公开(公告)号：US11683062B2

公开(公告)日：2023-06-20

申请号：US17404948

申请日：2021-08-17

Applicant: QUALCOMM Incorporated

Inventor： Janakiram Sankaranarayanan ,  Jun Tan ,  Lai Kan Leung ,  Timothy Donald Gathman ,  Mehmet Ipek ,  Ojas Choksi

IPC: H04B1/18 ,  H03F3/19

CPC classification number: H04B1/18 ,  H03F3/19 ,  H03F2200/294 ,  H03F2200/451

Abstract: A reconfigurable amplifier includes a first transistor having a gate coupled to an input of the reconfigurable amplifier, and a source coupled to a ground. The reconfigurable amplifier also includes a gate control circuit, and a second transistor having a gate coupled to the gate control circuit, a source coupled to a drain of the first transistor, and a drain coupled to an output of the reconfigurable amplifier, wherein the gate control circuit is configured to output a bias voltage to the gate of the second transistor in a cascode mode, and output a switch voltage to the gate of the second transistor in a non-cascode mode. The reconfigurable amplifier further includes a load coupled to the output of the reconfigurable amplifier.

公开(公告)号：US10432141B2

公开(公告)日：2019-10-01

申请号：US15187710

申请日：2016-06-20

Applicant: QUALCOMM Incorporated

Inventor： Jun Tan

IPC: H03B5/12 ,  H03F3/19 ,  H03F3/24 ,  H03G3/30 ,  H03B5/00 ,  H03L7/099

Abstract: Features and advantages of the present disclosure include a multimode voltage controlled oscillator (VCO). In one embodiment, a circuit comprises a VCO, first and second transistors, and first and second capacitive attenuators. The first and second transistors are cross coupled through the attenuators. In a first mode, the first and second transistors are turned off, and the capacitive attenuators attenuate a signal on output terminals of the VCO at control inputs of the first and second transistors. In another mode, the first and second transistors are turned on, and the capacitive attenuation is reduced or turned off so that control inputs of the first and second transistors receive signals on the outputs of the VCO.

公开(公告)号：US12009850B2

公开(公告)日：2024-06-11

申请号：US18317011

申请日：2023-05-12

Applicant: QUALCOMM Incorporated

Inventor： Janakiram Sankaranarayanan ,  Jun Tan ,  Lai Kan Leung ,  Timothy Donald Gathman ,  Mehmet Ipek ,  Ojas Choksi

IPC: H04B1/18 ,  H03F3/19

CPC classification number: H04B1/18 ,  H03F3/19 ,  H03F2200/294 ,  H03F2200/451

Abstract: An amplifying circuit includes a first reconfigurable amplifier configured to selectively operate in a cascode mode or a non-cascode mode, wherein an input of the first reconfigurable amplifier is coupled to a first input of the amplifying circuit, and an output of the first reconfigurable amplifier is coupled to an output of the amplifying circuit. The amplifying circuit also includes a second reconfigurable amplifier configured to selectively operate in the cascode mode or the non-cascode mode, wherein an input of the second reconfigurable amplifier is coupled to a second input of the amplifying circuit, and an output of the second reconfigurable amplifier is coupled to the output of the amplifying circuit.

公开(公告)号：US20170179883A1

公开(公告)日：2017-06-22

申请号：US15187710

申请日：2016-06-20

Applicant: QUALCOMM Incorporated

Inventor： Jun Tan

IPC: H03B5/12 ,  H03F3/24 ,  H03G3/30 ,  H03F3/19

CPC classification number: H03B5/1243 ,  H03B5/00 ,  H03B5/12 ,  H03B5/1212 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1265 ,  H03B5/1296 ,  H03B2200/009 ,  H03F3/19 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/165 ,  H03F2200/171 ,  H03F2200/294 ,  H03F2200/333 ,  H03F2200/451 ,  H03G3/3042 ,  H03L7/099

Abstract: Features and advantages of the present disclosure include a multimode voltage controlled oscillator (VCO). In one embodiment, a circuit comprises a VCO, first and second transistors, and first and second capacitive attenuators. The first and second transistors are cross coupled through the attenuators. In a first mode, the first and second transistors are turned off, and the capacitive attenuators attenuate a signal on output terminals of the VCO at control inputs of the first and second transistors. In another mode, the first and second transistors are turned on, and the capacitive attenuation is reduced or turned off so that control inputs of the first and second transistors receive signals on the outputs of the VCO.