公开(公告)号：US06028871A

公开(公告)日：2000-02-22

申请号：US178312

申请日：1998-10-23

申请人： John Barry Vaughan ,  David Philip Martin Chown ,  David Martin Gee

发明人： John Barry Vaughan ,  David Philip Martin Chown ,  David Martin Gee

IPC分类号： H01S5/00 ,  H01S5/042 ,  H01S5/062 ,  H01S5/068 ,  H05B33/08 ,  H01S3/00

CPC分类号： H05B33/0812 ,  H01S5/042 ,  H05B33/0803 ,  H01S5/0427 ,  H01S5/06825

摘要： The present invention relates to a circuit for driving a solid state optical emitter device such as a laser diode, and in particular a circuit which limits the maximum current which may be drawn through the device. The circuit comprises a current supply path and a current return path to which the optical emitter may be connected, and a current limit device to limit a maximum current that may flow through one of the current paths. The current limit device has a current mirror with an input portion and an output portion, the circuit being arranged so that when a first current flows through the input portion, the second portion is predisposed to supply a second current up to a maximum which mirrors the first current. The maximum current through the paths is thereby limited in accordance with the maximum of the second current.

摘要翻译： 本发明涉及一种用于驱动诸如激光二极管的固态光发射器件的电路，特别是限制可通过该器件绘制的最大电流的电路。 电路包括电流供应路径和光发射器可以连接到的电流返回路径，以及限制可能流过电流路径之一的最大电流的限流装置。 电流限制装置具有带有输入部分和输出部分的电流镜，电路被布置成使得当第一电流流过输入部分时，第二部分被预先设置以提供最大值的第二电流， 第一流。 因此，通过路径的最大电流根据第二电流的最大值而受到限制。

公开(公告)号：US06809403B2

公开(公告)日：2004-10-26

申请号：US10046812

申请日：2002-01-17

申请人： David Martin Gee

发明人： David Martin Gee

IPC分类号： H01L23552

CPC分类号： H01S5/042 ,  H01L21/768 ,  H01L23/552 ,  H01L23/62 ,  H01L2924/0002 ,  H05K1/0219 ,  H05K1/0298 ,  H01L2924/00

摘要： An electrical circuit and method substantially to mitigate the effects of a current increase due to a fault within the circuit. In particular, where the electrical circuit (80) includes a laser diode it is desirable to create a fault tolerant circuit to avoid a sudden increase in light intensity output by the laser diode. A track (44b) associated with the laser diode is identified and insulated by means of a layout of the circuit. Specifically, where the circuit is an integrated circuit, metal layers (42, 44, 46) and vias (50) are utilised to form an insulating shield (76) around the track (44b) associated with the laser diode.

摘要翻译： 一种基本上减轻由于电路内的故障引起的电流增加的影响的电路和方法。 特别地，在电路（80）包括激光二极管的情况下，期望创建容错电路以避免由激光二极管输出的光强度的突然增加。 与激光二极管相关联的轨道（44b）通过电路的布局来识别和绝缘。 具体地，在电路是集成电路的情况下，金属层（42,44,46）和通孔（50）被用于形成围绕与激光二极管相关的轨道（44b）的绝缘屏蔽（76）。

公开(公告)号：US06586918B2

公开(公告)日：2003-07-01

申请号：US10041470

申请日：2002-01-10

申请人： David Martin Gee

发明人： David Martin Gee

IPC分类号： G05F156

CPC分类号： H01S5/042 ,  G05F3/265 ,  H01S5/0427

摘要： To provide a stabilized current to a current modulator or the like in a limited voltage headroom environment, the a current mirror having first and second mirror transistors is provided. Bases of the transistors are coupled together through a resistive element, with base leakage current to the first transistor generating a voltage drop across the resistive element. The voltage drop acts to boost a voltage through an emitter resistor of an output stage of the current mirror, the output stage realized by at least the second mirror transistor. With boosting of the voltage through the emitter resistor there is a corresponding boost in output current defined by the voltage across emitter resistor. As such, the circuit effectively increases the operating voltage and hence the voltage headroom derived from a supply voltage provided to the bases of the first and second mirror transistors.

