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11. 发明授权

US07262665B1 Active bias circuit for low-noise amplifiers 有权
标题翻译：低噪声放大器的主动偏置电路
公开(公告)号：US07262665B1
公开(公告)日：2007-08-28
申请号：US11523423
申请日：2006-09-19
申请人： Xiaodong Jin , Shuran Wei
发明人： Xiaodong Jin , Shuran Wei
IPC分类号： H03G3/10
CPC分类号： H03F1/26 , H03F1/30 , H03F3/343 , H03F2200/294 , H03F2200/372 , H03F2200/504
摘要： A low-noise amplifier with a first amplification circuit that includes a control terminal, a first terminal, and a second terminal that communicates with a first reference voltage. An impedance load that communicates with the first terminal and a feedback circuit that comprises a current source that communicates with a second reference voltage. A comparator circuit that includes a first input, a second input and an output that communicates with the control terminal. A first impedance that communicates with the current source and the first input and that generates a predetermined reference voltage based on a reference current generated by the current source and a second impedance that communicates with the second input and the impedance load wherein the feedback circuit compares a voltage, based on an output current associated with the first terminal, with the reference voltage to generate a bias signal that is applied to the control terminal.
摘要翻译：一种具有第一放大电路的低噪声放大器，包括控制端子，第一端子和与第一参考电压连通的第二端子。与第一端子通信的阻抗负载和包括与第二参考电压通信的电流源的反馈电路。比较器电路，其包括与控制端子通信的第一输入端，第二输入端和输出端。第一阻抗，其与电流源和第一输入端通信，并且基于由电流源产生的参考电流产生预定参考电压，以及与第二输入和阻抗负载通信的第二阻抗，其中反馈电路将基于与第一端子相关联的输出电流的电压与参考电压产生施加到控制端子的偏置信号。

12. 发明申请

US20070194852A1 RADIO FREQUENCY POWER AMPLIFYING MODULE WITH HETERO JUNCTION BIPOLAR TRANSISTOR 有权
标题翻译：具有异质结双极晶体管的无线电频率功率放大模块
公开(公告)号：US20070194852A1
公开(公告)日：2007-08-23
申请号：US11618197
申请日：2006-12-29
申请人： Hirokazu Tsuromaki , Hiroyuki Nagai , Tomio Furuya , Yoshiaki Harasawa , Makoto Tabei
发明人： Hirokazu Tsuromaki , Hiroyuki Nagai , Tomio Furuya , Yoshiaki Harasawa , Makoto Tabei
IPC分类号： H03G3/10
CPC分类号： H03G3/3047 , H03F1/302 , H03F3/195 , H03F3/343 , H03F2200/447 , H03F2200/451
摘要： The present invention is directed to compensate electric properties of an RF power module depending on changes with time, temperature dependency, variations, and the like of grounded emitter current amplification factor of an HBT. A compound semiconductor integrated circuit supplies reference current of a reference HBT depending on hFE of an HBT to an input terminal of a first current mirror of a bias circuit of a silicon semiconductor integrated circuit. The base of an output HBT of the compound semiconductor integrated circuit is biased with bias current which increases in response to decrease in hFE of the HBT from an output of the first current mirror of the silicon semiconductor integrated circuit.
摘要翻译：本发明旨在根据HBT的接地发射极电流放大因子随时间，温度依赖性，变化等的变化来补偿RF功率模块的电性能。化合物半导体集成电路将HBT的hFE的参考电流提供给硅半导体集成电路的偏置电路的第一电流镜的输入端。化合物半导体集成电路的输出HBT的基极由偏置电流偏置，该偏置电流响应于HBT的hFE从硅半导体集成电路的第一电流镜的输出的减小而增加。

13. 发明申请

US20070182605A1 Fast converter for crossing voltage domains 有权
标题翻译：用于交叉电压域的快速转换器
公开(公告)号：US20070182605A1
公开(公告)日：2007-08-09
申请号：US11508966
申请日：2006-08-24
申请人： Jan Roelof Westra , Franciscus Maria Leonardus van der Goes , Erol Arslan
发明人： Jan Roelof Westra , Franciscus Maria Leonardus van der Goes , Erol Arslan
IPC分类号： H03M1/06
CPC分类号： H03F3/343
摘要： A voltage domain crossing circuit and method are disclosed. In one embodiment, the voltage domain crossing circuit comprises an AC coupling component, a DC biasing component and a high voltage output amplifier. The AC coupling component receives an input low voltage signal and AC couples and splits the signal into two voltages. The two voltages are then DC biased to a predetermined bias voltage using the DC biasing component. The high voltage output amplifier then amplifies the biased voltages in the high voltage domain yielding a signal in the high voltage domain. Other embodiments of the voltage domain crossing circuit and method are also disclosed.
摘要翻译：公开了一种电压域交叉电路和方法。在一个实施例中，电压域交叉电路包括AC耦合部件，DC偏置部件和高压输出放大器。 AC耦合组件接收输入低电压信号，并且AC将信号分离成两个电压。然后使用DC偏置组件将两个电压直流偏置到预定的偏置电压。然后，高电压输出放大器放大高电压域中的偏置电压，产生高电压域中的信号。还公开了电压域交叉电路和方法的其他实施例。

