公开(公告)号：US07990216B2

公开(公告)日：2011-08-02

申请号：US12474021

申请日：2009-05-28

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H03F3/45

CPC classification number: H03F3/45188 ,  H03F3/195 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45384 ,  H03F2203/45386 ,  H03F2203/45392 ,  H03F2203/45544 ,  H03F2203/45548 ,  H03F2203/45554 ,  H03F2203/45596 ,  H03F2203/45638 ,  H04B1/18

Abstract: Cross-coupled low noise amplifier for cellular applications. A circuitry implementation that includes two pairs of metal oxide semiconductor field-effect transistors (MOSFETs) (either N-type of P-type) operates as an LNA, which can be used within any of a wide variety of communication devices. In one embodiment, this design is particularly adaptable to cellular telephone applications. A majority of the elements are integrated within the design and need not be implemented off-chip, and this can provide for a reduction in area required by the circuitry. A very high output impedance is provided by using two transistors (implemented in a triple well configuration) with resistive source degeneration. A higher than typical power supply voltage can be employed (if desired) to accommodate the voltage drops of the resistors and transistors.

Abstract translation: 用于蜂窝应用的交叉耦合低噪声放大器。 包括两对金属氧化物半导体场效应晶体管（MOSFET）（N型P型）的电路实现作为LNA工作，可以在各种通信设备中使用。 在一个实施例中，该设计特别适用于蜂窝电话应用。 大多数元件集成在设计中，不需要在片外实现，这可以减少电路所需的面积。 通过使用具有电阻源退化的两个晶体管（以三阱配置实现）来提供非常高的输出阻抗。 可以使用高于典型的电源电压（如果需要）以适应电阻器和晶体管的电压降。

公开(公告)号：US20110143822A1

公开(公告)日：2011-06-16

申请号：US13033289

申请日：2011-02-23

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H04W88/02

CPC classification number: H03F3/195 ,  H03F3/45188 ,  H03F2203/45316 ,  H03F2203/45384 ,  H03F2203/45392 ,  H03F2203/45481 ,  H03F2203/45638

Abstract: Fully integrated compact cross-coupled low noise amplifier. A circuitry implementation that includes two pairs of metal oxide semiconductor field-effect transistors (MOSFETs) (either N-type of P-type) operates as an LNA, which can be used within any of a wide variety of communication devices. A majority of the elements are integrated within the design and need not be implemented off-chip, and this can provide for a reduction in area required by the circuitry. A differential 100Ω input impedance is provided by this design. A higher than typical power supply voltage can be employed (if desired) to accommodate one possible implementation that includes two parallel implemented resistors to ground.

Abstract translation: 全集成紧凑型交叉耦合低噪声放大器。 包括两对金属氧化物半导体场效应晶体管（MOSFET）（N型P型）的电路实现作为LNA工作，可以在各种通信设备中使用。 大多数元件集成在设计中，不需要在片外实现，这可以减少电路所需的面积。 差分100＆OHgr; 输入阻抗由本设计提供。 可以采用高于典型的电源电压（如果需要）以适应包括两个并联实现的接地电阻的一种可能的实现。

公开(公告)号：US07679431B2

公开(公告)日：2010-03-16

申请号：US11944715

申请日：2007-11-26

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H03B1/00 ,  H03K5/00 ,  H04B1/10

CPC classification number: G06G7/16 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D2200/0084

Abstract: Low flicker noise mixer and buffer. This design employs some native metal oxide semiconductor field-effect transistors (MOSFETs) (e.g., having no threshold voltage) within a passive mixer whose gates are driven using clock signals. These native MOSFETs maybe biased at one half of the power supply voltage to provide a lower noise figure. A cooperatively operating buffer employs appropriately places MOSFETs and resistors to ensure the desired gain. Relatively larger valued resistors can be employed to provide for higher voltage gain, and this can sometimes be accompanied with using a higher than typical power supply voltage. Source followers serve as output buffers and also ensure the required output DC voltage level as well. It is also noted that this design can be implemented using n-channel metal oxide semiconductor field-effect transistors (N-MOSFETs) of p-channel metal oxide semiconductor field-effect transistors (P-MOSFETs).

Abstract translation: 低闪烁噪声混频器和缓冲器。 该设计在无源混频器内采用一些本征金属氧化物半导体场效应晶体管（MOSFET）（例如，不具有阈值电压），其门的栅极使用时钟信号驱动。 这些原生MOSFET可能偏置在电源电压的一半处，以提供较低的噪声系数。 合作运行的缓冲器适当地放置MOSFET和电阻器以确保期望的增益。 可以采用相对较大值的电阻器来提供更高的电压增益，并且有时可以伴随使用高于典型的电源电压。 源跟随器用作输出缓冲器，并且还确保所需的输出直流电压电平。 还应注意，该设计可以使用p沟道金属氧化物半导体场效应晶体管（P-MOSFET）的n沟道金属氧化物半导体场效应晶体管（N-MOSFET）来实现。

