公开(公告)号：US20170302238A1

公开(公告)日：2017-10-19

申请号：US15488365

申请日：2017-04-14

Applicant: FCI Inc.

Inventor： SeongHun Jeong

IPC: H03F3/45 ,  H03G3/30 ,  H03F3/189

CPC classification number: H03G3/3052 ,  H03F3/19 ,  H03F3/45475 ,  H03F3/45973 ,  H03F2200/294 ,  H03F2203/45521 ,  H03G3/001 ,  H03G3/3068 ,  H03G2201/202 ,  H03G2201/40

Abstract: Disclosed herein is a DC offset cancellation circuit. The DC offset cancellation circuit includes a DC feedback unit configured to vary a DC feedback (DCFB) bandwidth to add at least one mid-bandwidth to the DCFB bandwidth and to provide a delay time in each case in order to reduce the DC droop error that occurs in switching from the high bandwidth (BW) to the mid-BW or from the mid-BW mode to the low BW mode, such that stable settling is ensured.

公开(公告)号：US20120164965A1

公开(公告)日：2012-06-28

申请号：US13193255

申请日：2011-07-28

Applicant: Jeffrey Paul Solum

Inventor： Jeffrey Paul Solum

IPC: H04B17/00

CPC classification number: H04B1/1027 ,  H03G3/3052 ,  H03G2201/202 ,  H03G2201/206 ,  H04B1/109 ,  H04L27/3809

Abstract: One embodiment of the present subject matter includes a method of receiving an input signal. The method, in various embodiments, includes detecting a peak of the input signal and detecting an envelope of the input signal. In various embodiments, the peak and envelope are used to identify out-of-band blocking signals and to adjust gain control. The method also includes comparing the peak to a first threshold Tp and comparing the envelope to a second threshold Te. In the method, if the peak is above the first threshold and the envelope is below the second threshold, then ignoring the input signal. If the envelope is above the second threshold, the method includes applying automatic gain control to decode information encoded in the input signal.

Abstract translation: 本主题的一个实施例包括接收输入信号的方法。 在各种实施例中，该方法包括检测输入信号的峰值并检测输入信号的包络。 在各种实施例中，峰值和包络用于识别带外阻塞信号并调整增益控制。 该方法还包括将峰值与第一阈值Tp进行比较并将包络与第二阈值Te进行比较。 在该方法中，如果峰值高于第一阈值并且包络低于第二阈值，则忽略输入信号。 如果信封高于第二阈值，则该方法包括应用自动增益控制来对输入信号中编码的信息进行解码。

公开(公告)号：US07668053B2

公开(公告)日：2010-02-23

申请号：US10908992

申请日：2005-06-03

Applicant: Bassel Haddad

Inventor： Bassel Haddad

IPC: G11B7/00

CPC classification number: H03G3/001 ,  H03G3/3052 ,  H03G2201/202

Abstract: An automatic gain control (AGC) controls the signal amplitude at the input to an analog to digital converter (ADC) input by applying a gain that produces a desired overall amplitude resolution of the patterns actually presented by the signal delivered by the ADC converter. Short RLL patterns will have sufficient resolution for reliable extraction as a result of having sufficient overall amplitude, which thereby strengthens the ability of the read channel to correctly extract data. Moreover, the system determines correct AGC settings responsive to measurements of user data parameters. The system also detects and corrects for DC offsets in the signal whose gain is controlled.

Abstract translation: 自动增益控制（AGC）通过施加增益来控制模数转换器（ADC）输入端的信号幅度，该增益产生由ADC转换器传送的信号实际呈现的模式的期望的总幅度分辨率。 由于具有足够的总体幅度，短的RLL图案将具有足够的分辨率以进行可靠的提取，从而增强读取通道正确提取数据的能力。 此外，系统根据用户数据参数的测量来确定正确的AGC设置。 该系统还检测和校正增益受控的信号中的直流偏移。

公开(公告)号：US07664211B2

公开(公告)日：2010-02-16

申请号：US11539524

申请日：2006-10-06

Applicant: Jeffrey Paul Solum

Inventor： Jeffrey Paul Solum

IPC: H04L27/08

CPC classification number: H04B1/1027 ,  H03G3/3052 ,  H03G2201/202 ,  H03G2201/206 ,  H04B1/109 ,  H04L27/3809

Abstract: One embodiment of the present subject matter includes a method of receiving an input signal. The method, in various embodiments, includes detecting a peak of the input signal and detecting an envelope of the input signal. In various embodiments, the peak and envelope are used to identify out-of-band blocking signals and to adjust gain control. The method also includes comparing the peak to a first threshold Tp and comparing the envelope to a second threshold Te. In the method, if the peak is above the first threshold and the envelope is below the second threshold, then ignoring the input signal. If the envelope is above the second threshold, the method includes applying automatic gain control to decode information encoded in the input signal.

