公开(公告)号：US20100327986A1

公开(公告)日：2010-12-30

申请号：US12825221

申请日：2010-06-28

申请人： Chinmaya Mishra ,  Rajagopalan Rangarajan ,  Hongyan Yan

发明人： Chinmaya Mishra ,  Rajagopalan Rangarajan ,  Hongyan Yan

IPC分类号： H03B5/12 ,  H03L5/00

CPC分类号： H03L5/00 ,  H03L7/099

摘要： A circuit for a voltage controlled oscillator (VCO) buffer is described. The circuit includes a first capacitor connected to an input of the VCO buffer that is connected to a VCO core. The circuit also includes a second capacitor connected to the input of the VCO buffer and the gate of a p-type metal-oxide-semiconductor field effect (PMOS) transistor. The circuit further includes a first switch connected to the first capacitor and the gate of the PMOS transistor. The circuit also includes a third capacitor connected to the input of the VCO buffer. The circuit further includes a fourth capacitor connected to the input of the VCO buffer and the gate of an n-type metal-oxide-semiconductor field effect (NMOS) transistor. The circuit also includes a second switch connected to the third capacitor and the gate of the NMOS transistor.

摘要翻译： 描述了用于压控振荡器（VCO）缓冲器的电路。 电路包括连接到VCO缓冲器的输入的第一电容器，其连接到VCO核心。 电路还包括连接到VCO缓冲器的输入端和p型金属氧化物半导体场效应（PMOS）晶体管的栅极的第二电容器。 电路还包括连接到第一电容器和PMOS晶体管的栅极的第一开关。 该电路还包括连接到VCO缓冲器的输入的第三电容器。 电路还包括连接到VCO缓冲器的输入端和n型金属氧化物半导体场效应（NMOS）晶体管的栅极的第四电容器。 电路还包括连接到第三电容器和NMOS晶体管的栅极的第二开关。

公开(公告)号：US08242854B2

公开(公告)日：2012-08-14

申请号：US12825221

申请日：2010-06-28

申请人： Chinmaya Mishra ,  Rajagopalan Rangarajan ,  Hongyan Yan

发明人： Chinmaya Mishra ,  Rajagopalan Rangarajan ,  Hongyan Yan

IPC分类号： H03B5/12 ,  H03L5/00 ,  H03K17/16

CPC分类号： H03L5/00 ,  H03L7/099

摘要： A circuit for a voltage controlled oscillator (VCO) buffer is described. The circuit includes a first capacitor connected to an input of the VCO buffer that is connected to a VCO core. The circuit also includes a second capacitor connected to the input of the VCO buffer and the gate of a p-type metal-oxide-semiconductor field effect (PMOS) transistor. The circuit further includes a first switch connected to the first capacitor and the gate of the PMOS transistor. The circuit also includes a third capacitor connected to the input of the VCO buffer. The circuit further includes a fourth capacitor connected to the input of the VCO buffer and the gate of an n-type metal-oxide-semiconductor field effect (NMOS) transistor. The circuit also includes a second switch connected to the third capacitor and the gate of the NMOS transistor.

摘要翻译： 描述了用于压控振荡器（VCO）缓冲器的电路。 电路包括连接到VCO缓冲器的输入的第一电容器，其连接到VCO核心。 电路还包括连接到VCO缓冲器的输入端和p型金属氧化物半导体场效应（PMOS）晶体管的栅极的第二电容器。 电路还包括连接到第一电容器和PMOS晶体管的栅极的第一开关。 该电路还包括连接到VCO缓冲器的输入的第三电容器。 电路还包括连接到VCO缓冲器的输入端和n型金属氧化物半导体场效应（NMOS）晶体管的栅极的第四电容器。 电路还包括连接到第三电容器和NMOS晶体管的栅极的第二开关。

公开(公告)号：US08963610B2

公开(公告)日：2015-02-24

申请号：US13468696

申请日：2012-05-10

申请人： Chinmaya Mishra ,  Hongyan Yan ,  Junxiong Deng

发明人： Chinmaya Mishra ,  Hongyan Yan ,  Junxiong Deng

IPC分类号： G06F7/44 ,  G06G7/12 ,  H03D7/14

CPC分类号： G06G7/12 ,  H03D7/1458 ,  H03D7/1483 ,  H03D2200/0086

摘要： An adaptable mixer device is operable in a first mode and a second mode and includes a first set of mixer units operable in the first mode and a second set of mixer units operable in the second mode. The second set of mixer units includes at least one mixer unit that is common to both the first set of mixer units and the second set of mixer units. The second set of mixer units also includes a plurality of mixer units that are not in the first set of mixer units. Similarly, the first set of mixer units including a plurality of mixer units that are not in the second set of mixer units.

