公开(公告)号：US06795752B1

公开(公告)日：2004-09-21

申请号：US09705996

申请日：2000-11-03

申请人： Yang Zhao ,  Adrian Paul Brokaw ,  Michael E. Rebeschini ,  Albert M. Leung ,  Gregory P. Pucci ,  Alexander Dribinsky

发明人： Yang Zhao ,  Adrian Paul Brokaw ,  Michael E. Rebeschini ,  Albert M. Leung ,  Gregory P. Pucci ,  Alexander Dribinsky

IPC分类号： G01P1500

CPC分类号： G01P15/008 ,  G01P15/08 ,  G01P15/12

摘要： An integrated convective accelerometer device. The device includes a thermal acceleration sensor having a thermopile and a heater element; control circuitry for providing closed-loop control of the thermopile common-mode voltage; an instrumentation amplifier; clock generation circuitry; voltage reference circuitry; a temperature sensor; and, output amplifiers. The device can be operated in an absolute or ratiometric mode. Further, the device is formed in a silicon substrate using standard semiconductor processes and is packaged in a standard integrated circuit package.

摘要翻译： 一体化对流加速度计装置。 该装置包括具有热电堆和加热元件的热​​加速度传感器; 用于提供热电堆共模电压的闭环控制的控制电路; 仪表放大器; 时钟发生电路; 电压参考电路; 温度传感器; 和输出放大器。 该设备可以以绝对或比例模式运行。 此外，使用标准半导体工艺在硅衬底中形成器件，并封装在标准集成电路封装中。

公开(公告)号：US06822512B2

公开(公告)日：2004-11-23

申请号：US10378704

申请日：2003-03-04

申请人： Adrian Paul Brokaw

发明人： Adrian Paul Brokaw

IPC分类号： H03F345

CPC分类号： H03F3/45085 ,  H03F1/083 ,  H03F2203/45454 ,  H03F2203/45646 ,  H03F2203/45674

摘要： A high gain amplifier includes a differential amplifier stage having a pair of transistors; first and second input circuits for providing input signals to the pair of transistors; transistor means arranged as a differential-to-single-ended converter driven by the differential amplifier stage to provide a single ended output signal; an intermediate gain stage having an input responsive to the single ended output signal; bias means for the differential amplifier, the bias means including circuit means for maintaining the currents through the pair of transistors in constant ratio independently of changes in load at the intermediate gain stage; and an inverting gain output stage driven by the intermediate gain stage and having an output for driving a load substantially from rail to rail. Also disclosed is a frequency compensation capacitor circuit connected between the input of the intermediate gain stage and the output of the inverting gain output stage.

摘要翻译： 高增益放大器包括具有一对晶体管的差分放大器级; 用于向所述一对晶体管提供输入信号的第一和第二输入电路; 晶体管装置被布置为由差分放大器级驱动的差分到单端转换器，以提供单端输出信号; 具有响应于单端输出信号的输入的中间增益级; 用于差分放大器的偏置装置，偏置装置包括电路装置，用于独立于中间增益级的负载变化，保持恒定比例的一对晶体管的电流; 以及由中间增益级驱动并具有用于基本上从轨到轨驱动负载的输出的反相增益输出级。 还公开了连接在中间增益级的输入端和反相增益输出级的输出端之间的频率补偿电容器电路。

公开(公告)号：US06677807B1

公开(公告)日：2004-01-13

申请号：US09703862

申请日：2000-11-01

申请人： Adrian Paul Brokaw

发明人： Adrian Paul Brokaw

IPC分类号： G05F110

CPC分类号： G05F3/265

摘要： A current mirror replica biasing system where the resistor-programmable base current of a current reference transistor is accurately and scalably mirrored and input to the base of an output transistor, the current provided by the output transistor being useful as bias current to a load circuit, including a current reference transistor and an output transistor of like polarity; a pair of bipolar transistors, of like polarity to each other and opposite polarity to the current reference transistor and output transistor, arranged as a current mirror to mirror the base current of the current reference transistor, which base is exclusively interconnected to the input of the current mirror; and a current source to establish a desired reference current in the current reference transistor; wherein variations in the current source circuitry can result in circuit performance of the current mirror replica biasing system that is proportional to absolute temperature, or other desired function.

