公开(公告)号：US09543897B2

公开(公告)日：2017-01-10

申请号：US14622591

申请日：2015-02-13

Applicant: QUALCOMM Incorporated

Inventor： Cheng-Han Wang ,  Alberto Cicalini ,  Thinh Cat Nguyen ,  Mohammad Bagher Vahid Far ,  Jesse Aaron Richmond

IPC: G06G7/12 ,  H03D7/14 ,  H03D7/16

CPC classification number: H03D7/145 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D2200/0027

Abstract: A method, an apparatus, and a system product for mixing radio frequency signals are provided. In one aspect, the apparatus is configured to perform switching of switches based on first, second, third, and fourth phased half duty clock signals. The apparatus convolves a differential input signal on a differential input port with the first, second, third, and fourth phased half duty cycle clock signals to concurrently generate a differential in-phase output signal and a differential quadrature-phase output signal on a dual differential output port. The first, second, third, and fourth phased half duty cycle clock signals are of the same frequency and out of phase by a multiple of ninety degrees with respect to each other.

Abstract translation: 提供了一种用于混合射频信号的方法，装置和系统产品。 一方面，该装置被配置为基于第一，第二，第三和第四相位半占空时钟信号来执行开关的切换。 该装置利用第一，第二，第三和第四相位半占空比时钟信号在差分输入端口上卷积差分输入信号，以同时产生差分同相输出信号和双差分上的差分正交相输出信号 输出端口 第一，第二，第三和第四相位半占空比时钟信号的频率相同，相位相差90度。

公开(公告)号：US10050586B2

公开(公告)日：2018-08-14

申请号：US15438138

申请日：2017-02-21

Applicant: QUALCOMM Incorporated

Inventor： Thinh Cat Nguyen ,  Jeongsik Yang ,  Roger Thomas Brockenbrough ,  Ara Bicakci ,  Anup Savla ,  Shen Wang

IPC: H03B5/12

Abstract: Certain aspects of the present disclosure generally relate to voltage-controlled oscillators (VCOs) using a lowered or an adjustable negative transconductance (−gm) compared to conventional VCOs. This −gm degeneration technique suppresses the noise injected into an inductor-capacitor (LC) tank of the VCO, thereby providing lower signal-to-noise ratio (SNR) for a given VCO voltage swing, lower power consumption, and decreased phase noise. One example VCO generally includes a resonant tank circuit, an active negative transconductance circuit connected with the resonant tank circuit, and a bias current circuit for sourcing or sinking a bias current through the resonant tank circuit and the active negative transconductance circuit to generate an oscillating signal. The active negative transconductance circuit includes cross-coupled transistors and an impedance connected between the cross-coupled transistors and a reference voltage.

公开(公告)号：US09455723B2

公开(公告)日：2016-09-27

申请号：US14743360

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Mohammad Bagher Vahid Far ,  Ara Bicakci ,  Alireza Khalili ,  Ashkan Borna ,  Thinh Cat Nguyen

IPC: H03L7/06 ,  H03L7/08 ,  H03L7/093 ,  H02M3/07

CPC classification number: H03L7/0802 ,  H02M3/07 ,  H03L7/0891 ,  H03L7/093

Abstract: Certain aspects of the present disclosure provide methods and apparatus for compensating, or at least adjusting, for capacitor leakage. One example method generally includes determining a leakage voltage corresponding to a leakage current of a capacitor in a filter for a phase-locked loop (PLL), wherein the determining comprises closing a set of switches for discontinuous sampling of the leakage voltage; based on the sampled leakage voltage, generating a sourced current approximately equal to the leakage current; and injecting the sourced current into the capacitor.

Abstract translation: 本公开的某些方面提供了用于补偿或至少调整电容器泄漏的方法和装置。 一个示例性方法通常包括确定对应于用于锁相环（PLL）的滤波器中的电容器的漏电流的泄漏电压，其中所述确定包括闭合一组开关以不连续地采样泄漏电压; 基于采样的泄漏电压，产生大致等于泄漏电流的源电流; 并将源电流注入电容器。

公开(公告)号：US09647638B2

公开(公告)日：2017-05-09

申请号：US14331685

申请日：2014-07-15

Applicant: QUALCOMM Incorporated

Inventor： Mohammad Bagher Vahid Far ,  Cheng-Han Wang ,  Jesse Aaron Richmond ,  Thinh Cat Nguyen ,  Abbas Komijani ,  Yashar Rajavi ,  Alireza Khalili

IPC: G06F17/10 ,  H03H11/04 ,  H03H11/12 ,  H04B1/10 ,  H04B1/525

CPC classification number: H03H11/0433 ,  H03H11/1252 ,  H04B1/109 ,  H04B1/525

Abstract: A method and apparatus for minimizing transmit signal interference is provided. The method includes the steps of: receiving a signal and amplifying the received signal. The received signal is then mixed with an intermediate frequency signal to obtain a baseband modulated signal. The baseband modulated signal is first filtered in an RC filter. The resulting signal is then divided by a preselected amount and the first divided portion is sent to a main path of a biquad filter, which produces a first stage biquad filtered signal. The second portion of the divided signal is sent to an auxiliary path of the biquad filter, and produces a second filtered signal. The first and second signals are then recombined and sent to the second stage of the biquad filter, where further filtering takes place.

