公开(公告)号：US07411381B2

公开(公告)日：2008-08-12

申请号：US11446408

申请日：2006-06-02

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: G05F3/16

CPC classification number: H03H7/06 ,  H03H7/0153 ,  H03H2210/043 ,  H03L7/06

Abstract: According to one general aspect, an apparatus includes a first resistor in a first current path of a resistor-capacitor (RC) circuit, the resistor connected to a power source. A variable capacitor is included in a second current path of the RC circuit and operably connected to the power source and a virtual ground generator. A comparison circuit is configured to make a determination regarding a voltage VR across the resistor to a ground relative to a voltage VC across the capacitor to a virtual ground from the virtual ground generator. A control circuit is configured to make an adjustment of a value of the variable capacitor, based on the determination.

Abstract translation: 根据一个一般方面，一种装置包括在电阻 - 电容（RC）电路的第一电流路径中的第一电阻器，该电阻器连接到电源。 可变电容器包括在RC电路的第二电流路径中并且可操作地连接到电源和虚拟接地发生器。 比较电路被配置为将电阻器两端的电压VR相对于电容器两端的电压VC相对于来自虚拟接地发生器的虚拟接地确定。 控制电路被配置为基于该确定来调整可变电容器的值。

公开(公告)号：US20070279032A1

公开(公告)日：2007-12-06

申请号：US11446408

申请日：2006-06-02

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: G05F3/16

CPC classification number: H03H7/06 ,  H03H7/0153 ,  H03H2210/043 ,  H03L7/06

Abstract: According to one general aspect, an apparatus includes a first resistor in a first current path of a resistor-capacitor (RC) circuit, the resistor connected to a power source. A variable capacitor is included in a second current path of the RC circuit and operably connected to the power source and a virtual ground generator. A comparison circuit is configured to make a determination regarding a voltage VR across the resistor to a ground relative to a voltage VC across the capacitor to a virtual ground from the virtual ground generator. A control circuit is configured to make an adjustment of a value of the variable capacitor, based on the determination.

Abstract translation: 根据一个一般方面，一种装置包括在电阻 - 电容（RC）电路的第一电流路径中的第一电阻器，该电阻器连接到电源。 可变电容器包括在RC电路的第二电流路径中并且可操作地连接到电源和虚拟接地发生器。 比较电路被配置为将电阻器两端的电压VR相对于电容器两端的电压VC相对于来自虚拟接地发生器的虚拟接地确定。 控制电路被配置为基于该确定来调整可变电容器的值。

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。

公开(公告)号：US20100039194A1

公开(公告)日：2010-02-18

申请号：US12241103

申请日：2008-09-30

Applicant: Hooman Darabi ,  Yuyu Chang ,  Zhimin Zhou ,  Morteza Vadipour

Inventor： Hooman Darabi ,  Yuyu Chang ,  Zhimin Zhou ,  Morteza Vadipour

IPC: H03J3/20

CPC classification number: H03L1/00 ,  H03B5/364 ,  H03B2201/0291 ,  H03J2200/10

Abstract: A frequency tuning device for use in a crystal oscillator circuit includes a first fine tuning array of capacitors, a second fine tuning array of capacitors and a coarse tuning array of capacitors coupled in parallel to produce a tuning capacitance for tuning the crystal oscillator. The first fine tuning array of capacitors includes a binary weighted switched capacitor network, the second fine tuning array of capacitors includes a thermometer coded switched capacitor network and the coarse tuning array of capacitors includes a binary weighted switched capacitor network with a different unit capacitance value than the first and second fine tuning arrays.

公开(公告)号：US08385877B2

公开(公告)日：2013-02-26

申请号：US13033289

申请日：2011-02-23

Applicant: Yuyu Chang ,  Hooman Darabi

Inventor： Yuyu Chang ,  Hooman Darabi

IPC: H04B1/16 ,  H03F3/45

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：US20110018604A1

公开(公告)日：2011-01-27

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: H03L5/00

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）的参考电压输入端被切换到低功耗模式的低功耗参考电压，低噪声模式的低噪声电压基准用。 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：US07782152B2

公开(公告)日：2010-08-24

申请号：US12241103

申请日：2008-09-30

Applicant: Hooman Darabi ,  Yuyu Chang ,  Zhimin Zhou ,  Morteza Vadipour

Inventor： Hooman Darabi ,  Yuyu Chang ,  Zhimin Zhou ,  Morteza Vadipour

IPC: H03B5/32

CPC classification number: H03L1/00 ,  H03B5/364 ,  H03B2201/0291 ,  H03J2200/10

Abstract: A frequency tuning device for use in a crystal oscillator circuit includes a first fine tuning array of capacitors, a second fine tuning array of capacitors and a coarse tuning array of capacitors coupled in parallel to produce a tuning capacitance for tuning the crystal oscillator. The first fine tuning array of capacitors includes a binary weighted switched capacitor network, the second fine tuning array of capacitors includes a thermometer coded switched capacitor network and the coarse tuning array of capacitors includes a binary weighted switched capacitor network with a different unit capacitance value than the first and second fine tuning arrays.

Abstract translation: 用于晶体振荡器电路的频率调谐装置包括电容器的第一微调阵列，电容器的第二微调阵列和并联耦合的电容器的粗调阵列，以产生用于调谐晶体振荡器的调谐电容。 电容器的第一微调阵列包括二进制加权开关电容器网络，第二微调阵列的电容器包括温度计编码的开关电容器网络，并且电容器的粗调阵列包括具有不同单位电容值的二进制加权开关电容器网络 第一和第二微调阵列。