14. 发明授权

US07081787B2 Analog circuit for calculating square and reciprocal of a current 有权
标题翻译：用于计算电流的平方和倒数的模拟电路
公开(公告)号：US07081787B2
公开(公告)日：2006-07-25
申请号：US10949172
申请日：2004-09-24
申请人： Bingxue Shi , Jiwei Chen
发明人： Bingxue Shi , Jiwei Chen
IPC分类号： G05F1/10
CPC分类号： H03F3/343 , G06G7/20 , H03F3/347 , H03F3/45183 , H03F2203/45264 , H03F2203/45526
摘要： An analog circuit for calculating square and reciprocal of a current is provided. It is an analog integrated circuit and can make the input and output signals become currents in the current field of the same type of analog integrated circuit. The output current can be the square or reciprocal of the input current. The square and reciprocal functions can be implemented by using three identical BJTs. Those three BJTs are independent and the bases and collectors of the BJTs are coupled to ground. Hence, the circuit can be implemented by the standard CMOS and can be applied to the other complicated system. In addition, the operational amplifier and the capacitor in the circuit are required to stabilize this circuit. This circuit has a simple structure.
摘要翻译：提供了用于计算电流的平方和倒数的模拟电路。它是一个模拟集成电路，可以使输入和输出信号变成同一类型模拟集成电路电流的电流。输出电流可以是输入电流的平方或倒数。可以通过使用三个相同的BJT来实现平方和互逆函数。这三个BJT是独立的，BJT的基地和收集者被耦合到地面。因此，电路可以通过标准CMOS实现，可以应用于其他复杂的系统。此外，电路中的运算放大器和电容器需要稳定该电路。该电路结构简单。

15. 发明授权

US07072478B2 Microphone preamplifier 失效
公开(公告)号：US07072478B2
公开(公告)日：2006-07-04
申请号：US10254030
申请日：2002-09-24
申请人： Andres Hohendahl
发明人： Andres Hohendahl
IPC分类号： H03F21/00
CPC分类号： H03F3/343 , H03F1/22 , H03F13/00
摘要： A microphone preamplifier. An electrical signal from a microphone is received via a shielded cable by an input stage cascaded with an output stage. The input stage contains an impedance converter and a phase inverter and receives feedback that reduces input capacitance, actively shields the coaxial cable, and stabilizes the input stage. The output stage contains a buffer and output driver and provides amplified versions of the input stage output. The preamplifier contains means for transformerless phantom powering the microphone and the microphone preamplifier, for sharing current between the input and the output stages, and for limiting the frequency at the output of the microphone.

16. 发明申请

US20060006947A1 Current mirror biasing circuit with power control for HBT power amplifiers 失效
公开(公告)号：US20060006947A1
公开(公告)日：2006-01-12
申请号：US10888198
申请日：2004-07-09
申请人： Jeffrey Feng , David Caruth
发明人： Jeffrey Feng , David Caruth
IPC分类号： H03F3/04
CPC分类号： H03F3/343 , G05F3/265 , H03F1/302 , H03F3/3066
摘要： An electronic circuit includes a current mirror bias circuit and a power amplifier that has a power transistor for amplifying radio frequency signals such that the output collector current of the power transistor is approximately constant over a wide range of varying power supply voltages. The power transistor is biased by a current mirror biasing circuit that has a reference voltage that maintains the quiescent DC collector current at an approximately constant value. The reference voltage may be varied to provide control of the output power of the power amplifier.

17. 发明申请

US20050248329A1 Current voltage converter circuit 有权
标题翻译：电流电压转换电路
公开(公告)号：US20050248329A1
公开(公告)日：2005-11-10
申请号：US11118347
申请日：2005-05-02
申请人： Yukio Sato , Moriyasu Ichino
发明人： Yukio Sato , Moriyasu Ichino
IPC分类号： G11B7/125 , H01S3/13 , H02M3/24 , H03F3/08
CPC分类号： H03F3/08 , G11B7/126 , H03F3/343 , H03G1/0088 , H03G3/3084
摘要： A current voltage converter circuit includes a light receiving element which receives a light output from a laser and generates a light current according to the light output, a current distributor circuit which distributes the light current from the light receiving element, the current distributor circuit being configured of a current mirror circuit which includes a transistor pair and a first operating amplifier. The current voltage converter circuit further includes a voltage converter circuit which converts a current distributed by the current distributor circuit into a voltage, the voltage converter circuit including a second operating amplifier.
摘要翻译：电流电压转换器电路包括接收来自激光器的光输出并根据光输出产生光电流的光接收元件，分配来自光接收元件的光电流的分流器电路，配置电流分配器电路包括晶体管对和第一运算放大器的电流镜电路。当前的电压转换器电路还包括电压转换器电路，其将由分配器电路分配的电流转换成电压，该电压转换器电路包括第二运算放大器。