Abstract translation: 本主题的一个实施例包括接收输入信号的方法。 在各种实施例中，该方法包括检测输入信号的峰值并检测输入信号的包络。 在各种实施例中，峰值和包络用于识别带外阻塞信号并调整增益控制。 该方法还包括将峰值与第一阈值Tp进行比较并将包络与第二阈值Te进行比较。 在该方法中，如果峰值高于第一阈值并且包络低于第二阈值，则忽略输入信号。 如果信封高于第二阈值，则该方法包括应用自动增益控制来对输入信号中编码的信息进行解码。

公开(公告)号：US07496163B2

公开(公告)日：2009-02-24

申请号：US11007159

申请日：2004-12-09

Applicant: Kenji Terao

Inventor： Kenji Terao

IPC: H04L27/08

CPC classification number: H03G3/3078 ,  H03G3/3068 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302 ,  H03G2201/307

Abstract: In a slot format of a received signal, AGC gain update timings (t1 to t4) are shifted every time to disperse and reduce an influence of a noise attributable to a direct current component specific to direct conversion which is accompanied by AGC gain update. In particular, in the case where each of slots in the received signal includes an information portion (data) having a larger code correcting capability and an information portion having a smaller code correcting capability (TPC (transmission power control), TFCI (transport format combination indicator), PILOT), the AGC gain update timing is generated while being shifted in the former information portion, thereby reduce the influence of the noise. When the amount of shift of the AGC gain update timing is set to be larger than that of one symbol of the received signal, the influence of the noise accompanied by the AGC gain update is further reduced.

Abstract translation: 在接收信号的时隙格式中，AGC增益更新定时（t1至t4）每次都被移位以分散并减小归因于伴随AGC增益更新的直接转换特有的直流分量的噪声的影响。 特别地，在接收信号中的每个时隙包括具有较大代码校正能力的信息部分（数据）和具有较小代码校正能力的信息部分（TPC（传输功率控制）），TFCI（传输格式组合 指示器），PILOT）时，在前一个信息部分中移动时产生AGC增益更新定时，从而减少噪声的影响。 当AGC增益更新定时的移位量被设置为大于接收信号的一个符号的移位量时，进一步降低伴随AGC增益更新的噪声的影响。

公开(公告)号：US07403757B2

公开(公告)日：2008-07-22

申请号：US11223067

申请日：2005-09-08

Applicant: Heejung Yu ,  Taehyun Jeon ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

Inventor： Heejung Yu ,  Taehyun Jeon ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

IPC: H04B1/06

CPC classification number: H03G3/30 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302

Abstract: The present invention relates to an automatic gain controller in a wireless packet communication system and an automatic gain control method thereof. The automatic gain controller includes a variable gain amplifier, a signal saturation determining unit, a power calculator, and a gain controller. The gain controller includes a first gain selector and a second gain selector. In the automatic gain control method, an establishment gain of a variable gain amplifier is reduced when the number of samples greater than a predetermined reference is greater than a predetermined number. After a received power value is measured, the establishment gain is controlled by a difference between the received power value and a reference power value.

Abstract translation: 本发明涉及一种无线分组通信系统中的自动增益控制器及其自动增益控制方法。 自动增益控制器包括可变增益放大器，信号饱和确定单元，功率计算器和增益控制器。 增益控制器包括第一增益选择器和第二增益选择器。 在自动增益控制方法中，当大于预定参考值的采样数大于预定数量时，减小可变增益放大器的建立增益。 在测量接收功率值之后，通过接收功率值和参考功率值之间的差来控制建立增益。

公开(公告)号：US07196582B2

公开(公告)日：2007-03-27

申请号：US10977798

申请日：2004-10-29

Applicant: Hooman Darabi ,  Janice Chiu

Inventor： Hooman Darabi ,  Janice Chiu

IPC: H03G3/10

CPC classification number: H03G1/007 ,  H03G3/3063 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/307

Abstract: Methods and systems for processing signals are disclosed herein. In one aspect of the invention a circuit for processing signals may comprise a triple well (TW) NMOS transistor coupled to an amplifier core. The TW NMOS transistor may track process and temperature variations (PVT) of at least one NMOS transistor within the amplifier core. A drain of the TW NMOS transistor may be coupled to a first inductor and the first inductor may be coupled to a first voltage source. The first voltage source may generate a standard voltage of about 1.2V. A source of the TW NMOS transistor may be coupled to a second inductor and the second inductor may be coupled to the first voltage source. A gate of the TW NMOS transistor may be coupled to a second voltage source, where the second voltage source may generate a standard voltage of about 2.5V.