公开(公告)号：US20090102562A1

公开(公告)日：2009-04-23

申请号：US11874305

申请日：2007-10-18

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H03F3/16 ,  H03F3/45

CPC classification number: H03F3/45188 ,  H03F3/195 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45384 ,  H03F2203/45386 ,  H03F2203/45392 ,  H03F2203/45544 ,  H03F2203/45548 ,  H03F2203/45554 ,  H03F2203/45596 ,  H03F2203/45638 ,  H04B1/18

Abstract: Cross-coupled low noise amplifier for cellular applications. A circuitry implementation that includes two pairs of metal oxide semiconductor field-effect transistors (MOSFETs) (either N-type of P-type) operates as an LNA, which can be used within any of a wide variety of communication devices. In one embodiment, this design is particularly adaptable to cellular telephone applications. A majority of the elements are integrated within the design and need not be implemented off-chip, and this can provide for a reduction in area required by the circuitry. A very high output impedance is provided by using two transistors (implemented in a triple well configuration) with resistive source degeneration. A higher than typical power supply voltage can be employed (if desired) to accommodate the voltage drops of the resistors and transistors.

Abstract translation: 用于蜂窝应用的交叉耦合低噪声放大器。 包括两对金属氧化物半导体场效应晶体管（MOSFET）（N型P型）的电路实现作为LNA工作，可以在各种通信设备中使用。 在一个实施例中，该设计特别适用于蜂窝电话应用。 大多数元件集成在设计中，不需要在片外实现，这可以减少电路所需的面积。 通过使用具有电阻源退化的两个晶体管（以三阱配置实现）来提供非常高的输出阻抗。 可以使用高于典型的电源电压（如果需要）以适应电阻器和晶体管的电压降。

公开(公告)号：US07224225B2

公开(公告)日：2007-05-29

申请号：US11115698

申请日：2005-04-26

Applicant: Yuyu Chang

Inventor： Yuyu Chang

IPC: H03F3/45

CPC classification number: H03F3/193 ,  H03F3/45188 ,  H03F2200/294 ,  H03F2203/45386 ,  H03F2203/45621 ,  H03F2203/45731

Abstract: An embodiment of the present invention is a low noise amplifier using differential inductors. An input matching circuit having first and second differential inductors matches an input resistance at an input having input terminals. A differential amplifier circuit converts the input voltage a current. An output circuit provides an output voltage buffer with a low output impedance at an output having output terminals. A cascode circuit increases isolation between the input and the output terminals.

Abstract translation: 本发明的一个实施例是使用差分电感器的低噪声放大器。 具有第一和第二差分电感器的输入匹配电路匹配具有输入端的输入端的输入电阻。 差分放大器电路将输入电压转换为电流。 输出电路在具有输出端的输出端提供具有低输出阻抗的输出电压缓冲器。 共源共栅电路增加了输入端和输出端之间的隔离度。

公开(公告)号：US20060238248A1

公开(公告)日：2006-10-26

申请号：US11115698

申请日：2005-04-26

Applicant: Yuyu Chang

Inventor： Yuyu Chang

IPC: H03F3/45

CPC classification number: H03F3/193 ,  H03F3/45188 ,  H03F2200/294 ,  H03F2203/45386 ,  H03F2203/45621 ,  H03F2203/45731

Abstract: An embodiment of the present invention is a low noise amplifier using differential inductors. An input matching circuit having first and second differential inductors matches an input resistance at an input having input terminals. A differential amplifier circuit converts the input voltage a current. An output circuit provides an output voltage buffer with a low output impedance at an output having output terminals. A cascode circuit increases isolation between the input and the output terminals.

Abstract translation: 本发明的一个实施例是使用差分电感器的低噪声放大器。 具有第一和第二差分电感器的输入匹配电路匹配具有输入端的输入端的输入电阻。 差分放大器电路将输入电压转换为电流。 输出电路在具有输出端的输出端提供具有低输出阻抗的输出电压缓冲器。 共源共栅电路增加了输入端和输出端之间的隔离度。

公开(公告)号：US09112508B2

公开(公告)日：2015-08-18

申请号：US12802604

申请日：2010-06-09

Applicant: Yuyu Chang ,  Ahmad Yazdi ,  Hooman Darabi

Inventor： Yuyu Chang ,  Ahmad Yazdi ,  Hooman Darabi

IPC: H03L1/00

CPC classification number: H03L1/00

Abstract: According to one embodiment, a radio frequency (RF) transceiver includes a local oscillator generator (LOGEN) circuit configured to receive an adaptive supply voltage. The LOGEN circuit is coupled to a variable power supply for providing the adaptive supply voltage. A process monitor for the LOGEN circuit is in communication with the variable power supply through a power supply programming module. As a result, the adaptive supply voltage can be adjusted according to data supplied by the process monitor. A method for adaptively powering a LOGEN circuit comprises providing power to an RF device, monitoring a process corner of said LOGEN circuit, determining a supply voltage corresponding to the process corner, and adjusting the supply voltage to adaptively power the LOGEN circuit.

