的第二输入的斜坡电压值基本上等于预定的总和时，可以基于特定条件确定输入到APC电路的比较器的第一输入的参考电压值。参考电压值和焊盘的电压值。
主权项	A method for determining a voltage value output to a first input of a comparator, the comparator electrically connected to a pad, comprising: probing the pad with a first probe to ground the pad via a first probing resistance; probing the pad with a second probe to measure a voltage value from the pad; providing a ramping voltage to a second input of the comparator; and tuning a digital to analog converter to determine the voltage value output from the digital to analog converter to the first input of the comparator on a basis of a specific condition when a value of the ramping voltage is substantially equal to a sum of a predetermined reference voltage value and the voltage value of the pad.
申请日期	2007-03-16
专利号	US20080224715A1
专利状态	授权
申请号	US11/687089
公开（公告）号	US20080224715A1
IPC 分类号	G01R31/00 \| G01R27/02
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/181661/62511
专题	半导体激光器专利数据库
作者单位	MEDIATEK INC.
推荐引用方式 GB/T 7714	CHANG, AN-NAN,CHEN, CHIEN-MING. Light-driving system capable of providing signal-measured calibration and a method for performing the same. US20080224715A1[P]. 2008-09-18.