Feedforward technique for offset cancellation in broadband differential amplifiers

Author

Pham, Duy-Dong ; Brinkhoff, James ; Kang, Kai ; Ang, Chyuen-Wei ; Lin, Fujiang ; Heng, Chun-Huat

Author_Institution

Integrated Circuits & Syst. Lab., A*STAR, Singapore, Singapore

fYear

2009

fDate

14-16 Dec. 2009

Firstpage

429

Lastpage

432

Abstract

This paper presents a new feedforward offset cancellation technique for broadband amplifiers which are used in high speed communication systems. Unlike other conventional techniques, such as feedback cancellation or AC coupling, the proposed technique eliminates the need for larger area passive components and avoids the potential stability issue by eliminating the feedback path. Implementing in 90 nm CMOS, the broadband amplifier achieves 52.3 dB gain and 2.7 GHz 3-dB bandwidth with more than 50 dB DC offset rejection.

Keywords

CMOS integrated circuits; MMIC amplifiers; differential amplifiers; feedforward; wideband amplifiers; AC coupling; CMOS process; DC offset rejection; broadband differential amplifiers; feedforward technique; frequency 2.7 GHz; gain 52.3 dB; high speed communication systems; offset cancellation technique; size 90 nm; Broadband amplifiers; Capacitance; Coupling circuits; Detectors; Differential amplifiers; High speed integrated circuits; Low pass filters; Output feedback; Pulse amplifiers; Stability; Broadband; differential amplifier; feedforward; offset cancellation;

fLanguage

English

Publisher

ieee

Conference_Titel

Integrated Circuits, ISIC '09. Proceedings of the 2009 12th International Symposium on

Conference_Location

Singapore

Print_ISBN

978-9-8108-2468-6

Type

conf

Filename

5403949