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

IPC: H04B1/10 ,  H04B1/00 ,  H03H11/04 ,  H03F3/19

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.

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

IPC: H04B1/00 ,  H04B1/10 ,  H03H11/04

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.

公开(公告)号：US10193497B2

公开(公告)日：2019-01-29

申请号：US15831370

申请日：2017-12-04

Applicant: QUALCOMM Incorporated

Inventor： Xinmin Yu ,  Timothy Donald Gathman ,  Lai Kan Leung

IPC: H03D7/14 ,  H04B1/26

Abstract: Methods, systems, and devices for wireless communication are described for enhanced broadband operation of an active mixer. In an example, an apparatus may include an active mixer that converts between radio frequency (RF) signals and intermediate frequency (IF) signals based at least in part on an alternating current (AC) local oscillator (LO) signal, wherein a direct current (DC) current generated within the active mixer is dependent in part on a bias voltage and the AC LO signal. The apparatus may include a mixer biasing circuit that generates the bias voltage for the active mixer, a magnitude of the bias voltage having an inverse relationship to an amplitude of the AC LO signal.

公开(公告)号：US09640532B2

公开(公告)日：2017-05-02

申请号：US14476086

申请日：2014-09-03

Applicant: QUALCOMM Incorporated

Inventor： Timothy Donald Gathman

IPC: H01L27/06 ,  H01L27/08 ,  H01L29/94 ,  H01L29/93 ,  H03K17/687

CPC classification number: H01L27/0808 ,  H01L23/5223 ,  H01L27/0805 ,  H01L28/86 ,  H01L29/93 ,  H01L29/94 ,  H01L2924/0002 ,  H03K17/687 ,  H01L2924/00

Abstract: A device includes a first stacked capacitor comprising a first MOS capacitance and a first MOM capacitance, the first MOS capacitance coupled to a first node, the first node configured to receive a first bias voltage, and a second stacked capacitor comprising a second MOS capacitance and a second MOM capacitance, the second MOS capacitance coupled to the first node.

公开(公告)号：US09124246B2

公开(公告)日：2015-09-01

申请号：US14037116

申请日：2013-09-25

Applicant: QUALCOMM Incorporated

Inventor： Li-Chung Chang ,  Bindu Gupta ,  Timothy Donald Gathman ,  Ibrahim Ramez Chamas

IPC: H03F3/45 ,  H03H11/04 ,  H03F1/02 ,  H03F1/08 ,  H03F1/22 ,  H03F3/193 ,  H03F3/72

CPC classification number: H03H11/0466 ,  H03F1/0277 ,  H03F1/08 ,  H03F1/223 ,  H03F3/193 ,  H03F3/45183 ,  H03F3/45475 ,  H03F3/45932 ,  H03F3/72 ,  H03F2200/06 ,  H03F2200/09 ,  H03F2200/165 ,  H03F2200/168 ,  H03F2200/171 ,  H03F2200/294 ,  H03F2200/336 ,  H03F2200/411 ,  H03F2200/429 ,  H03F2200/432 ,  H03F2200/534 ,  H03F2200/541 ,  H03F2200/543 ,  H03F2203/45352 ,  H03F2203/45396 ,  H03F2203/45506 ,  H03F2203/45511 ,  H03F2203/45512 ,  H03F2203/45516 ,  H03F2203/45521 ,  H03F2203/45522 ,  H03F2203/45526 ,  H03F2203/45528 ,  H03F2203/45594 ,  H03F2203/45618 ,  H03F2203/45702 ,  H03F2203/45728 ,  H03F2203/7215 ,  H03F2203/7221 ,  H03F2203/7236 ,  H03H2210/021 ,  H03H2250/00

Abstract: Techniques for designing baseband processing circuitry for radio IC's. In an aspect, techniques for differential-to-single-ended conversion in a baseband portion of the IC are disclosed to reduce the pin count and package size for RF IC's. In another aspect, the converter includes selectable narrowband and wideband amplifiers, wherein the wideband amplifiers may be implemented using transistor devices having smaller area than corresponding transistor devices of narrowband amplifiers. Further techniques for bypassing one or more elements, and for implementing a low-pass filter of the converter using an R-C filter network, are described.

Abstract translation: 无线电IC基带处理电路设计技术。 在一方面，公开了用于IC的基带部分中的差分到单端转换的技术，以减少RF IC的引脚数和封装尺寸。 在另一方面，转换器包括可选择的窄带和宽带放大器，其中宽带放大器可以使用具有比窄带放大器的相应晶体管器件小的面积的晶体管器件来实现。 描述了用于绕过一个或多个元件以及用于使用R-C滤波器网络来实现转换器的低通滤波器的进一步的技术。