18. 发明申请

US20050062542A1 Fast-response current limiting 有权
公开(公告)号：US20050062542A1
公开(公告)日：2005-03-24
申请号：US10979549
申请日：2004-11-01
申请人： Roy Hastings , Lemuel Thompson
发明人： Roy Hastings , Lemuel Thompson
IPC分类号： H02H7/20 , H03F1/52 , H03F3/04 , H03F3/343
CPC分类号： H03F1/52 , H03F3/343
摘要： An amplifier (10″) has a first amplifier stage (14) for producing a control current (IX) in response to an input voltage. A second amplifier stage (16) has first (46) and second (38) transistors. The first transistor (46) is coupled to receive the control current (IX) and is operable to produce a control voltage. The second transistor (38) is coupled to receive the control voltage and operable to produce an output current. A nonlinear resistive element (50) is coupled to the first transistor (46) to add a nonlinear function of the control current (IX) to the control voltage. The nonlinear resistive element (50) may include a third transistor connected between the first transistor (46) and a reference potential, operable to receive the control current (IX) and to generate the nonlinear function thereof.

19. 发明申请

US20050052244A1 FAST-RESPONSE CURRENT LIMITING 有权
标题翻译：快速响应电流限制
公开(公告)号：US20050052244A1
公开(公告)日：2005-03-10
申请号：US10605118
申请日：2003-09-09
申请人： Roy Hastings , Lemuel Thompson
发明人： Roy Hastings , Lemuel Thompson
IPC分类号： H02H7/20 , H03F1/52 , H03F3/04 , H03F3/343
CPC分类号： H03F1/52 , H03F3/343
摘要： An amplifier (10″) has a first amplifier stage (14) for producing a control current (IX) in response to an input voltage. A second amplifier stage (16) has first (46) and second (38) transistors. The first transistor (46) is coupled to receive the control current (IX) and is operable to produce a control voltage. The second transistor (38) is coupled to receive the control voltage and operable to produce an output current. A nonlinear resistive element (50) is coupled to the first transistor (46) to add a nonlinear function of the control current (IX) to the control voltage. The nonlinear resistive element (50) may include a third transistor connected between the first transistor (46) and a reference potential, operable to receive the control current (IX) and to generate the nonlinear function thereof.
摘要翻译：放大器（10“）具有用于响应于输入电压产生控制电流（IX）的第一放大器级（14）。第二放大器级（16）具有第一（46）和第二（38）晶体管。第一晶体管（46）被耦合以接收控制电流（IX）并且可操作以产生控制电压。第二晶体管（38）被耦合以接收控制电压并且可操作以产生输出电流。非线性电阻元件（50）耦合到第一晶体管（46），以将控制电流（IX）的非线性函数加到控制电压上。非线性电阻元件（50）可以包括连接在第一晶体管（46）和参考电位之间的第三晶体管，可操作以接收控制电流（IX）并产生其非线性函数。

20. 发明申请

US20050024146A1 High speed high gain amplifier 审中-公开
标题翻译：高速高增益放大器
公开(公告)号：US20050024146A1
公开(公告)日：2005-02-03
申请号：US10932687
申请日：2004-09-01
申请人： Andrew Mallinson
发明人： Andrew Mallinson
IPC分类号： H03F3/343 , H03F3/68
CPC分类号： H03F3/343 , H03F2200/453
摘要： An electronic device is provided such as an amplifier, for example, having improved gain and transconductance and low output impedance. The device includes a primary amplifier configured to carry an operating load. The primary amplifier includes an input for receiving an input signal, and an output for outputting an output signal, and operates having a variable output, as it carries an operational load. The device further includes a secondary amplifier configured to operate at a fixed operating condition, not burdened by carrying an operational load, and includes a secondary input configured to receive the input signal, wherein the secondary amplifier is configured to define the input voltage. The device is configured to detect a difference in operating current between the primary and secondary amplifiers, and to compensate for any operational load that may be applied to the primary amplifier during operation.
摘要翻译：提供了诸如具有改善的增益和跨导和低输出阻抗的放大器的电子器件。该装置包括被配置为承载操作负载的主放大器。主放大器包括用于接收输入信号的输入端和用于输出输出信号的输出，并在其承载操作负载时具有可变输出。该装置还包括辅助放大器，其被配置为在固定的工作状态下操作，而不承受运行负载的负担，并且包括被配置为接收输入信号的次级输入，其中辅助放大器被配置为限定输入电压。该器件被配置为检测主放大器和次放大器之间的工作电流的差异，并且补偿在操作期间可能施加到初级放大器的任何工作负载。

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