摘要翻译： 为了在有限的电压余量环境中向电流调制器等提供稳定的电流，提供了具有第一和第二反射镜晶体管的电流镜。 晶体管的基极通过电阻元件耦合在一起，其中第一晶体管的基极漏电流产生电阻元件两端的电压降。 电压降用于通过电流镜的输出级的发射极电阻升高电压，该输出级由至少第二镜像晶体管实现。 通过发射极电阻的电压升高，由发射极电阻两端的电压确定的输出电流有相应的升压。 因此，电路有效地增加工作电压，并因此有效地增加了提供给第一和第二镜晶体管的基极的电源电压所导致的电压余量。

公开(公告)号：US06831520B2

公开(公告)日：2004-12-14

申请号：US10295620

申请日：2002-11-15

申请人： David Martin Gee

发明人： David Martin Gee

IPC分类号： H03F304

CPC分类号： H03K5/02 ,  H01L27/0255 ,  H01S5/042

摘要： An amplifier circuit apparatus for driving a laser device, the apparatus comprising a multistage amplifier including an output stage, wherein at least one device for band limiting a signal is coupled to the multistage amplifier prior to the output stage.

摘要翻译： 一种用于驱动激光装置的放大器电路装置，该装置包括一个包括输出级的多级放大器，其中用于频带限制信号的至少一个装置在输出级之前耦合到多级放大器。

公开(公告)号：US07064686B2

公开(公告)日：2006-06-20

申请号：US11014250

申请日：2004-12-17

申请人： David Martin Gee

发明人： David Martin Gee

IPC分类号： H03M7/00

CPC分类号： H04L25/0262

摘要： A data rate determination apparatus includes an edge detection and clock generation circuit for receiving an input bit stream. The edge detection and clock generation circuit generates a pulse for each edge detected in the input bit stream. The pulses are passed to a programmable re-triggerable monostable multivibrator circuit coupled to a binary counter, which counts how many pulses are received within a time period determined by the number of pulses received at a rate higher than a predetermined rate. The binary counter is coupled to a Gray code counter coupled to a processing unit. The processing unit uses different counts that are accumulated over different sampling periods with different predetermined rates to establish statistical data, which can be compared to known data for different data rate standards or formats.

摘要翻译： 数据速率确定装置包括用于接收输入比特流的边缘检测和时钟生成电路。 边缘检测和时钟产生电路在输入比特流中检测到的每个边缘产生脉冲。 脉冲被传递到耦合到二进制计数器的可编程可重复触发的单稳态多谐振荡器电路，二进制计数器计数在由高于预定速率的速率接收的脉冲数确定的时间段内接收多少个脉冲。 二进制计数器耦合到耦合到处理单元的格雷码计数器。 处理单元使用在具有不同预定速率的不同采样周期上累积的不同计数来建立统计数据，其可以与用于不同数据速率标准或格式的已知数据进行比较。

公开(公告)号：US06995588B2

公开(公告)日：2006-02-07

申请号：US10425711

申请日：2003-04-30

申请人： David Martin Gee

发明人： David Martin Gee

IPC分类号： H03K5/22

CPC分类号： G01K7/01

摘要： A temperature sensor apparatus comprises a pair of parallel circuit branches each including a pn semiconductor junction coupled in series to an impedance. The pn semiconductor junctions have different cross-sectional areas. An amplification stage comprises a CMOS input stage coupled respectively across each pn semiconductor junction and a FET transistor output stage (coupled to a load impedance) that generates an amplified output signal corresponding to the pn semiconductor junction temperature.

摘要翻译： 温度传感器装置包括一对并联电路支路，每一对并联电路支路均包含与阻抗串联耦合的pn半导体结。 pn半导体结具有不同的横截面积。 放大级包括分别跨越每个pn半导体结耦合的CMOS输入级和产生对应于pn半导体结温度的放大输出信号的FET晶体管输出级（耦合到负载阻抗）。