-
公开(公告)号：US20230253936A1
公开(公告)日：2023-08-10
申请号：US18161473
申请日：2023-01-30
IPC分类号： H03F3/24 , H03K17/687 , H03H11/04
CPC分类号： H03F3/245 , H03H11/04 , H03K17/687 , H03F2200/451
摘要： The present disclosure relates to a radio frequency circuit comprising a linearizer circuit. The linearizer circuit may comprise a first capacitor and a second capacitor arranged in parallel. The first capacitor may have a positive third order derivative of charge with respect to voltage. The second capacitor may have a negative third order derivative of charge with respect to voltage. Related radio frequency modules and wireless communication devices are also disclosed.
-
公开(公告)号：US20220393655A1
公开(公告)日：2022-12-08
申请号：US17805717
申请日：2022-06-07
摘要： According to at least one example of the disclosure, a power amplifier is provided comprising a first power switch of a first type being configured to receive an input signal and provide an amplified output signal to an output connection configured to be coupled to a load, and a second power switch of a second type different than the first type, the second power switch being configured to improve a linearity of the power amplifier and being coupled to the output connection.
-
公开(公告)号：US11165514B2
公开(公告)日：2021-11-02
申请号：US16946844
申请日：2020-07-08
发明人： Florinel G. Balteanu , Yu Zhu , Paul T. DiCarlo
IPC分类号： H04B17/12 , H04B17/21 , H04B17/14 , H04B17/327 , H04B17/364
摘要： Apparatus and methods for envelope alignment calibration in radio frequency (RF) systems are provided. In certain embodiments, calibration is performed by providing an envelope signal with a peak along an envelope path, and by providing an RF signal with a first peak and a second peak to a power amplifier along an RF signal path. Additionally, an output of the power amplifier is observed to generate an observation signal using an observation receiver. The observation signal includes a first peak and a second peak corresponding to the first peak and the second peak of the RF signal, and a delay between the envelope signal and the RF signal is controlled based on relative size of the peaks of the observation signal to one another.
-
公开(公告)号：US20210028870A1
公开(公告)日：2021-01-28
申请号：US16946844
申请日：2020-07-08
发明人： Florinel G. Balteanu , Yu Zhu , Paul T. DiCarlo
IPC分类号： H04B17/12 , H04B17/21 , H04B17/364 , H04B17/327 , H04B17/14
摘要： Apparatus and methods for envelope alignment calibration in radio frequency (RF) systems are provided. In certain embodiments, calibration is performed by providing an envelope signal with a peak along an envelope path, and by providing an RF signal with a first peak and a second peak to a power amplifier along an RF signal path. Additionally, an output of the power amplifier is observed to generate an observation signal using an observation receiver. The observation signal includes a first peak and a second peak corresponding to the first peak and the second peak of the RF signal, and a delay between the envelope signal and the RF signal is controlled based on relative size of the peaks of the observation signal to one another.
-
公开(公告)号：US20210028800A1
公开(公告)日：2021-01-28
申请号：US16946835
申请日：2020-07-08
发明人： Florinel G. Balteanu , Yu Zhu , Paul T. DiCarlo
摘要： Apparatus and methods for envelope controlled radio frequency (RF) switches are provided. In certain embodiments, a power amplifier provides an RF signal to an antenna by way of an RF switch. Additionally, the envelope signal is used not only to control a power amplifier supply voltage of the power amplifier, but also to control a regulated voltage used to turn on the RF switch. For example, a level shifter can use a regulated voltage from charge pump circuitry to turn on the RF switch, and the envelope signal can be provided to the charge pump circuitry and used to control the voltage level of the regulated voltage over time.
-
公开(公告)号：US10574191B2
公开(公告)日：2020-02-25
申请号：US16221966
申请日：2018-12-17
IPC分类号： H04B1/04 , H03F3/45 , H03F1/32 , H03F3/24 , H03F3/193 , H03F3/19 , H04B1/48 , H03F1/02 , H03F3/195 , H03F3/21 , H04B1/40 , H04B1/3827 , H04B1/525 , H04W88/02
摘要： A linearization circuit reduces intermodulation distortion in an amplifier that includes a first stage and a second stage. The linearization circuit receives a first signal that includes a first frequency and a second frequency and generates a difference signal having a frequency approximately equal to the difference of the first frequency and the second frequency, generates an envelope signal based at least in part on a power level of the first signal, and adjusts a magnitude of the difference signal based on the envelope signal. When the amplifier receives the first signal at an input terminal, the first stage receives the adjusted signal, and the second stage does not receive the adjusted signal, intermodulation between the adjusted signal and the first signal cancels at least a portion of the intermodulation between the first frequency and the second frequency from the output of the amplifier.
