公开(公告)号：US20200266791A1

公开(公告)日：2020-08-20

申请号：US16275574

申请日：2019-02-14

Applicant: QUALCOMM Incorporated

Inventor： Haitao CHENG ,  Yanming XIAO ,  Wu-Hsin CHEN ,  Li LIU ,  Masoud MOSLEHI BAJESTAN

IPC: H03H7/01

Abstract: A low-pass filter having a notch frequency due to a resonance between a mutual inductance of inductive elements and a capacitance. An exemplary low-pass filter generally includes a first inductive element having a first terminal and a second terminal, the first terminal being coupled to the input port, and a second inductive element having a first terminal and a second terminal, the first terminal of the second inductive element being coupled to the second terminal of the first inductive element and the second terminal of the second inductive element being coupled to the output port. The filter also includes a shunt capacitive element coupled to the second terminal of the first inductive element, wherein a mutual inductance between the first inductive element and the second inductive element and a capacitance of the shunt capacitive element are configured to have a resonance providing a notch frequency for the low-pass filter.

公开(公告)号：US20170244361A1

公开(公告)日：2017-08-24

申请号：US15048460

申请日：2016-02-19

Applicant: QUALCOMM Incorporated

Inventor： Mohammad FARAZIAN ,  Masoud MOSLEHI BAJESTAN

IPC: H03B5/12

CPC classification number: H03B5/1228 ,  H03B5/1212 ,  H03B5/1265 ,  H03B5/1268 ,  H03B5/1841 ,  H03B5/1852 ,  H03B2200/0016 ,  H03B2201/025

Abstract: Certain aspects of the present disclosure generally relate to a voltage-controlled oscillator (VCO) that is configurable (e.g., in a dynamic manner) in multiple modes of operation (e.g., low/high-band modes). The VCO may include a resonant circuit coupled to a plurality of switches that may be used to adjust current flow within one or more inductive elements of the resonant circuit. By adjusting the current flow within the inductive elements, an inductance of the resonant circuit may be adjusted, which in turn adjusts a band of the VCO.

公开(公告)号：US20220190833A1

公开(公告)日：2022-06-16

申请号：US17117240

申请日：2020-12-10

Applicant: QUALCOMM INCORPORATED

Inventor： Masoud MOSLEHI BAJESTAN ,  Giovanni MARUCCI ,  Dongmin PARK ,  Marco ZANUSO ,  Yiwu TANG

IPC: H03L7/093 ,  H03K3/037 ,  H03M3/00

Abstract: A phase-locked loop (PLL) may include a phase-frequency detector (PFD), a phase interpolation (PI)-based sampler, a loop filter, a voltage-controlled oscillator (VCO), and a fractional frequency divider. The PFD output corresponds to a phase error between a reference clock signal and a feedback signal. The PI-based sampler produces a slope signal in response to the PFD output, and adjusts the slope signal in response to a quantization error correction indication. The PI-based sampler also samples the slope signal. The loop filter produces a VCO control signal in response to a sampled slope signal. The VCO control signal controls the VCO frequency. The fractional frequency divider circuit divides the frequency of the VCO output signal and also determines the quantization error correction corresponding to the quantization error introduced by fractional division of the frequency of the VCO output signal.

公开(公告)号：US20240313792A1

公开(公告)日：2024-09-19

申请号：US18185325

申请日：2023-03-16

Applicant: QUALCOMM Incorporated

Inventor： Masoud MOSLEHI BAJESTAN ,  Arpit GUPTA ,  Wu-Hsin CHEN ,  Vinod PANIKKATH

IPC: H03L7/099 ,  H03L1/02 ,  H03L7/087

CPC classification number: H03L7/0992 ,  H03L1/021 ,  H03L7/087

Abstract: In certain aspects, a system includes a voltage-controlled oscillator (VCO), a phase detector configured to receive a reference signal, a frequency divider coupled between an output of the VCO and the phase detector, a phase-to-current circuit coupled to an output of the phase detector, and a temperature circuit configured to output a temperature-dependent voltage. The system also includes a switching circuit configured to selectively couple the phase-to-current circuit to an input of the VCO and configured to selectively couple the temperature circuit to the input of the VCO.