公开(公告)号：US20210143784A1

公开(公告)日：2021-05-13

申请号：US17095658

申请日：2020-11-11

Applicant: IMEC vzw

Inventor： Khaled Khalaf ,  Steven Brebels

IPC: H03G3/00 ,  H03G1/00 ,  H03F1/56 ,  H03F3/72

Abstract: A digitally controlled variable gain amplifier (VGA) for generating amplification output levels is disclosed. In one aspect, the digitally controlled VGA includes a positive amplification stage including at least two positive amplifiers, and a corresponding negative amplification stage coupled to the positive amplification stage. The negative amplification stage includes at least two negative amplifiers. The positive amplification stage and the corresponding negative amplification stage are digitally controlled by one or more digital codes. The corresponding negative amplification stage is coupled in parallel with the positive amplification stage and is equally weighted as the positive amplification stage, and both the positive amplification stage and the corresponding negative amplification stage selectively contribute to the generation of the amplification output levels for the digitally controlled VGA.

公开(公告)号：US20210194445A1

公开(公告)日：2021-06-24

申请号：US17128537

申请日：2020-12-21

Applicant: IMEC vzw

Inventor： Khaled Khalaf ,  Steven Brebels

IPC: H03F3/45 ,  H03G3/30

Abstract: A sign switching circuitry is disclosed. In one aspect, the sign switching circuitry includes a first and second differential common-source amplifier having common differential input nodes and common differential output nodes configured such that a differential input signal applied at the common differential input nodes is amplified to a differential output signal at the common differential output nodes with a fixed gain by the first amplifier and by the fixed gain with opposite sign by the second amplifier. The sign switching circuitry also includes a switching circuitry configured to activate the first common-source amplifier and deactivate the second common-source amplifier to amplify the differential input signal by the fixed gain, and to activate the second common-source amplifier and deactivate the first common-source amplifier to amplify the differential input signal by the fixed gain with opposite sign.

公开(公告)号：US11621685B2

公开(公告)日：2023-04-04

申请号：US17095658

申请日：2020-11-11

Applicant: IMEC vzw

Inventor： Khaled Khalaf ,  Steven Brebels

IPC: H03G3/00 ,  H03F1/56 ,  H03F3/72 ,  H03G1/00

Abstract: A digitally controlled variable gain amplifier (VGA) for generating amplification output levels is disclosed. In one aspect, the digitally controlled VGA includes a positive amplification stage including at least two positive amplifiers, and a corresponding negative amplification stage coupled to the positive amplification stage. The negative amplification stage includes at least two negative amplifiers. The positive amplification stage and the corresponding negative amplification stage are digitally controlled by one or more digital codes. The corresponding negative amplification stage is coupled in parallel with the positive amplification stage and is equally weighted as the positive amplification stage, and both the positive amplification stage and the corresponding negative amplification stage selectively contribute to the generation of the amplification output levels for the digitally controlled VGA.

公开(公告)号：US20140235187A1

公开(公告)日：2014-08-21

申请号：US14180393

申请日：2014-02-14

Applicant: Vrije Universiteit Brussel ,  IMEC VZW

Inventor： Vojkan Vidojkovic ,  Khaled Khalaf ,  Viki Szortyka ,  Kristof Vaesen ,  Piet Wambacq

IPC: H03F3/189 ,  H04B1/04

CPC classification number: H03F3/189 ,  H03F1/02 ,  H03F1/0261 ,  H03F3/24 ,  H03F3/245 ,  H03F3/45206 ,  H03F2200/18 ,  H03F2200/336 ,  H03F2200/405 ,  H03F2200/534 ,  H03F2200/537 ,  H03F2200/541 ,  H03F2203/45644 ,  H04B1/0475 ,  H04B2001/045

Abstract: Front-end systems for a transmitter included in a radio device are disclosed. An example front-end system may comprise a voltage-to-power mixer. The voltage-to-power mixer may be configured to up-convert a baseband signal to a high-frequency signal by multiplying the baseband signal with a local oscillator signal. Additionally, the voltage-to-power mixer may include a voltage feedback circuit. The example front-end system may further comprise a two-stage power amplifier. The two-stage power amplifier may be configured to amplify the high-frequency signal.