公开(公告)号：US09634607B2

公开(公告)日：2017-04-25

申请号：US14204542

申请日：2014-03-11

Applicant: QUALCOMM Incorporated

Inventor： Thinh Cat Nguyen ,  Jeongsik Yang ,  Roger Thomas Brockenbrough ,  Ara Bicakci ,  Anup Savla ,  Shen Wang

IPC: H03B5/12 ,  H04B1/40

CPC classification number: H03B5/1212 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1237 ,  H03B5/1262 ,  H03B5/1278 ,  H03B5/1287 ,  H03B2200/0038 ,  H03B2200/0082 ,  H03B2200/009 ,  H04B1/40

Abstract: Certain aspects of the present disclosure generally relate to voltage-controlled oscillators (VCOs) using a lowered or an adjustable negative transconductance (−gm) compared to conventional VCOs. This −gm degeneration technique suppresses the noise injected into an inductor-capacitor (LC) tank of the VCO, thereby providing lower signal-to-noise ratio (SNR) for a given VCO voltage swing, lower power consumption, and decreased phase noise. One example VCO generally includes a resonant tank circuit, an active negative transconductance circuit connected with the resonant tank circuit, and a bias current circuit for sourcing or sinking a bias current through the resonant tank circuit and the active negative transconductance circuit to generate an oscillating signal. The active negative transconductance circuit includes cross-coupled transistors and an impedance connected between the cross-coupled transistors and a reference voltage.

公开(公告)号：US09438249B1

公开(公告)日：2016-09-06

申请号：US14860027

申请日：2015-09-21

Applicant: QUALCOMM Incorporated

Inventor： Thinh Cat Nguyen ,  Jeongsik Yang ,  Ara Bicakci ,  Shen Wang ,  Anup Savla

IPC: H03L1/02 ,  H03B5/04

CPC classification number: H03L1/023 ,  H03L7/099

Abstract: Certain aspects of the present disclosure provide methods and apparatus for temperature-dependent adjustment of a resonant circuit, such as that found in a voltage-controlled oscillator (VCO). Such adjustment may be performed in an effort to compensate for the frequency drift of the resonant circuit due to temperature changes. One example adjustment circuit for temperature-dependent adjustment of a resonant circuit generally includes at least one varactor and two sets of semiconductor devices configured to apply, across the at least one varactor, a differential adjustment voltage based on an ambient temperature of the semiconductor devices to adjust a capacitance of the at least one varactor, wherein each device in the sets of semiconductor devices has a temperature-dependent junction and wherein the two sets of semiconductor devices are configured such that voltage changes of the temperature-dependent junctions in the two sets of semiconductor devices are added in the differential adjustment voltage.

Abstract translation: 本公开的某些方面提供了用于谐振电路的温度依赖性调节的方法和装置，例如在压控振荡器（VCO）中发现的谐振电路。 可以进行这种调整以努力补偿由于温度变化引起的谐振电路的频率漂移。 用于谐振电路的温度依赖性调节的一个示例性调节电路通常包括至少一个变容二极管和两组半导体器件，其被配置为跨越至少一个变容二极管将基于半导体器件的环境温度的差分调节电压施加到 调整所述至少一个变容二极管的电容，其中所述半导体器件组中的每个器件具有温度依赖性结，并且其中所述两组半导体器件被配置为使得两组中的温度依赖性结的电压变化 半导体器件被添加在差分调整电压中。

公开(公告)号：US09356768B2

公开(公告)日：2016-05-31

申请号：US14495183

申请日：2014-09-24

Applicant: QUALCOMM Incorporated

Inventor： David Ta-Hsiang Lin ,  Yongwang Ding ,  Young Gon Kim ,  Thinh Cat Nguyen ,  Jeongsik Yang ,  Sang-Oh Lee