摘要翻译： 电流镜复制偏置系统，其中电流参考晶体管的电阻器可编程基极电流被精确和可缩放地镜像并输入到​​输出晶体管的基极，由输出晶体管提供的电流用作到负载电路的偏置电流， 包括电流参考晶体管和类似极性的输出晶体管; 一对双极晶体管，彼此具有相同的极性，与电流参考晶体管和输出晶体管相反极性，被布置为电流镜以镜像电流参考晶体管的基极电流，该基极专门与 电流镜 以及电流源，以在所述电流参考晶体管中建立期望的参考电流; 其中电流源电路中的变化可导致与绝对温度成正比的电流镜复制偏压系统的电路性能或其他所需功能。

公开(公告)号：US06346812B1

公开(公告)日：2002-02-12

申请号：US09423888

申请日：1999-11-12

申请人： Lutz Axel May ,  Adrian Paul Brokaw

发明人： Lutz Axel May ,  Adrian Paul Brokaw

IPC分类号： G01R3304

CPC分类号： G01L3/102 ,  G01L3/105

摘要： A circuit for sensing a magnetic field has at least one saturable coil (L1). The circuit includes switches (S1, S2) controlled by a comparator (12) to drive the coil (L1) to saturation by alternating polarities of current. In the absence of an external magnetic field the currents are balanced. An applied external magnetic field causes an unbalance in the coil (L1) in reaching saturation. An unbalance current is applied through a sensing resistor (R2) to an integrator (20) to develop an output voltage (Vo) as a measure of the applied magnetic field. The switches (S1, S2) are implemented by transistor switches. Dual (FIG. 1) and single (FIG. 2) supply rail circuits are disclosed. The circuit finds particular application in torque transducers using magnetoelastic elements.

摘要翻译： 用于感测磁场的电路具有至少一个可饱和线圈（L1）。 电路包括由比较器（12）控制的开关（S1，S2），以通过交流的电流极性驱动线圈（L1）达到饱和。 在没有外部磁场的情况下，电流是平衡的。 施加的外部磁场导致线圈（L1）中的不平衡达到饱和。 通过感测电阻器（R2）将不平衡电流施加到积分器（20），以产生作为施加磁场的量度的输出电压（Vo）。 开关（S1，S2）由晶体管开关实现。 公开了双（图1）和单（图2）电源轨电路。 该电路在使用磁弹性元件的扭矩传感器中具体应用。

公开(公告)号：US4029974A

公开(公告)日：1977-06-14

申请号：US631844

申请日：1975-11-13

申请人： Adrian Paul Brokaw

发明人： Adrian Paul Brokaw

IPC分类号： G01K7/01 ,  G05F3/26 ,  H03M1/00 ,  H03K1/00 ,  H01L35/00 ,  H01V3/00

CPC分类号： G05F3/265 ,  G01K7/01 ,  H03M1/366

摘要： A digital-to-analog converter of the type formed with a plurality of current source transistors arranged to carry different levels of current according to a predetermined weighting pattern, e.g., a binary weighting pattern. In the converter, a plurality of identically sized current source transistors carry the different levels of current and thus operate at different current densities with different base-to-emitter voltages subject to temperature drift. Stable emitter voltages, providing accurate levels of weighted current, are developed by means of resistances between the bases of successive current source transistors and a current source for developing across the interbase resistances a voltage linearly varying with absolute temperature, corresponding to the difference between base-to-emitter voltages of the successive current source transistors.The apparatus for generating a current linearly varying with absolute temperature is formed with first and second transistors forced to carry the same current at different current densities to produce different base-to-emitter voltages, and means such as an emitter resistor responsive to the difference in the base-to-emitter voltages for developing a current, corresponding to the difference in base-to-emitter voltages, which varies linearly with temperature.

摘要翻译： 一种数模转换器，其形成有多个电流源晶体管，其被布置为根据预定加权模式（例如二进制加权模式）传送不同电平的电流。 在转换器中，多个相同大小的电流源晶体管承载不同电平的电流，因此以不同的基极 - 发射极电压经受温度漂移的不同电流密度工作。 通过连续电流源晶体管的基极之间的电阻和用于在跨基准电阻之间形成的绝缘温度线性变化的电压的电流源开发稳定的发射极电压，提供精确的加权电流水平，对应于基极 - 连续电流源晶体管的发射极间电压。

公开(公告)号：US06380807B1

公开(公告)日：2002-04-30

申请号：US09718742

申请日：2000-11-22

申请人： Adrian Paul Brokaw

发明人： Adrian Paul Brokaw

IPC分类号： H03F345

CPC分类号： H03F3/45085 ,  H03F3/45538 ,  H03F2203/45371 ,  H03F2203/45476 ,  H03F2203/45594

摘要： A dynamic bridge system with common mode range extension includes a dynamic bridge circuit having a pair of input terminals for receiving common mode and normal signals, a pair of intermediate terminals and an output terminal and reference terminal; a differential amplifier has its inputs connected to the intermediate terminals and its output connected to the output terminal; a pair of balanced loads is each connected at one end to an intermediate terminal; and an inverting amplifier responsive to the common mode signal at the inputs of the differential amplifier drives the other ends of the balanced loads in opposition to changes in the common mode signals at the inputs of the differential amplifier.