Abstract translation: 根据一个实施例，射频（RF）收发器包括被配置为接收自适应电源电压的本地振荡器发生器（LOGEN）电路。 LOGEN电路耦合到可变电源以提供自适应电源电压。 LOGEN电路的过程监控器通过电源编程模块与可变电源通信。 因此，可以根据过程监视器提供的数据来调节自适应电源电压。 一种用于自适应地为LOGEN电路供电的方法包括向RF设备提供电力，监测所述LOGEN电路的过程角，确定对应于过程角的电源电压，以及调整电源电压以自适应地为LOGEN电路供电。

公开(公告)号：US08204468B2

公开(公告)日：2012-06-19

申请号：US12496325

申请日：2009-07-01

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H04B1/26

CPC classification number: G05F3/242

Abstract: Embodiments of the present invention provide DC biasing circuits. Embodiments employ an open loop scheme, instead of a closed loop scheme as used in conventional circuits. In addition, embodiments generate a DC bias voltage that is independent of temperature, process, and power supply variations. Further, embodiments require low amounts of power and silicon.

Abstract translation: 本发明的实施例提供直流偏置电路。 实施例采用开环方案，而不是常规电路中使用的闭环方案。 此外，实施例产生独立于温度，过程和电源变化的DC偏置电压。 此外，实施例需要少量的功率和硅。

公开(公告)号：US08183905B2

公开(公告)日：2012-05-22

申请号：US12539495

申请日：2009-08-11

Applicant: Yuyu Chang ,  Qiang Li ,  John Leete ,  Hooman Darabi ,  Yiannis Kokolakis

Inventor： Yuyu Chang ,  Qiang Li ,  John Leete ,  Hooman Darabi ,  Yiannis Kokolakis

IPC: G06F1/04 ,  H03K3/00

CPC classification number: H03L1/00 ,  H03B5/368

Abstract: A method to provide a low-power clock signal or a low-noise clock signal is described herein. It is determined whether a low-power mode or a low-noise mode is in use. A voltage reference input of a low-dropout voltage regulator (LDO) is switched to a low-power voltage reference for low-power mode and to a low-noise voltage reference for low-noise mode. The LDO provides a constant voltage output to a crystal oscillator. A clock signal is generated using the crystal oscillator. The clock signal is limited using a low-power limiter to generate a low-power output clock signal and/or is limited using a low-noise limiter to generate a low-noise clock signal. The low-power output clock signal or the low-noise output clock signal is selected using a mux.

Abstract translation: 本文描述了提供低功率时钟信号或低噪声时钟信号的方法。 确定是否使用低功率模式或低噪声模式。 低压差稳压器（LDO）的基准输入电压切换为低功耗模式的低功耗电压基准电压，低噪声电压基准输入低噪声电压基准电压。 LDO为晶体振荡器提供恒定电压输出。 使用晶体振荡器产生时钟信号。 使用低功率限幅器来限制时钟信号以产生低功率输出时钟信号和/或使用低噪声限制器来限制以产生低噪声时钟信号。 使用多路复用器选择低功耗输出时钟信号或低噪声输出时钟信号。

公开(公告)号：US20110306311A1

公开(公告)日：2011-12-15

申请号：US12802604

申请日：2010-06-09

Applicant: Yuyu Chang ,  Ahmad Yazdi ,  Hooman Darabi

Inventor： Yuyu Chang ,  Ahmad Yazdi ,  Hooman Darabi

IPC: H04B1/40

CPC classification number: H03L1/00

Abstract: According to one embodiment, a radio frequency (RF) transceiver includes a local oscillator generator (LOGEN) circuit configured to receive an adaptive supply voltage. The LOGEN circuit is coupled to a variable power supply for providing the adaptive supply voltage. A process monitor for the LOGEN circuit is in communication with the variable power supply through a power supply programming module. As a result, the adaptive supply voltage can be adjusted according to data supplied by the process monitor. A method for adaptively powering a LOGEN circuit comprises providing power to an RF device, monitoring a process corner of said LOGEN circuit, determining a supply voltage corresponding to the process corner, and adjusting the supply voltage to adaptively power the LOGEN circuit.

Abstract translation: 根据一个实施例，射频（RF）收发器包括被配置为接收自适应电源电压的本地振荡器发生器（LOGEN）电路。 LOGEN电路耦合到可变电源以提供自适应电源电压。 LOGEN电路的过程监控器通过电源编程模块与可变电源通信。 因此，可以根据过程监视器提供的数据来调节自适应电源电压。 一种用于自适应地为LOGEN电路供电的方法包括向RF设备提供电力，监测所述LOGEN电路的过程角，确定对应于过程角的电源电压，以及调整电源电压以自适应地为LOGEN电路供电。