发明名称 |
High performance DVD writing current circuit |
摘要 |
A writing current circuit (42) supplies a controlled electrical current to a laser diode (34) for recording data swiftly onto a DVD (16). A plurality of thermometer code registers (52) respectively store numerical values. A current control register (58) receives a numerical value from one of the thermometer code registers (52). Serial data specifies a sequence in which individual thermometer code registers (52) supply values to the current control register (58) thereby causing the writing current circuit (42) to supply a particular electrical current waveform to the laser diode (34). A plurality of current sources (62) respectively receive a single output signal from the current control register (52) which activates or deactivates individual current sources (62) for supplying a particular quantity of current to the laser diode (34).
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申请公布号 |
US7570568(B2) |
申请公布日期 |
2009.08.04 |
申请号 |
US20050585399 |
申请日期 |
2005.01.14 |
申请人 |
SILICON CORE TECHNOLOGY, INC. |
发明人 |
LI ERIC |
分类号 |
G11B7/00;G01L1/04;G01N3/00;G01N3/02;G01N3/20 |
主分类号 |
G11B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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