Abstract translation: 本文公开了用于处理信号的方法和系统。 在本发明的一个方面，用于处理信号的电路可以包括耦合到放大器芯的三阱（TW）NMOS晶体管。 TW NMOS晶体管可跟踪放大器核心内的至少一个NMOS晶体管的工艺和温度变化（PVT）。 TW NMOS晶体管的漏极可以耦合到第一电感器，并且第一电感器可以耦合到第一电压源。 第一电压源可产生约1.2V的标准电压。 TW NMOS晶体管的源极可以耦合到第二电感器，并且第二电感器可以耦合到第一电压源。 TW NMOS晶体管的栅极可以耦合到第二电压源，其中第二电压源可以产生约2.5V的标准电压。

公开(公告)号：US20060217090A1

公开(公告)日：2006-09-28

申请号：US11087704

申请日：2005-03-24

Applicant: Meng-An Pan

Inventor： Meng-An Pan

IPC: H04M1/00

CPC classification number: H04B1/0003 ,  H03F1/0261 ,  H03F3/45188 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/307 ,  H03G2201/40 ,  H04B1/0475

Abstract: A transmitter includes a dual mode modulator and an amplifier coupled to the dual mode modulator. The dual mode modulator implements a linear modulation scheme during a first mode of the modulator to produce a variable envelope modulated signal. The dual mode modulator implements a non-linear modulation scheme during a second mode of the modulator to produce a constant envelope modulated signal. The amplifier is biased as a linear amplifier during the first mode of the modulator and is biased as a non-linear amplifier during the second mode of the modulator. A feed-forward connection between the dual mode modulator and the amplifier is used to indicate a change in modulation mode and to adjust the bias of the amplifier. A power of the constant envelope modulated signal is increased such that an operating point of the amplifier remains substantially constant during the first and second modes of the modulator.

公开(公告)号：US07103336B1

公开(公告)日：2006-09-05

申请号：US09654274

申请日：2000-09-01

Applicant: Yoshinori Miyajima ,  Atsuhiko Hashigaya

Inventor： Yoshinori Miyajima ,  Atsuhiko Hashigaya

IPC: H04B1/06 ,  H04L27/08

CPC classification number: H04B1/1027 ,  H03G3/3052 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/307 ,  H03G2201/706 ,  H04B17/318

Abstract: The AGC threshold of electric intensity level is set by the signal processor portion 107 in response to the measured result of the error rate measuring circuit 109 that measures the error rate of the received signal, and the gain control operation of the gain control circuit 106 is caused to start when the electric field intensity detected by the field intensity detector 105 reaches the threshold of electric intensity level. Accordingly, the optimum AGC threshold of electric intensity level can be set to meet the radio wave situation in which the radio receiver, i.e., the receiving situation of the received signal and also the gain control of the gain controlling means can be achieved to optimize the signal quality of the received signal in the situation of either the IM characteristic or the electric field variation characteristic, e.g., under the environment of the strong electric field IM or the environment in which the electric field is changed strongly.

Abstract translation: 响应于测量接收信号的误码率的误差率测量电路109的测量结果，由信号处理器部分107设置电强度电平的AGC阈值，并且增益控制电路106的增益控制操作是 当由场强检测器105检测到的电场强度达到电强度水平的阈值时开始启动。 因此，可以设置电强度级的最佳AGC阈值以满足无线电接收机的无线电波情况，即接收信号的接收状况，以及增益控制装置的增益控制可以实现， 在IM特性或电场变化特性的情况下，例如在强电场IM的环境或电场强烈变化的环境下，接收信号的信号质量。

公开(公告)号：US20060121867A1

公开(公告)日：2006-06-08

申请号：US11223067

申请日：2005-09-08

Applicant: Heejung Yu ,  Taehyun Jeon ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

Inventor： Heejung Yu ,  Taehyun Jeon ,  Myung-Soon Kim ,  Eun-Young Choi ,  Sok-Kyu Lee ,  Deuk-Su Lyu

IPC: H04B1/06

CPC classification number: H03G3/30 ,  H03G2201/103 ,  H03G2201/202 ,  H03G2201/302

Abstract: The present invention relates to an automatic gain controller in a wireless packet communication system and an automatic gain control method thereof. The automatic gain controller includes a variable gain amplifier, a signal saturation determining unit, a power calculator, and a gain controller. The gain controller includes a first gain selector and a second gain selector. In the automatic gain control method, an establishment gain of a variable gain amplifier is reduced when the number of samples greater than a predetermined reference is greater than a predetermined number. After a received power value is measured, the establishment gain is controlled by a difference between the received power value and a reference power value.

Abstract translation: 本发明涉及一种无线分组通信系统中的自动增益控制器及其自动增益控制方法。 自动增益控制器包括可变增益放大器，信号饱和确定单元，功率计算器和增益控制器。 增益控制器包括第一增益选择器和第二增益选择器。 在自动增益控制方法中，当大于预定参考值的采样数大于预定数量时，减小可变增益放大器的建立增益。 在测量接收功率值之后，通过接收功率值和参考功率值之间的差来控制建立增益。