摘要翻译： 适应性混合器装置可在第一模式和第二模式中操作，并且包括可在第一模式下操作的第一组混频器单元和可在第二模式下操作的第二组混频器单元。 第二组混合器单元包括至少一个混合器单元，其对于第一组混合器单元和第二组混合器单元共同。 第二组混合器单元还包括不在第一组混合器单元中的多个混合器单元。 类似地，第一组混合器单元包括不在第二组混合器单元中的多个混合器单元。

公开(公告)号：US20130300489A1

公开(公告)日：2013-11-14

申请号：US13468696

申请日：2012-05-10

申请人： Chinmaya Mishra ,  Hongyan Yan ,  Junxiong Deng

发明人： Chinmaya Mishra ,  Hongyan Yan ,  Junxiong Deng

IPC分类号： G06G7/12

CPC分类号： G06G7/12 ,  H03D7/1458 ,  H03D7/1483 ,  H03D2200/0086

摘要： An adaptable mixer device is operable in a first mode and a second mode and includes a first set of mixer units operable in the first mode and a second set of mixer units operable in the second mode. The second set of mixer units includes at least one mixer unit that is common to both the first set of mixer units and the second set of mixer units. The second set of mixer units also includes a plurality of mixer units that are not in the first set of mixer units. Similarly, the first set of mixer units including a plurality of mixer units that are not in the second set of mixer units.

摘要翻译： 适应性混合器装置可在第一模式和第二模式中操作，并且包括可在第一模式下操作的第一组混频器单元和可在第二模式下操作的第二组混频器单元。 第二组混合器单元包括至少一个混合器单元，其对于第一组混合器单元和第二组混合器单元共同。 第二组混合器单元还包括不在第一组混合器单元中的多个混合器单元。 类似地，第一组混合器单元包括不在第二组混合器单元中的多个混合器单元。

公开(公告)号：US09197161B2

公开(公告)日：2015-11-24

申请号：US12553525

申请日：2009-09-03

申请人： Bhushan S. Asuri ,  Hongyan Yan

发明人： Bhushan S. Asuri ,  Hongyan Yan

IPC分类号： H04L25/34 ,  H04L25/49 ,  H03D7/18 ,  H03K4/02

CPC分类号： H03D7/18 ,  H03D2200/0086 ,  H03K4/026

摘要： The mixer of a transmit chain of a wireless transmitter (such as the transmitter of a cellular telephone handset) is driven with low third harmonic in-phase (I) and quadrature (Q) signals. The low third harmonic I and Q signals have three or more signal levels, and transition between the these three or more signal levels at times such that each of the I and Q signals approximates a sine wave and has minimal third harmonic spectral components. In one example, reducing the third harmonic components of the I and Q signals simplifies design of amplifier stages of the transmitter and helps reduce receive band noise.

摘要翻译： 无线发射机（例如蜂窝电话听筒的发射机）的发射链的混频器由低三次谐波同相（I）和正交（Q）信号驱动。 低三次谐波I和Q信号具有三个或更多个信号电平，以及这些三个或更多个信号电平之间的转变，这些时间使得I和Q信号中的每一个接近正弦波并且具有最小的三次谐波频谱分量。 在一个示例中，减小I和Q信号的三次谐波分量简化了发射机的放大器级的设计，并有助于降低接收频带噪声。