摘要翻译： 具有共模范围扩展的动态桥接系统包括具有用于接收共模和正常信号的一对输入端的动态桥电路，一对中间端和输出端和参考端; 差分放大器的输入端连接到中间端子，其输出端连接到输出端子; 一对平衡负载的一端分别连接到中间端子; 并且在差分放大器的输入处响应于共模信号的反相放大器驱动平衡负载的另一端，与差动放大器输入端的共模信号的变化相反。

公开(公告)号：US3940760A

公开(公告)日：1976-02-24

申请号：US560954

申请日：1975-03-21

申请人： Adrian Paul Brokaw

发明人： Adrian Paul Brokaw

IPC分类号： H03M1/06 ,  G05F3/26 ,  H03M1/00 ,  H03M1/74 ,  H03M1/78 ,  H03K13/04

CPC分类号： G05F3/265 ,  H03M1/0607

摘要： A digital-to-analog converter of the type formed with a plurality of current source transistors arranged to carry different levels of current according to a predetermined weighting pattern, e.g., a binary weighting pattern. In the converter, a plurality of identically sized current source transistors carry the different levels of current and thus operate at different current densities with different base-to-emitter voltages subject to temperature drift. Stable emitter voltages, providing accurate levels of weighted current, are developed by means of resistances between the bases of successive current source transistors and a current source for developing across the interbase resistances a voltage linearly varying with absolute temperature, corresponding to the difference between base-to-emitter voltages of the successive current source transistors.The apparatus for generating a current linearly varying with absolute temperature is formed with first and second transistors forced to carry the same current at different current densities to produce different base-to-emitter voltages, and means such as an emitter resistor responsive to the difference in the base-to-emitter voltages for developing a current, corresponding to the difference in base-to-emitter voltages, which varies linearly with temperature.

摘要翻译： 一种数模转换器，其形成有多个电流源晶体管，其被布置为根据预定加权模式（例如二进制加权模式）传送不同电平的电流。 在转换器中，多个相同大小的电流源晶体管承载不同电平的电流，因此以不同的基极 - 发射极电压经受温度漂移的不同电流密度工作。 通过连续电流源晶体管的基极之间的电阻和用于在跨基准电阻之间形成的绝缘温度线性变化的电压的电流源开发稳定的发射极电压，提供精确的加权电流水平，对应于基极 - 连续电流源晶体管的发射极间电压。

公开(公告)号：US06563384B1

公开(公告)日：2003-05-13

申请号：US09642432

申请日：2000-08-21

申请人： Adrian Paul Brokaw

发明人： Adrian Paul Brokaw

IPC分类号： H03F345

CPC分类号： H03F3/45085 ,  H03F1/083 ,  H03F2203/45454 ,  H03F2203/45646 ,  H03F2203/45674

摘要： A high gain amplifier includes a differential amplifier stage having a pair of transistors; first and second input circuits for providing input signals to the pair of transistors; transistor means arranged as a differential-to-single-ended converter driven by the differential amplifier stage to provide a single ended output signal; an intermediate gain stage having an input responsive to the single ended output signal; bias means for the differential amplifier, the bias means including circuit means for maintaining the currents through the pair of transistors in constant ratio independently of changes in load at the intermediate gain stage; and an inverting gain output stage driven by the intermediate gain stage and having an output for driving a load substantially from rail to rail. Also disclosed is a frequency compensation capacitor circuit connected between the input of the intermediate gain stage and the output of the inverting gain output stage.

摘要翻译： 高增益放大器包括具有一对晶体管的差分放大器级; 用于向所述一对晶体管提供输入信号的第一和第二输入电路; 晶体管装置被布置为由差分放大器级驱动的差分到单端转换器，以提供单端输出信号; 具有响应于单端输出信号的输入的中间增益级; 用于差分放大器的偏置装置，偏置装置包括电路装置，用于独立于中间增益级的负载变化，保持恒定比例的一对晶体管的电流; 以及由中间增益级驱动并具有用于基本上从轨到轨驱动负载的输出的反相增益输出级。 还公开了连接在中间增益级的输入端和反相增益输出级的输出端之间的频率补偿电容器电路。

公开(公告)号：US06549070B1

公开(公告)日：2003-04-15

申请号：US09642964

申请日：2000-08-21

申请人： Chau C. Tran ,  Adrian Paul Brokaw

发明人： Chau C. Tran ,  Adrian Paul Brokaw

IPC分类号： H03F345

CPC分类号： H03F3/45085 ,  H03F1/52 ,  H03F2203/45371 ,  H03F2203/45454 ,  H03F2203/45594 ,  H03F2203/45674

摘要： A high gain amplifier includes an intermediate gain stage; an output gain stage driven by the intermediate gain stage; an input stage, for driving the intermediate gain stage, which is balanced between positive and negative feedback in normal operation; bias means for driving the input stage to maintain balance between positive and negative feedback in normal operation; and a resistance for limiting the output current of the intermediate stage in response to the input stage being overdriven into positive feedback.

摘要翻译： 高增益放大器包括中间增益级; 由中间增益级驱动的输出增益级; 用于驱动中间增益级的输入级，其在正常操作中的正反馈之间平衡; 用于驱动输入级以在正常操作中保持正反馈之间的平衡的偏置装置; 并且响应于输入级被过驱动到正反馈的限制中间级的输出电流的电阻。