公开(公告)号：US10200009B2

公开(公告)日：2019-02-05

申请号：US15253647

申请日：2016-08-31

Applicant: Analog Devices Global

Inventor： Mohamed A. Abdalla ,  Mohamed Mobarak ,  Ahmed Ibrahim Khalil

IPC: H03H7/42 ,  H03H11/32 ,  H01F27/40 ,  H01F21/12 ,  H01F27/28 ,  H01L23/522 ,  H03H7/01 ,  H03H7/09 ,  H01P5/10 ,  H01F17/00

Abstract: A transformer-based balun circuit is disclosed herein. The balun can be implemented using a spiral transformer, where primary and secondary transformer windings can be inductively coupled and can be implemented on the same metal layer (or different metal layers, e.g. vertically adjacent metal layers). The balun can further include a compensation capacitor and a digital frequency tuning circuit. The compensation capacitor can be introduced at one of the differential terminals to reduce or suppress the amplitude and phase imbalance. The digital frequency tuning circuit can be a switchable bank of capacitors, which allows for tuning the frequency of operation of the transformer-based balun.

公开(公告)号：US20180062607A1

公开(公告)日：2018-03-01

申请号：US15253647

申请日：2016-08-31

Applicant: Analog Devices Global

Inventor： Mohamed A. Abdalla ,  Mohamed Mobarak ,  Ahmed Ibrahim Khalil

IPC: H03H7/42 ,  H01F27/40 ,  H03H11/32

CPC classification number: H03H7/42 ,  H01F21/12 ,  H01F27/2804 ,  H01F27/40 ,  H01F2017/0026 ,  H01F2021/125 ,  H01L23/5223 ,  H03H7/0153 ,  H03H7/09 ,  H03H7/422 ,  H03H11/32 ,  H03H2210/025

Abstract: A transformer-based balun circuit s disclosed herein. The balun can be implemented using a spiral transformer, where primary and secondary transformer windings can be inductively coupled and can be implemented on the same metal layer (or different metal layers, e.g. vertically adjacent metal layers). The balun can further include a compensation capacitor and a digital frequency tuning circuit. The compensation capacitor can be introduced at one of the differential terminals to reduce or suppress the amplitude and phase imbalance. The digital frequency tuning circuit can be a switchable bank of capacitors, which allows for tuning the frequency of operation of the transformer-based balun.