公开(公告)号：US20110051838A1

公开(公告)日：2011-03-03

申请号：US12553525

申请日：2009-09-03

申请人： Bhushan S. Asuri ,  Hongyan Yan

发明人： Bhushan S. Asuri ,  Hongyan Yan

IPC分类号： H04L25/49

CPC分类号： H03D7/18 ,  H03D2200/0086 ,  H03K4/026

摘要： The mixer of a transmit chain of a wireless transmitter (such as the transmitter of a cellular telephone handset) is driven with low third harmonic in-phase (I) and quadrature (Q) signals. The low third harmonic I and Q signals have three or more signal levels, and transition between the these three or more signal levels at times such that each of the I and Q signals approximates a sine wave and has minimal third harmonic spectral components. In one example, reducing the third harmonic components of the I and Q signals simplifies design of amplifier stages of the transmitter and helps reduce receive band noise.

摘要翻译： 无线发射机（例如蜂窝电话听筒的发射机）的发射链的混频器由低三次谐波同相（I）和正交（Q）信号驱动。 低三次谐波I和Q信号具有三个或更多个信号电平，以及这些三个或更多个信号电平之间的转变，这些时间使得I和Q信号中的每一个接近正弦波并且具有最小的三次谐波频谱分量。 在一个示例中，减小I和Q信号的三次谐波分量简化了发射机的放大器级的设计，并有助于降低接收频带噪声。

公开(公告)号：US08903344B2

公开(公告)日：2014-12-02

申请号：US12957247

申请日：2010-11-30

申请人： Hongyan Yan ,  Bhushan Shanti Asuri ,  Vinod V Panikkath ,  Janakiram G Sankaranarayanan ,  Himanshu Khatri

发明人： Hongyan Yan ,  Bhushan Shanti Asuri ,  Vinod V Panikkath ,  Janakiram G Sankaranarayanan ,  Himanshu Khatri

IPC分类号： H04B1/06 ,  H03H7/24

CPC分类号： H03H7/24

摘要： Disclosed are circuits, techniques and methods for implementing an attenuator in a signal transmission path. In one particular implementation, an attenuation may be adjusted based, at least in part, on a control signal. In another implementation, such an attenuation may be adjusted in coarse increments by varying one or more gate voltages applied one or more transistors. In yet another implementation, adjusting said attenuation in fine increments by varying a bias voltage applied to at least one level shifter.

摘要翻译： 公开了用于在信号传输路径中实现衰减器的电路，技术和方法。 在一个特定实现中，可以至少部分地基于控制信号来调整衰减。 在另一实现中，可以通过改变施加一个或多个晶体管的一个或多个栅极电压来以粗略增量来调整这种衰减。 在又一实施方案中，通过改变施加到至少一个电平移位器的偏置电压来以微小增量来调节所述衰减。

公开(公告)号：US08514008B2

公开(公告)日：2013-08-20

申请号：US12883940

申请日：2010-09-16

申请人： Hongyan Yan ,  Janakiram Ganesh Sankaranarayanan ,  Bhushan Shanti Asuri ,  Himanshu Khatri ,  Vinod V. Panikkath

发明人： Hongyan Yan ,  Janakiram Ganesh Sankaranarayanan ,  Bhushan Shanti Asuri ,  Himanshu Khatri ,  Vinod V. Panikkath

IPC分类号： H03K17/687

CPC分类号： H03K17/063 ,  H03K17/161 ,  H03K17/687 ,  H03K2017/066 ,  H03K2217/0018 ,  H03K2217/0054

摘要： In a first aspect, an RF switch includes a main transistor and a gate-to-source shorting circuit. When the RF switch is turned off, the gate-to-source shorting circuit is turned on to short the source and gate of the main transistor together, thereby preventing a Vgs from developing that would cause the main transistor to leak. When the RF switch is turned on, the gate-to-source shorting circuit is turned off to decouple the source from the gate. The gate is supplied with a digital logic high voltage to turn on the main transistor. In a second aspect, an RF switch includes a main transistor that has a bulk terminal. When the RF switch is turned off, the bulk is connected to ground through a high resistance. When the RF switch is turned on, the source and bulk are shorted together thereby reducing the threshold voltage of the main transistor.

