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公开(公告)号：US20150056940A1
公开(公告)日：2015-02-26
申请号：US13974631
申请日：2013-08-23
Applicant: QUALCOMM Incorporated
Inventor： Rajagopalan Rangarajan , Chirag Dipak Patel
CPC classification number: H04B1/10 , H03F1/3205 , H03F1/565 , H03F3/19 , H03F3/601 , H03F2200/111 , H03F2200/246 , H03F2200/255 , H03F2200/294 , H03F2200/451 , H03F2200/495 , H03F2200/501 , H03F2200/543
Abstract: A circuit, a method and an apparatus, are described. A radio frequency (RF) signal received from a transmission line is provided to the source of a transistor in a common-gate amplification circuit. A series resonance connected to the source provides a low impedance path to ground for interfering RF components in the RF signal. The series resonance is tuned to provide a high impedance to a band of frequencies centered on a frequency of interest and to shunt interfering RF components outside the band of frequencies centered on the frequency of interest. The interfering RF components may include a harmonic of the frequency of interest.
Abstract translation: 描述了电路，方法和装置。 从传输线接收的射频（RF）信号被提供给共栅放大电路中的晶体管的源极。 连接到源极的串联谐振器为RF信号中的RF部件提供了一个低阻抗接地路径。 串联谐振被调谐以向以感兴趣的频率为中心的频率带提供高阻抗，并且在感兴趣的频率为中心的频率带之外分流干扰的RF分量。 干扰RF分量可以包括感兴趣频率的谐波。
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公开(公告)号：US11569555B2
公开(公告)日：2023-01-31
申请号：US16785440
申请日：2020-02-07
Applicant: Qualcomm Incorporated
Inventor： Chirag Dipak Patel , Xinmin Yu , Lai Kan Leung
Abstract: An apparatus is disclosed for phase-shifting signals. In example implementations, the apparatus includes a phase shifter. The phase shifter includes a first port, a second port, a vector modulator coupled to the first port, and a signal phase generator. The signal phase generator includes multiple amplifiers coupled between the vector modulator and the second port. The signal phase generator also includes multiple capacitors that couple the multiple amplifiers together to form a loop. Each respective capacitor of the multiple capacitors is coupled between a respective pair of consecutive amplifiers of the multiple amplifiers to form the loop.
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公开(公告)号：US20220311423A1
公开(公告)日：2022-09-29
申请号：US17211716
申请日：2021-03-24
Applicant: Qualcomm Incorporated
Inventor： Timothy Donald Gathman , Lai Kan Leung , Chirag Dipak Patel , Xinmin Yu , Rajagopalan Rangarajan
IPC: H03H11/22
Abstract: An example apparatus includes a polyphase transconductance-capacitor filter. The polyphase filter includes a DC bias voltage node, a plus in-phase filter unit, a minus in-phase filter unit, a plus quadrature-phase filter unit, and a minus quadrature-phase filter unit. Each filter unit respectively includes an input node, an output node, and a control node. The polyphase filter also includes a plus in-phase switch and a minus in-phase switch. The plus in-phase switch is coupled to the control node of the plus in-phase filter unit, the DC bias voltage node, and the input node of one or both of the plus quadrature-phase filter unit and the minus quadrature-phase filter unit. The minus in-phase switch is coupled to the control node of the minus in-phase filter unit, the DC bias voltage node, and the input node of one or both of the plus quadrature-phase filter unit and the minus quadrature-phase filter unit.
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公开(公告)号：US11349503B2
公开(公告)日：2022-05-31
申请号：US17001568
申请日：2020-08-24
Applicant: Qualcomm Incorporated
Inventor： Laya Mohammadi , Chirag Dipak Patel , Bhushan Shanti Asuri
Abstract: An apparatus is disclosed for phase-shifting signals with a compensation circuit. In example implementations, an apparatus for phase-shifting signals includes a phase shifter having a first port and a second port. The phase shifter also includes a signal phase generator, a compensation circuit, and a vector modulator. The compensation circuit includes a first capacitor with a first capacitance and a second capacitor with a second capacitance. The first capacitance is different from the second capacitance. The signal phase generator is coupled between the first port and the compensation circuit. The vector modulator is coupled between the compensation circuit and the second port.
