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1. 发明授权

US07239199B1 Amplifier calibration 有权
标题翻译：放大器校准
公开(公告)号：US07239199B1
公开(公告)日：2007-07-03
申请号：US10825781
申请日：2004-04-16
申请人： George Chien , Donghong Cui , King Chun Tsai , Yungping Hsu , Hsiao-Cheng Tang , Yonghua Song
发明人： George Chien , Donghong Cui , King Chun Tsai , Yungping Hsu , Hsiao-Cheng Tang , Yonghua Song
IPC分类号： H03F1/02
CPC分类号： H03F3/45085 , H03F3/45596 , H03F2203/45048 , H03F2203/45072 , H03F2203/45212 , H03F2203/45354 , H03F2203/45356 , H03F2203/45372 , H03F2203/45682
摘要： Apparatus, systems, and methods implementing techniques for reducing the variation of a DC offset are described. An input signal is amplified to produce an intermediate signal. The intermediate signal is processed to produce a feedback signal and an output signal, where the output signal has a DC offset that varies with a varying parameter of the circuitry used to process the intermediate signal. Variation of the DC offset of the output signal is reduced using the feedback signal. In one implementation, the circuitry used to process the intermediate signal is a variable-gain amplifier circuit, and the DC offset of the output signal varies with a gain of the variable-gain amplifier.
摘要翻译：描述了实现用于减小DC偏移的变化的技术的装置，系统和方法。输入信号被放大以产生中间信号。处理中间信号以产生反馈信号和输出信号，其中输出信号具有随着用于处理中间信号的电路的变化参数而变化的DC偏移。使用反馈信号减小输出信号的直流偏移的变化。在一个实现中，用于处理中间信号的电路是可变增益放大器电路，并且输出信号的DC偏移随可变增益放大器的增益而变化。

2. 发明授权

US07459975B1 Baseband filter start-up circuit 有权
标题翻译：基带滤波器启动电路
公开(公告)号：US07459975B1
公开(公告)日：2008-12-02
申请号：US11699648
申请日：2007-01-30
申请人： Donghong Cui , Yonghua Song
发明人： Donghong Cui , Yonghua Song
IPC分类号： H03F3/45
CPC分类号： H03F3/45094 , H03F1/34 , H03F3/45475 , H03F3/72 , H03F2203/45521
摘要： An amplifier comprises an input circuit that receives an input to the amplifier. A start-up circuit communicates with the input circuit, generates a start-up signal, and turns off the start-up signal when an output of the amplifier reaches a threshold voltage. The start-up circuit includes a first transistor having first and second terminals and a base terminal and a second transistor having first and second terminals and a base terminal. The base terminals of the first and second transistors receive a bias input, the first terminals of the first and second transistors communicate with each other and with a first current source, and the second terminals of the first and second transistors communicate with the input circuit.
摘要翻译：放大器包括接收到放大器的输入的输入电路。启动电路与输入电路通信，产生启动信号，并且当放大器的输出达到阈值电压时关断启动信号。启动电路包括具有第一和第二端子的第一晶体管和基极端子以及具有第一和第二端子和基极端子的第二晶体管。第一晶体管和第二晶体管的基极端子接收偏置输入，第一和第二晶体管的第一端子彼此连通并与第一电流源通信，第一和第二晶体管的第二端与输入电路连通。

3. 发明授权

US07528657B1 Baseband filter start-up circuit 有权
标题翻译：基带滤波器启动电路
公开(公告)号：US07528657B1
公开(公告)日：2009-05-05
申请号：US11699890
申请日：2007-01-30
申请人： Donghong Cui , Yonghua Song
发明人： Donghong Cui , Yonghua Song
IPC分类号： H03F3/45
CPC分类号： H03F3/45094 , H03F1/34 , H03F3/45475 , H03F3/72 , H03F2203/45521
摘要： An electrical circuit comprises a plurality of amplifiers. Each of the plurality of amplifiers comprises an input circuit in communication with an input of the amplifier and a start-up circuit in communication with the input circuit. The start-up circuit is configured to generate a start-up signal to enable subsequent operation of the amplifier. An output circuit communicates with an output of the amplifier and with the input circuit and the start-up circuit. Respective inputs of a first and a second amplifier of the plurality of amplifiers are in communication with outputs of a third amplifier of the plurality of amplifiers. Outputs of the second amplifier are in communication with inputs of the third amplifier.
摘要翻译：电路包括多个放大器。多个放大器中的每一个包括与放大器的输入通信的输入电路和与输入电路通信的启动电路。启动电路被配置为产生启动信号以使能放大器的后续操作。输出电路与放大器的输出以及输入电路和启动电路进行通信。多个放大器的第一和第二放大器的相应输入端与多个放大器的第三放大器的输出端相通。第二放大器的输出与第三放大器的输入端通信。

4. 发明授权

US07808317B1 Baseband filter start-up circuit 有权
标题翻译：基带滤波器启动电路
公开(公告)号：US07808317B1
公开(公告)日：2010-10-05
申请号：US12430305
申请日：2009-04-27
申请人： Donghong Cui , Yonghua Song
发明人： Donghong Cui , Yonghua Song
IPC分类号： H03F3/45
CPC分类号： H03F3/45094 , H03F1/34 , H03F3/45475 , H03F3/72 , H03F2203/45521
摘要： An electrical circuit includes an amplifier. The amplifier includes an input circuit in communication with an input of the amplifier. A start-up circuit is in communication with the input circuit. The start-up circuit is configured to generate a start-up signal to enable subsequent operation of the amplifier. The start-up circuit turns off when an output of the amplifier reaches a threshold voltage. An output circuit is in communication with each of the outputs of the amplifier, the input circuit, and the start-up circuit.
摘要翻译：电路包括放大器。放大器包括与放大器的输入通信的输入电路。启动电路与输入电路通信。启动电路被配置为产生启动信号以使能放大器的后续操作。当放大器的输出达到阈值电压时，启动电路关闭。输出电路与放大器，输入电路和启动电路的每个输出端连通。

5. 发明授权

US07180369B1 Baseband filter start-up circuit 有权
标题翻译：基带滤波器启动电路
公开(公告)号：US07180369B1
公开(公告)日：2007-02-20
申请号：US10759173
申请日：2004-01-20
申请人： Donghong Cui , Yonghua Song
发明人： Donghong Cui , Yonghua Song
IPC分类号： H03F3/45
CPC分类号： H03F3/45094 , H03F1/34 , H03F3/45475 , H03F3/72 , H03F2203/45521
摘要： An electrical circuit includes an amplifier. The amplifier includes an input circuit in communication with an input of the amplifier. The amplifier includes a start-up circuit in communication with the input circuit. The start-up circuit is configured to generate a start-up signal to enable subsequent operation of the amplifier. Generation of the start-up signal by the start-up circuit can be ceased when the operation of the amplifier reaches a steady-state. The amplifier also includes an output circuit in communication with an output of the amplifier and in communication with the input circuit and the start-up circuit.
摘要翻译：一个电路包括放大器。放大器包括与放大器的输入通信的输入电路。放大器包括与输入电路通信的启动电路。启动电路被配置为产生启动信号以使能放大器的后续操作。当放大器的工作达到稳态时，起动电路产生启动信号可以停止。放大器还包括与放大器的输出通信并与输入电路和启动电路通信的输出电路。

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