公开(公告)号：US20150372701A1

公开(公告)日：2015-12-24

申请号：US14744142

申请日：2015-06-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wufeng WANG ,  Min YI ,  Nianyong ZHU ,  Bingxuan MO

IPC: H04B1/04 ,  H04L7/033 ,  H04B7/01

CPC classification number: H04B1/0475 ,  H03L7/00 ,  H04L7/0331 ,  H04L7/0337 ,  H04L27/2092 ,  H04L27/364 ,  H04L27/365

Abstract: The present invention relates to a modulation circuit of a digital transmitter, a digital transmitter, and a signal modulation method. The modulation circuit includes: a first synchronizing circuit and a digital modulator, where the first synchronizing circuit separately perform phase delay on a first local-frequency signal or a second local-frequency signal to obtain corresponding delay signals, and perform phase adjustment on a digital baseband signal by using the delay signals, to generate a first adjusted signal and a second adjusted signal; and the digital modulator modulates the first adjusted signal by using the first local-frequency signal, to generate a first radio-frequency signal, and modulates the second adjusted signal by using the second local-frequency signal, to generate a second radio-frequency signal.

Abstract translation: 本发明涉及数字发射机的调制电路，数字发射机和信号调制方法。 调制电路包括：第一同步电路和数字调制器，其中第一同步电路在第一本地频率信号或第二本地频率信号上分别执行相位延迟以获得相应的延迟信号，并对数字 基带信号通过使用延迟信号产生第一调整信号和第二调整信号; 并且所述数字调制器通过使用所述第一本机频率信号来调制所述第一调整信号，以产生第一射频信号，并且通过使用所述第二本机频率信号对所述第二调整信号进行调制，以产生第二射频信号 。

公开(公告)号：US20220263470A1

公开(公告)日：2022-08-18

申请号：US17733359

申请日：2022-04-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yongchang YU ,  Min YI ,  Weinan LI

IPC: H03F1/02 ,  H03F3/45

Abstract: This application provides an operational amplifier and a start-up circuit of the operational amplifier. The start-up circuit has advantages of simple structure and low power consumption. The operational amplifier includes a multi-stage amplifier and a start-up circuit, where the start-up circuit includes: a first start-up transistor M16 and a second start-up transistor M17, a source of the first start-up transistor M16 and a source of the second start-up transistor M17 are connected to a tail bias node of a first-stage amplifier in the multi-stage amplifier, a gate of the first start-up transistor M16 and a gate of the second start-up transistor M17 are configured to connect to a first bias voltage Vb, and a drain of the first start-up transistor M16 and a drain of the second start-up transistor M17 are connected to input terminals of a second-stage or higher-stage amplifier.

公开(公告)号：US20220294403A1

公开(公告)日：2022-09-15

申请号：US17828617

申请日：2022-05-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yongchang YU ,  Min YI ,  Weinan LI

IPC: H03F3/45

Abstract: This application provides an operational amplifier that increases the stability and settling speed of a common-mode feedback circuit. The operational amplifier includes N stages of amplifiers connected in series and M common-mode feedback circuits, where N and M are integers, N≥3, and N≥M>1. An ith common-mode feedback circuit in the M common-mode feedback circuits is configured to: detect a common-mode output voltage of a (j+b)th stage of amplifier, and regulate an electrical parameter of at least one of the jth stage of amplifier to the (j+b)th stage of amplifier, to stabilize the common-mode output voltage of the (j+b)th stage of amplifier. An Mth common-mode feedback circuit is configured to detect and stabilize a common-mode output voltage of an Nth stage of amplifier. Herein i, j, and b are integers, M≥i≥1, N≥j≥1, i≥j, j+b≤N, and b≥0.

公开(公告)号：US20160043822A1

公开(公告)日：2016-02-11

申请号：US14821464

申请日：2015-08-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Min YI ,  Jian LIANG ,  Nianyong ZHU

IPC: H04J1/12 ,  H04B1/12

CPC classification number: H04J1/12 ,  H04B1/0057 ,  H04B1/006 ,  H04B1/126 ,  H04W88/06

Abstract: The present invention discloses a radio frequency receiver and a receiving method, where the method includes: performing band splitting on a radio frequency signal of multiple carriers to obtain at least one band signal, and outputting the signal; separately performing filtering and amplification processing on the at least one band signal to obtain at least one processed signal; generating multiple oscillation signals; and selectively receiving a processed signal, of the at least one processed signal, that includes a target carrier; receiving an oscillation signal corresponding to the target carrier; selectively selecting a frequency division ratio from multiple frequency division ratios; using the frequency division ratio to perform frequency division on the received oscillation signal to obtain a local oscillator signal; using the local oscillator signal to perform frequency mixing on the received processed signal that includes the target carrier to obtain a mixed signal.

Abstract translation: 本发明公开了一种射频接收机和接收方法，其特征在于，该方法包括：对多个载波的射频信号进行频带分割，得到至少一个频带信号，输出该信号; 对所述至少一个频带信号分别执行滤波和放大处理以获得至少一个处理的信号; 产生多个振荡信号; 以及选择性地接收包括目标载体的所述至少一个已处理信号的已处理信号; 接收对应于目标载波的振荡信号; 从多个分频比选择选择分频比; 使用分频比对接收到的振荡信号进行分频以获得本地振荡器信号; 使用本地振荡器信号对包含目标载波的接收到的处理信号进行混频以获得混合信号。