AMPLIFIER WITH CONTINUOUS GAIN CONTROL

WIPO Patent Application WO/2021/015618

A3

A variable gain amplifier with an amplifier (A), a current-steering circuit (CSC), a feedback network (FBN), and a gain control circuit (GCC). The current-steering circuit (CSC) divides an output current (Iout) of the amplifier (A) into a plurality of control currents (Ii), wherein the output current (Iout) is divided using associated current-steering fractions (αi), the current-steering fractions αi being determined using a control input from the gain control circuit (GCC). The feedback network (FBN) comprises a network of components and is arranged to provide the feedback current (Ifb) as a weighted sum of the control currents (Ii), in accordance with I fb = ΣN i =1 β i I ι , wherein βi are feedback factors, 0≤ βi ≤ 1, determined by the components in the feedback network (FBN). The gain control circuit (GCC) is arranged to control the associated current-steering fractions (αi) in a continuous time-varying manner, wherein at any time ΣN α=1 α i = 1.

PERTIJS MICHIEL ANTONIUS PETRUS (NL)
KANG EUCHUL (NL)

PCT/NL2020/050481

April 15, 2021

July 22, 2020

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UNIV DELFT TECH (NL)

H03G1/00; H03F3/19; H03G3/30

US5786730A	1998-07-28
US20180367111A1	2018-12-20
EP1427103A2	2004-06-09
JPH03232310A	1991-10-16
US20180278333A1	2018-09-27

XIE H Y ET AL: "A SiGe HBT low noise variable gain amplifier with controllable feedback of a p-i-n diode", MICROWAVE CONFERENCE PROCEEDINGS (CJMW), 2011 CHINA-JAPAN JOINT, IEEE, 20 April 2011 (2011-04-20), pages 1 - 4, XP031876089, ISBN: 978-1-4577-0625-7

NEDERLANDSCH OCTROOIBUREAU (NL)

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