公开(公告)号：US20180076765A1

公开(公告)日：2018-03-15

申请号：US15638183

申请日：2017-06-29

Applicant: QUALCOMM Incorporated

Inventor： Mazhareddin TAGHIVAND ,  Alireza KHALILI ,  Mohammad EMADI ,  Yashar RAJAVI

IPC: H03B1/04 ,  H03B5/12

CPC classification number: H03B1/04 ,  H03B5/1212 ,  H03B5/1228 ,  H03B5/124 ,  H03B27/00 ,  H03B2200/0054 ,  H03B2200/007 ,  H03B2200/009

Abstract: Certain aspects of the present disclosure provide methods and apparatus for reducing phase noise in voltage-controlled oscillators (VCOs). One example VCO generally includes a first resonant circuit comprising an inductor and a first variable capacitive element coupled in parallel with the inductor; and a second variable capacitive element coupled to a center tap of the inductor and further coupled to a reference voltage, wherein the center tap of the inductor is further coupled to a voltage source.

公开(公告)号：US20170325169A1

公开(公告)日：2017-11-09

申请号：US15448152

申请日：2017-03-02

Applicant: QUALCOMM Incorporated

Inventor： Mohammad EMADI ,  Alireza KHALILI ,  Mazhareddin TAGHIVAND ,  Youhan KIM ,  Kai DIETZE ,  Michael KOHLMANN ,  James GARDNER ,  Tevfik YUCEK ,  Beomsup KIM

IPC: H04W52/02 ,  H04B17/318 ,  H04W84/12

CPC classification number: H04W52/0245 ,  H04B17/318 ,  H04W84/12 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/164 ,  Y02D70/22

Abstract: Power conservation in a radio frequency front end of a user equipment (UE) during wireless local area network (WLAN) communication is achieved by adjusting a power mode of the radio frequency front end. In one instance, the UE determines a signal strength of a received frame of a packet during a short training field of a preamble of the received frame. The determining occurs when a WLAN receiver is operating in a low power mode. The UE then switches the WLAN receiver to a high power mode during the short training field of the preamble or during a first segment of a long training field of the preamble when the signal strength is above a predetermined signal strength.