公开(公告)号：US07532065B2

公开(公告)日：2009-05-12

申请号：US11420177

申请日：2006-05-24

Applicant: Jinghong Chen ,  Gregory W. Sheets ,  Joseph Anidjar ,  Robert J. Kapuschinsky ,  Lane A. Smith

Inventor： Jinghong Chen ,  Gregory W. Sheets ,  Joseph Anidjar ,  Robert J. Kapuschinsky ,  Lane A. Smith

IPC: H03F1/02

CPC classification number: H03F3/45973 ,  H03F3/45977 ,  H03F2203/45101 ,  H03F2203/45434 ,  H03F2203/45564 ,  H03F2203/45588 ,  H03F2203/45622

Abstract: An amplifier having DC offset compensation includes at least one input node and a pair of differential output nodes, a biasing circuit coupled to the input node; and a plurality of current sources. Selected ones of said current sources are coupled to the input node to adjust a DC voltage at the input node to provide DC offset compensation for the amplifier

Abstract translation: 具有DC偏移补偿的放大器包括至少一个输入节点和一对差分输出节点，偏置电路耦合到输入节点; 和多个电流源。 所选择的所述电流源耦合到输入节点以调整输入节点处的DC电压，以为放大器提供DC偏移补偿

公开(公告)号：US07382189B2

公开(公告)日：2008-06-03

申请号：US11526855

申请日：2006-09-25

Applicant: Jinghong Chen ,  Shaorui Li ,  Lawrence A. Rigge

Inventor： Jinghong Chen ,  Shaorui Li ,  Lawrence A. Rigge

IPC: H03F3/45

CPC classification number: H03F3/45188 ,  H03F1/56 ,  H03F3/19 ,  H03F2200/222 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45316 ,  H03F2203/45332 ,  H03F2203/45506 ,  H03F2203/45616 ,  H03F2203/45704 ,  H03F2203/45726 ,  H03H7/38

Abstract: In one embodiment, an amplifier circuit has at least one branch and current-source circuitry providing a tail current to the branch, which has at least one load tank, at least one input transistor coupled to the load tank, and variable-impedance circuitry coupled between an input node of the amplifier circuit and the gate of the input transistor. The transconductance of the input transistor can be altered to achieve two or more different gain settings for the amplifier circuit. The variable-impedance circuitry can be controlled to contribute any one of at least two different levels of impedance to the overall input impedance of the amplifier circuit. If the transconductance of the input transistor is reduced, then the variable-impedance circuitry can increase the level of impedance contributed to the overall input impedance of the amplifier circuit such that the overall input impedance of the amplifier circuit remains substantially unchanged.

Abstract translation: 在一个实施例中，放大器电路具有至少一个分支和电流源电路，其向分支提供尾电流，该分支具有至少一个负载箱，耦合到负载箱的至少一个输入晶体管和耦合到可变阻抗电路 在放大器电路的输入节点和输入晶体管的栅极之间。 可以改变输入晶体管的跨导以实现放大器电路的两个或多个不同的增益设置。 可控制可变阻抗电路可以对放大器电路的整个输入阻抗提供至少两个不同等级的阻抗中的任何一个。 如果输入晶体管的跨导减小，则可变阻抗电路可以增加对放大器电路的总体输入阻抗贡献的阻抗水平，使得放大器电路的总体输入阻抗基本上保持不变。

公开(公告)号：US07342462B1

公开(公告)日：2008-03-11

申请号：US11462180

申请日：2006-08-03

Applicant: Jinghong Chen

Inventor： Jinghong Chen

IPC: H03B5/12 ,  H03B27/00 ,  H03L7/24

CPC classification number: H03L7/00 ,  H03B27/00 ,  H03L7/099

Abstract: A voltage controlled oscillator unit is provided with cross coupled voltage controlled oscillators to generate quadrature phases. One control stage adjusts coupling between the oscillators. Another control stage adjusts the tail current that applies operating bias to the oscillators and to the couplers, respectively. The cross coupling and tail current control stages are arranged so that tuning one simultaneously and oppositely tunes the other for simultaneous adjustment in opposite directions. This limits the power consumption of the oscillator unit throughout the range of frequency control.