摘要翻译： 在第一方面，RF开关包括主晶体管和栅极至源极短路电路。 当RF开关关闭时，栅极 - 源极短路电路导通，将主晶体管的源极和栅极连接在一起，从而防止Vgs发展，导致主晶体管泄漏。 当RF开关导通时，栅极至源极短路电路被关闭，以使源极与栅极分离。 门提供数字逻辑高电压来接通主晶体管。 在第二方面，RF开关包括具有大容量端子的主晶体管。 当RF开关关闭时，体积通过高电阻连接到地。 当RF开关导通时，源极和体积短路在一起，从而降低了主晶体管的阈值电压。

公开(公告)号：US08493126B2

公开(公告)日：2013-07-23

申请号：US12836779

申请日：2010-07-15

申请人： Janakiram G. Sankaranarayanan ,  Bhushan S. Asuri ,  Vinod V. Panikkath ,  Hongyan Yan ,  Himanshu Khatri ,  Maulin Bhagat

发明人： Janakiram G. Sankaranarayanan ,  Bhushan S. Asuri ,  Vinod V. Panikkath ,  Hongyan Yan ,  Himanshu Khatri ,  Maulin Bhagat

IPC分类号： G06G7/12

CPC分类号： H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/0023 ,  H03H7/1775 ,  H03H7/422 ,  H03H7/465

摘要： An RF transmitter capable of transmitting over a wide range of frequencies includes a mixer, a wideband high-Q balun, a first driver amplifier and a second driver amplifier. The balun has a single primary winding and two secondary windings. A differential output of the mixer is coupled to the primary winding. A first of the two secondary windings is coupled to drive the first driver amplifier. A second of the two secondary windings is coupled to drive the second driver amplifier. One driver amplifier is used when transmitting at lower frequencies whereas the other driver amplifier is used when transmitting at higher frequencies. By appropriate sizing of the inductances of the secondary windings and by switching out one of the secondary windings at certain times, the balun is tunable to operate over the wide frequency range while having a high quality factor Q, thereby facilitating reduced power consumption while simultaneously meeting performance requirements.

摘要翻译： 能够在宽频率范围内发射的RF发射机包括混频器，宽带高Q平衡 - 不平衡变换器，第一驱动器放大器和第二驱动器放大器。 平衡 - 不平衡转换器具有单个初级绕组和两个次级绕组。 混频器的差分输出耦合到初级绕组。 两个次级绕组中的第一个被耦合以驱动第一驱动放大器。 两个次级绕组中的第二个被耦合以驱动第二个驱动放大器。 当以较低频率发射时使用一个驱动放大器，而在较高频率下传输时使用另一个驱动放大器。 通过适当地确定次级绕组的电感和通过在某些时间切换出一个次级绕组，平衡 - 不平衡变换器可以在宽频率范围内工作，同时具有高品质因数Q，从而有助于降低功耗，同时满足 性能要求。

公开(公告)号：US20120135698A1

公开(公告)日：2012-05-31

申请号：US12957247

申请日：2010-11-30

申请人： Hongyan Yan ,  Bhushan Shanti Asuri ,  Vinod V. Panikkath ,  Janakiram G. Sankaranarayanan ,  Himanshu Khatri

发明人： Hongyan Yan ,  Bhushan Shanti Asuri ,  Vinod V. Panikkath ,  Janakiram G. Sankaranarayanan ,  Himanshu Khatri

IPC分类号： H04W52/00

CPC分类号： H03H7/24

摘要： Disclosed are circuits, techniques and methods for implementing an attenuator in a signal transmission path. In one particular implementation, an attenuation may be adjusted based, at least in part, on a control signal. In another implementation, such an attenuation may be adjusted in coarse increments by varying one or more gate voltages applied one or more transistors. In yet another implementation, adjusting said attenuation in fine increments by varying a bias voltage applied to at least one level shifter.

摘要翻译： 公开了用于在信号传输路径中实现衰减器的电路，技术和方法。 在一个特定实现中，可以至少部分地基于控制信号来调整衰减。 在另一实现中，可以通过改变施加一个或多个晶体管的一个或多个栅极电压来以粗略增量来调整这种衰减。 在又一实施方案中，通过改变施加到至少一个电平移位器的偏置电压来以微小增量来调节所述衰减。