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1. 发明授权

US5226051A Laser pump control for output power stabilization 失效
标题翻译：激光泵控制输出功率稳定
公开(公告)号：US5226051A
公开(公告)日：1993-07-06
申请号：US710288
申请日：1991-06-04
申请人： Melvin Chan , Henry G. Plaessman , Frank Adams , William M. Grossman
发明人： Melvin Chan , Henry G. Plaessman , Frank Adams , William M. Grossman
IPC分类号： H01S3/0941 , H01S3/11 , H01S3/131 , H01S5/042
CPC分类号： H01S3/115 , H01S3/0941 , H01S3/117 , H01S3/1312 , H01S5/042
摘要： Method and apparatus for stabilization of pulse energies produced by a continuously pumped, Q-switched, solid-state or gas laser, through control of the optical power delivered by an optical pump to the laser, in order to limit the energy emitted in any single laser pulse as a result of Q-switching. The laser pump is driven at full strength for a selected initial refresh time t.sub.r. If a Q-switch trigger signal is received by the laser before the elapsed time .DELTA.t has reached the refresh time t.sub.r, the laser emits a pulse with the reduced energy stored in the laser at that time. If the elapsed time reaches or exceeds the refresh time t.sub.r, the optical pump power subsequently delivered to the laser is reduced to a lower level, which may be time-dependent, that is sufficient to maintain the net energy stored in the laser at a predetermined value so that the energy in a subsequently emitted laser pulse does not exceed a selected limit. Numerous techniques for controlling the optical pump power delivered are disclosed.
摘要翻译：通过控制由光泵向激光器传递的光功率，通过连续泵浦，Q开关，固态或气体激光器产生的脉冲能量的稳定化方法和装置，以限制在任何单个激光脉冲作为Q开关的结果。激光泵以全强度驱动以选择初始刷新时间tr。如果在经过时间DELTA t达到刷新时间tr之前由激光器接收到Q开关触发信号，那么激光器在那时发射存储在激光器中的能量减少的脉冲。如果经过的时间达到或超过刷新时间tr，则随后输送到激光器的光泵浦功率被降低到较低的水平，其可能是时间依赖性的，其足以将存储在激光器中的净能量保持在预定的使得随后发射的激光脉冲中的能量不超过选定的极限。公开了用于控制递送的光泵功率的许多技术。

2. 发明授权

US5315174A Programmable output slew rate control 失效
标题翻译：可编程输出转换速率控制
公开(公告)号：US5315174A
公开(公告)日：1994-05-24
申请号：US930969
申请日：1992-08-13
申请人： Herman M. Chang , Melvin Chan
发明人： Herman M. Chang , Melvin Chan
IPC分类号： H03K17/16 , H03K19/003 , H03K19/0175 , H03K19/0185 , H03K19/173 , H03K19/092
CPC分类号： H03K19/018585 , H03K19/00361
摘要： An output buffer circuit is disclosed that minimizes ground bounce problems. The buffer circuit provides for an output pull-down pre-driver circuit that can be controlled by a programmable signal to minimize the ground bounce. By placing a strong and weak transistor on the gate of the output driver transistor and providing control circuitry for disabling the stronger transistor appropriately, an output signal is provided that can be driven quickly or slowly to its active level. By disabling the stronger transistor, ground bounce problems associated with high to low transitions of output drive transistor are significantly reduced.
摘要翻译：公开了一种使地面反弹问题最小化的输出缓冲电路。缓冲电路提供可由可编程信号控制的输出下拉预驱动器电路，以最小化接地反弹。通过在输出驱动晶体管的栅极上放置一个强弱的晶体管，并提供适当禁用更强的晶体管的控制电路，可提供可以快速或缓慢地驱动到其有效电平的输出信号。通过禁用更强的晶体管，与输出驱动晶体管的高到低转换相关的接地反弹问题显着降低。

3. 发明授权

US4633413A Digital dilution apparatus and method 失效
标题翻译：数字稀释仪及方法
公开(公告)号：US4633413A
公开(公告)日：1986-12-30
申请号：US518217
申请日：1983-07-28
申请人： Robert Caveney , Dana Gilliam , Melvin Chan , Michael Bailey
发明人： Robert Caveney , Dana Gilliam , Melvin Chan , Michael Bailey
IPC分类号： G01N1/38 , G01N31/16 , G06F15/42 , B67D5/30
CPC分类号： G01N1/38 , G01N31/16 , G01N2001/382
摘要： Digital dilution apparatus is disclosed which performs multiple processing functions such as pipetting, diluting, titrations and the like under microprocessor control. The apparatus is responsive to operator-entered processing requests and performs complex and accurate processing functions. The disclosed apparatus is quite simple and easy to operate and does not require a highly skilled operator.
摘要翻译：公开了在微处理器控制下执行诸如移液，稀释，滴定等多种处理功能的数字稀释装置。该装置响应于操作者输入的处理请求并且执行复杂而准确的处理功能。所公开的装置相当简单且易于操作，并且不需要高技能的操作者。

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