Abstract translation: 压控振荡器单元设有交叉耦合电压控制振荡器以产生正交相位。 一个控制级调节振荡器之间的耦合。 另一个控制级分别调节向振荡器和耦合器施加工作偏压的尾电流。 交叉耦合和尾电流控制级被布置成使得调谐一个同时并相反地调谐另一个以在相反方向上同时进行调整。 这限制了整个频率控制范围内振荡器单元的功耗。

公开(公告)号：US20070120603A1

公开(公告)日：2007-05-31

申请号：US11673264

申请日：2007-02-09

Applicant: Tienyu Chang ,  Jinghong Chen

Inventor： Tienyu Chang ,  Jinghong Chen

IPC: H03F3/45

CPC classification number: H03F3/45188 ,  H03F1/08 ,  H03F1/26 ,  H03F1/42 ,  H03F3/45179 ,  H03F2200/294 ,  H03F2200/36 ,  H03F2200/372 ,  H03F2203/45481 ,  H03F2203/45526 ,  H03F2203/45532 ,  H03F2203/45554

Abstract: A wideband amplifier having an amplifier input terminal and an amplifier output terminal includes at least one transistor coupled to the amplifier input terminal and an impedance element coupled between the amplifier input terminal and the amplifier output terminal. A feedback signal is transmitted between the amplifier output terminal and the amplifier input terminal by way of the impedance element wherein the feedback signal varies in accordance with changes in an impedance of the impedance element so as to peak a frequency response of the amplifier.

Abstract translation: 具有放大器输入端子和放大器输出端子的宽带放大器包括耦合到放大器输入端子的至少一个晶体管和耦合在放大器输入端子和放大器输出端子之间的阻抗元件。 反馈信号通过阻抗元件在放大器输出端和放大器输入端之间传输，其中反馈信号根据阻抗元件的阻抗变化而变化，从而使放大器的频率响应达到峰值。

公开(公告)号：US11061019B2

公开(公告)日：2021-07-13

申请号：US16009187

申请日：2018-06-14

Applicant: Jinghong Chen

Inventor： Jinghong Chen

IPC: G01N33/52 ,  G01J3/10 ,  G01J3/28 ,  G01N21/31 ,  G01N21/64

Abstract: A high sensitivity optical system for detection of chemical and biological analytes is disclosed comprising a vessel containing the chemical and biological analytes, a light-guide inside the vessel but separated from the vessel by the chemical and biological analytes, one or more excitation light sources at one end of the vessel, a detector at another end of the vessel, one or more excitation filters between the excitation light sources and the vessel, one or more emission filters between the vessel and the detector, and light directing components. The novel optical system is secured in a housing and connected to devices extrinsically or intrinsically for data input, process, display, storage, and communication. This optical system could enable clinical level diagnosis of a wide range of diseases in an inexpensive mobile point-of-care format. Furthermore, the form factor of the optical system can be significantly reduced to form a highly integrated lab-on-a-chip system.

公开(公告)号：US20200264167A1

公开(公告)日：2020-08-20

申请号：US16009187

申请日：2018-06-14

Applicant: Jinghong Chen

Inventor： Jinghong Chen

IPC: G01N33/52 ,  G01N21/64 ,  G01J3/28 ,  G01N21/31 ,  G01J3/10

Abstract: A high sensitivity optical system for detection of chemical and biological analytes is disclosed comprising a vessel, a light-guide, analytes, excitation light source(s), a detector, excitation and emission filter(s), and light directing components. The novel optical system is secured in housing and connected to devices extrinsically or intrinsically for data input, process, display, storage, and communication. This optical system could enable clinical level diagnosis of a wide range of diseases in an inexpensive mobile point-of-care format. It can be a stand alone unit with single or an array of optical structures, or used in combination with other detection systems such as mobile microscope to form a qualitative and quantitative detection apparatus. It can also be implemented in some commercial instruments to improve sensitivities. Furthermore, the form factor of the optical system can be significantly reduced to form a highly integrated lab-on-a-chip solution.