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Patent Agency Ranking
公开(公告)号：US11316489B2
公开(公告)日：2022-04-26
申请号：US16557974
申请日：2019-08-30
Applicant: Qualcomm Incorporated
Inventor： Chirag Dipak Patel , Xinmin Yu , Lai Kan Leung
Abstract: An apparatus is disclosed for bidirectional variable gain amplification. In an example aspect, an apparatus comprises an antenna element of an antenna array and a wireless transceiver. The wireless transceiver comprises a transmit path coupled to the antenna element, a receive path coupled to the antenna element, and a phase shifter disposed in both the transmit path and the receive path. The phase shifter is configured to operate in an active mode and comprises a first bidirectional variable gain amplifier and a second bidirectional variable gain amplifier.
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公开(公告)号：US20210067118A1
公开(公告)日：2021-03-04
申请号：US16557974
申请日：2019-08-30
Applicant: Qualcomm Incorporated
Inventor： Chirag Dipak Patel , Xinmin Yu , Lai Kan Leung
Abstract: An apparatus is disclosed for bidirectional variable gain amplification. In an example aspect, an apparatus comprises an antenna element of an antenna array and a wireless transceiver. The wireless transceiver comprises a transmit path coupled to the antenna element, a receive path coupled to the antenna element, and a phase shifter disposed in both the transmit path and the receive path. The phase shifter is configured to operate in an active mode and comprises a first bidirectional variable gain amplifier and a second bidirectional variable gain amplifier.
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公开(公告)号：US20200052729A1
公开(公告)日：2020-02-13
申请号：US16058944
申请日：2018-08-08
Applicant: Qualcomm Incorporated
Inventor： Timothy Donald Gathman , Chirag Dipak Patel , Lai Kan Leung
Abstract: An apparatus is disclosed for current-mode filtering using current steering. In an example aspect, the apparatus includes a filter. The filter includes a current-steering node, a first output node, a second output node, a wideband path, and a narrowband path. The wideband path is coupled between the current-steering node and the first output node. The wideband path includes a wideband low-pass filter configured to pass frequencies within a wide passband. The narrowband path is coupled between the current-steering node and the second output node. The narrowband path includes a narrowband low-pass filter configured to pass a portion of the frequencies that are within a narrow passband.
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公开(公告)号：US10305517B1
公开(公告)日：2019-05-28
申请号：US16028247
申请日：2018-07-05
Applicant: Qualcomm Incorporated
Inventor： Timothy Donald Gathman , Chirag Dipak Patel , Lai Kan Leung
Abstract: An apparatus is disclosed for current-mode filtering with switching. In an example aspect, the apparatus includes a filter including two input nodes, two output nodes, two differential paths, two bypass nodes respectively coupled between the two input nodes and the two output nodes along the two differential paths, a high-pass filter coupled between the two bypass nodes and the two output nodes, two low-pass switches, a band-pass switch, and a low-pass filter coupled in series with the high-pass filter along the two differential paths. The high-pass filter includes two series capacitors, which are respectively coupled between the two bypass nodes and the two output nodes, and two shunt inductors, which are respectively coupled to the two bypass nodes. The two low-pass switches are respectively coupled in parallel with the two series capacitors. The band-pass switch is coupled in series between the two shunt inductors.
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公开(公告)号：US10033337B2
公开(公告)日：2018-07-24
申请号：US15287674
申请日：2016-10-06
Applicant: QUALCOMM Incorporated
Inventor： Chirag Dipak Patel , Sasha Vujcic , Aleksandar Miodrag Tasic , Timothy Gathman , Wu-Hsin Chen , Klaas Van Zalinge
Abstract: A multi-stage low-noise amplifier (LNA) device with a band pass response includes a first LNA in series with a second LNA. The device further includes multiple outputs coupled to the second LNA. Each of the outputs is capable of being active at the same time. The device further includes a high pass filter coupled between the first LNA and the second LNA.
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