公开(公告)号：US11953535B2

公开(公告)日：2024-04-09

申请号：US17260825

申请日：2019-07-17

Applicant: TEKNOLOGIAN TUTKIMUSKESKUS VTT OY

Inventor： Mikko Varonen ,  Henrik Forsten ,  Jan Saijets

IPC: G01R29/08 ,  G01R35/00 ,  H03B29/00 ,  H03F1/22 ,  H03F3/19 ,  H03F3/72

CPC classification number: G01R29/0878 ,  G01R35/005 ,  H03B29/00 ,  H03F1/22 ,  H03F3/19 ,  H03F3/72 ,  H03F2200/207 ,  H03F2200/451

Abstract: An active noise source apparatus includes a pair of a first and second switched-biased noise amplifier branches (22, 23). A directional coupler (24) having a pair of input ports (3, 4) connected to combine the noise outputs from the first and second switched-biased noise amplifiers. One output port (4) of the directional coupler (24) is connected to a matched termination (Rtermination) and another output port (2) of the directional coupler (24) is connected to an output (25) of the active noise source.

公开(公告)号：US11476814B2

公开(公告)日：2022-10-18

申请号：US16961664

申请日：2018-12-11

Applicant: Teknologian tutkimuskeskus VTT Oy

Inventor： Mikko Varonen ,  Jan Saijets ,  Jan Holmberg

IPC: H03F3/21 ,  H03F3/19 ,  H03F3/45

Abstract: An improved transformer based switch for PALNA applications. The transformer based switch having an input single pole port and a circuit with at least one transformer and at least one switch configured to connect portions of the transformer to ground or to short the transformer. The primary side of the transformer being connected to the input port and the secondary side of the transformer being connected to an output port.