IPC: H04L7/00 ,  H03K5/22 ,  H03M1/34 ,  H04B1/40 ,  H03K5/00

CPC classification number: H03M1/34 ,  H03K5/22 ,  H03K2005/00286 ,  H04B1/40

Abstract: Certain aspects of the present invention provide methods and apparatus for detecting phase shift between signals, such as local oscillating signals in adjacent transceiver paths. One example circuit for phase detection generally includes a mixer configured to mix a first input signal having a first frequency with a second input signal having a second frequency to produce an output signal having frequency components at the sum of and the difference between the first and second frequencies; a filter connected with the mixer and configured to remove one of the frequency components at the sum of the first and second frequencies, thereby leaving a DC component; and an analog-to-digital converter (ADC) (e.g., a comparator) connected with the filter and configured to determine whether the first input signal is in-phase or out-of-phase with the second input signal based on a comparison between the DC component and a reference signal.

Abstract translation: 本发明的某些方面提供用于检测信号之间的相移的方法和装置，例如相邻收发器路径中的本地振荡信号。 用于相位检测的一个示例电路通常包括混频器，其被配置为将具有第一频率的第一输入信号与具有第二频率的第二输入信号混合，以产生具有频率分量在第一和第二频率之和之间的频率分量的输出信号 频率; 滤波器，与所述混频器连接并且被配置为以所述第一和第二频率的和去除所述频率分量中的一个，从而留下DC分量; 以及与所述滤波器连接并且被配置为基于所述第二输入信号与所述第二输入信号之间的比较来确定所述第一输入信号是与所述第二输入信号是同相还是异相的模拟 - 数字转换器（例如，比较器） DC分量和参考信号。

公开(公告)号：US20160020752A1

公开(公告)日：2016-01-21

申请号：US14331685

申请日：2014-07-15

Applicant: QUALCOMM Incorporated

Inventor： Mohammad Bagher Vahid Far ,  Cheng-Han Wang ,  Jesse Aaron Richmond ,  Thinh Cat Nguyen ,  Abbas Komijani ,  Yashar Rajavi ,  Alireza Khalili

IPC: H03H17/02

CPC classification number: H03H11/0433 ,  H03H11/1252 ,  H04B1/109 ,  H04B1/525

Abstract: A method and apparatus for minimizing transmit signal interference is provided. The method includes the steps of: receiving a signal and amplifying the received signal. The received signal is then mixed with an intermediate frequency signal to obtain a baseband modulated signal. The baseband modulated signal is first filtered in an RC filter. The resulting signal is then divided by a preselected amount and the first divided portion is sent to a main path of a biquad filter, which produces a first stage biquad filtered signal. The second portion of the divided signal is sent to an auxiliary path of the biquad filter, and produces a second filtered signal. The first and second signals are then recombined and sent to the second stage of the biquad filter, where further filtering takes place.

Abstract translation: 提供一种用于最小化发射信号干扰的方法和装置。 该方法包括以下步骤：接收信号并放大所接收的信号。 然后将接收到的信号与中频信号混合以获得基带调制信号。 首先在RC滤波器中过滤基带调制信号。 然后将所得信号除以预选量，并将第一分割部分发送到双二阶滤波器的主路径，其产生第一级双二进制滤波信号。 分频信号的第二部分被发送到二叉滤波器的辅助路径，并且产生第二滤波信号。 然后将第一和第二信号重新组合并发送到二级滤波器的第二级，其中进行进一步的滤波。

公开(公告)号：US20160006422A1

公开(公告)日：2016-01-07

申请号：US14322603

申请日：2014-07-02

Applicant: QUALCOMM Incorporated

Inventor： Thinh Cat Nguyen ,  Jeongsik Yang ,  Shen Wang ,  Ara Bicakci ,  Anup Savla ,  Babak Vakili-Amini

IPC: H03K3/356 ,  H03K3/012

CPC classification number: H03K3/012 ,  H03K3/356139

Abstract: A dynamic latch is disclosed that may reduce power consumption in frequency dividers while widening their frequency operation ranges. The dynamic latch includes a sense component to detect an input voltage in response to a first state of a mode select signal, and to generate an output voltage based, at least in part, on the input voltage; a hold component to retain the output voltage in response to a second state of the mode select signal; and a first transistor, coupled between the sense component and ground potential, including a gate responsive to the mode select signal.

Abstract translation: 公开了一种动态锁存器，其可以在扩大其频率操作范围的同时降低分频器中的功率消耗。 动态锁存器包括响应于模式选择信号的第一状态来检测输入电压并且至少部分地基于输入电压产生输出电压的感测部件; 保持部件，用于响应于模式选择信号的第二状态来保持输出电压; 以及第一晶体管，耦合在感测组件和地电位之间，包括响应于模式选择信号的门。