-
公开(公告)号：US20190190462A1
公开(公告)日：2019-06-20
申请号：US16225912
申请日：2018-12-19
发明人： Yu Zhu , Boshi Jin , Steven Christopher Sprinkle , Florinel G. Balteanu , Oleksiy Klimashov , Dylan Charles Bartle , Paul T. DiCarlo
IPC分类号： H03F1/32 , H03F3/193 , H03F3/45 , H04B1/40 , H04B1/3827 , H04B1/525 , H03F3/19 , H03F1/02 , H03F3/195 , H03F3/21 , H04B1/48 , H03F3/24
CPC分类号： H03F1/3205 , H03F1/0266 , H03F1/32 , H03F3/19 , H03F3/193 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/4508 , H03F3/45179 , H03F2200/102 , H03F2200/105 , H03F2200/15 , H03F2200/294 , H03F2200/451 , H03F2201/3215 , H03F2201/3236 , H04B1/3827 , H04B1/40 , H04B1/48 , H04B1/525 , H04B2001/485 , H04W88/02
摘要： A linearization circuit that reduces intermodulation distortion in an amplifier output receives a first signal that includes a first frequency and a second frequency and generates a difference signal having a frequency approximately equal to the difference of the first frequency and the second frequency. The linearization circuit generates an envelope signal based at least in part on a power level of the first signal and adjusts a magnitude of the difference signal based on the envelope signal. When the amplifier receives the first signal at an input terminal and the adjusted signal at a second terminal, intermodulation between the adjusted signal and the first signal cancels at least a portion of the intermodulation products that result from the intermodulation of the first frequency and the second frequency.
-
公开(公告)号：US10263614B2
公开(公告)日：2019-04-16
申请号：US15970527
申请日：2018-05-03
发明人： Yu Zhu , Oleksiy Klimashov , Dylan Charles Bartle
IPC分类号： H04B1/44 , H03K17/16 , H04L25/02 , H03K19/00 , H03K17/693 , H03K17/06 , H04B1/3827
摘要： In semiconductor switches, the isolation can be limited by the capacitive coupling between the switch input and the switch output. Ultra-high isolation can be achieved by adding a coupled transmission line to the semiconductor switch. The coupled transmission line introduces inductive coupling, which cancels at least a part of the capacitive coupling between the switch input and the switch output.
-
公开(公告)号：US20180331657A1
公开(公告)日：2018-11-15
申请号：US15948889
申请日：2018-04-09
IPC分类号： H03F1/02 , H03K17/16 , H03F1/22 , H03F3/193 , H03F3/217 , H03F3/24 , G10H1/057 , H03K17/693 , H03K17/10 , H03K17/0812 , H04B1/04 , H03K17/284 , H02M1/00
CPC分类号： H03F1/0222 , G10H1/057 , H02M2001/0045 , H03F1/22 , H03F3/193 , H03F3/2171 , H03F3/245 , H03F2200/102 , H03F2200/336 , H03F2203/7236 , H03F2203/7239 , H03K17/08122 , H03K17/102 , H03K17/162 , H03K17/284 , H03K17/693 , H03K2217/0054 , H04B1/04 , H04B2001/0408 , H04B2001/045
摘要： Aspects of this disclosure relate to a radio frequency system that includes an envelope generator configured to generate an envelope signal corresponding to an envelope of a radio frequency signal and at least two radio frequency components coupled to the envelope generator. One of the radio frequency components is a radio frequency switch configured to pass the radio frequency signal. The radio frequency switch is configured to receive the envelope signal to cause intermodulation distortion associated with the radio frequency switch to be reduced.
-
公开(公告)号：US09991885B2
公开(公告)日：2018-06-05
申请号：US15585520
申请日：2017-05-03
发明人： Yu Zhu , Oleksiy Klimashov , Dylan Charles Bartle
IPC分类号： H04B1/44 , H03K17/16 , H04L25/02 , H03K19/00 , H03K17/693 , H03K17/06 , H04B1/3827
CPC分类号： H03K17/162 , H03K17/693 , H03K19/00 , H03K2017/066 , H04B1/3827 , H04B1/44 , H04L25/0266
摘要： Semiconductor switches in portable transceivers switch between outgoing and incoming radio frequency signal paths. The isolation can be limited by the capacitive coupling between the switch input and the switch output. Ultra-high isolation can be achieved by adding a coupled transmission line to the semiconductor switch. The coupled transmission line introduces inductive coupling, which cancels at least a part of the capacitive coupling between the switch input and the switch output.
-
-
-
-
-
-
-
-
-
搜索结果
68 条记录 (耗时 0.031 秒)
