公开(公告)号：US20240313732A1

公开(公告)日：2024-09-19

申请号：US18601676

申请日：2024-03-11

Applicant: Nordic Semiconductor ASA

Inventor： Marko PESSA ,  David ZAPATA

IPC: H03G3/30 ,  H03F3/21

CPC classification number: H03G3/3036 ,  H03F3/211 ,  H03F2200/451 ,  H03G2201/103 ,  H03G2201/307

Abstract: An amplifier circuit portion is proved. The amplifier circuit is arranged to amplify an input signal with a gain based on a gain control signal. The amplifier circuit portion comprises a plurality of amplifier cells having a common input for receiving the input signal and a common output for providing an amplified version of the input signal. At least one of the amplifier cells is operable in: a controllable gain mode in which the amplifier cell provides an amplification gain to the input signal based on the gain control signal; and a fixed gain mode in which the amplifier cell provides a fixed, non-zero amplification gain to the input signal.

公开(公告)号：US20230223971A1

公开(公告)日：2023-07-13

申请号：US17925287

申请日：2021-05-13

Applicant: Nordic Semiconductor ASA

Inventor： Marko PESSA ,  Sami KARVONEN

IPC: H04B1/04 ,  H03D7/12

CPC classification number: H04B1/04 ,  H03D7/125

Abstract: A radio-frequency modulator apparatus comprises a baseband stage, a mixer stage and a radio-frequency stage. The baseband stage comprises: an input line for receiving an input current representative of a baseband input signal, a baseband transistor that passes some or all of the input current between a first and a second terminal thereof, an electrical connection between the input line and a control terminal of the baseband transistor, and an output line connected to said control terminal. The mixer stage receives a signal from the baseband stage and mixes it with a radio-frequency local-oscillator signal to generate a radio-frequency mixed signal. The radio-frequency stage receives the radio-frequency mixed signal, applies the radio-frequency mixed signal to a control terminal of a radio-frequency transistor causing it to pass a radio-frequency output current between a first and a second terminal thereof, and outputs the radio-frequency output current as an output signal.

公开(公告)号：US20240313728A1

公开(公告)日：2024-09-19

申请号：US18601651

申请日：2024-03-11

Applicant: Nordic Semiconductor ASA

Inventor： Marko PESSA ,  Tuomas LEINONEN

IPC: H03G3/00 ,  H03F3/24 ,  H03G1/04

CPC classification number: H03G3/001 ,  H03F3/245 ,  H03F2200/465 ,  H03G1/04

Abstract: An amplifier apparatus is arranged to amplify an input signal with a gain based on a digital gain control signal. The amplifier apparatus comprises a digital-to-analogue converter arranged to convert the digital gain control signal into an analogue gain control signal according to a first non-linear relationship between digital gain control signal and analogue gain control signal; and an amplifier circuit portion arranged to amplify the input signal with a gain based on the analogue gain control signal according to a second non-linear relationship between analogue gain control signal and gain. The first non-linear relationship is based on the second non-linear relationship.