公开(公告)号：US10020896B2

公开(公告)日：2018-07-10

申请号：US15871246

申请日：2018-01-15

Applicant: Jinghong Chen

Inventor： Jinghong Chen ,  Xiangning Chen ,  Jingzhun Feng

IPC: G10L19/00 ,  H04B11/00 ,  G10L21/00

CPC classification number: H04B11/00

Abstract: It discloses an acoustic channel-based data communications method which performs channel coding on an original data signal using a CRC coding method and a BCH coding method to obtain a coded sequence; modulates the coded sequence using a preset audio sequence symbol set via a symbol mapping method to obtain a digital audio signal; selects a channel frequency band according to characteristics of a transmitting equipment and interference between frequency bands; and converts the digital audio signal into an analog audio signal through a digital-to-analog converter and transmits the signal to a channel for transmission according to the selected channel frequency band.

公开(公告)号：US09941978B2

公开(公告)日：2018-04-10

申请号：US14859342

申请日：2015-09-20

Applicant: Jinghong Chen

Inventor： Jinghong Chen ,  Xiangning Chen ,  Jingzhun Feng

IPC: G10L19/00 ,  H04B11/00 ,  G10L21/00

CPC classification number: H04B11/00

Abstract: It discloses an acoustic channel-based data communications method which performs channel coding on an original data signal using a CRC coding method and a BCH coding method to obtain a coded sequence; modulates the coded sequence using a preset audio sequence symbol set via a symbol mapping method to obtain a digital audio signal; selects a channel frequency band according to characteristics of a transmitting equipment and interference between frequency bands; and converts the digital audio signal into an analog audio signal through a digital-to-analog converter and transmits the signal to a channel for transmission according to the selected channel frequency band.

公开(公告)号：US20150139343A1

公开(公告)日：2015-05-21

申请号：US14599573

申请日：2015-01-19

Applicant: Jinghong Chen

Inventor： Jinghong Chen ,  Xiangning Chen ,  Jingzhun Feng

IPC: H04L27/26

CPC classification number: H04L27/2666 ,  H04B11/00 ,  H04L27/2602 ,  H04L27/2634 ,  H04L27/265 ,  H04L27/2655 ,  H04L27/2656 ,  H04L27/2662 ,  H04L27/2675

Abstract: Disclosed is an orthogonal frequency division multiplexing (OFDM)-based acoustic communications system. At an acoustic transmitting end, original data is modulated through channel coding into an acoustic signal of a data frame formed by multiple OFDM symbols and the acoustic signal is transmitted through a loudspeaker; at an acoustic receiving end, after a microphone receives the acoustic signal, and the acoustic signal is restored to the original data through demodulation and channel decoding. In a communication process, symbol synchronization is implemented through pilot information, and data frame synchronization is implemented in a manner of inserting baker codes, thereby simplifying processing, having a low bit error rate, improving acoustic communication efficiency, promoting development of acoustic communication, and having a good application prospect.

公开(公告)号：US20090085642A1

公开(公告)日：2009-04-02

申请号：US11865368

申请日：2007-10-01

Applicant: Shaorui LI ,  Jinghong Chen ,  Lawrence Rigge

Inventor： Shaorui LI ,  Jinghong Chen ,  Lawrence Rigge

IPC: G06G7/12

CPC classification number: H03F3/45197 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03F2203/45488

Abstract: A passive mixer includes a transconductance amplifier having a source degeneration capacitance. The transconductance amplifier has an input for receiving an input signal and an output for outputting a current signal. A multiplier is provided for mixing a local oscillator signal with the current signal so as to provide an output signal at an output of the passive mixer. A capacitive load is connected to the output of the passive mixer.

Abstract translation: 无源混频器包括具有源极退化电容的跨导放大器。 跨导放大器具有用于接收输入信号的输入和用于输出电流信号的输出。 提供了一个乘法器，用于将本地振荡器信号与当前信号混频，以便在无源混频器的输出处提供输出信号。 电容负载连接到无源混频器的输出端。