Abstract translation: 公开了一种用于包括在无线电设备中的发射机的前端系统。 示例性前端系统可以包括电压 - 功率混合器。 电压 - 功率混频器可以被配置为通过将基带信号与本地振荡器信号相乘来将基带信号上变频到高频信号。 另外，电压 - 功率混频器可以包括电压反馈电路。 示例性前端系统还可以包括两级功率放大器。 两级功率放大器可以被配置为放大高频信号。

公开(公告)号：US11791785B2

公开(公告)日：2023-10-17

申请号：US17128537

申请日：2020-12-21

Applicant: IMEC vzw

Inventor： Khaled Khalaf ,  Steven Brebels

IPC: H03F3/45 ,  H03G3/30

CPC classification number: H03F3/45183 ,  H03G3/3036 ,  H03F2200/451 ,  H03G2201/103 ,  H03G2201/307

Abstract: A sign switching circuitry is disclosed. In one aspect, the sign switching circuitry includes a first and second differential common-source amplifier having common differential input nodes and common differential output nodes configured such that a differential input signal applied at the common differential input nodes is amplified to a differential output signal at the common differential output nodes with a fixed gain by the first amplifier and by the fixed gain with opposite sign by the second amplifier. The sign switching circuitry also includes a switching circuitry configured to activate the first common-source amplifier and deactivate the second common-source amplifier to amplify the differential input signal by the fixed gain, and to activate the second common-source amplifier and deactivate the first common-source amplifier to amplify the differential input signal by the fixed gain with opposite sign.

公开(公告)号：US11128326B2

公开(公告)日：2021-09-21

申请号：US17098178

申请日：2020-11-13

Applicant: IMEC vzw ,  Vrije Universiteit Brussel

Inventor： Johan Nguyen ,  Khaled Khalaf ,  Pierre Wambacq ,  Jan Craninckx

IPC: H04B1/04 ,  H03F3/193 ,  H03F3/72 ,  H03G3/00 ,  H03G1/00

Abstract: A digital radio-frequency (RF) circuitry is disclosed. In one aspect, the circuitry includes a digitally controlled amplifier configured to receive an RF input signal and a digital control signal, and to output an amplitude controlled output signal. The digitally controlled amplifier includes one or more common-source amplifying unit cells. A respective common-source amplifying unit cell includes a sources node connected to a switching circuitry controllable by the digital control signal so as to activate or deactivate the common-source amplifying unit cell. The switching circuitry comprises a first switch configured to connect the source node with a first power supply node and a second switch configured to connect the source node with a second power supply node when activating and deactivating, respectively, the common-source amplifying unit cell.

公开(公告)号：US20210152197A1

公开(公告)日：2021-05-20

申请号：US17098178

申请日：2020-11-13

Applicant: IMEC vzw ,  Vrije Universiteit Brussel

Inventor： Johan Nguyen ,  Khaled Khalaf ,  Pierre Wambacq ,  Jan Craninckx

IPC: H04B1/04 ,  H03F3/193

Abstract: A digital radio-frequency (RF) circuitry is disclosed. In one aspect, the circuitry includes a digitally controlled amplifier configured to receive an RF input signal and a digital control signal, and to output an amplitude controlled output signal. The digitally controlled amplifier includes one or more common-source amplifying unit cells. A respective common-source amplifying unit cell includes a sources node connected to a switching circuitry controllable by the digital control signal so as to activate or deactivate the common-source amplifying unit cell. The switching circuitry comprises a first switch configured to connect the source node with a first power supply node and a second switch configured to connect the source node with a second power supply node when activating and deactivating, respectively, the common-source amplifying unit cell.