DC-coupled IF stage design for a 900-MHz ISM receiver

Author

Harjani, Ramesh ; Kim, Jonghae ; Harvey, Jackson

Author_Institution

Dept. of Electr. & Comput. Eng., Minnesota Univ., USA

Volume

38

Issue

1

fYear

2003

fDate

1/1/2003 12:00:00 AM

Firstpage

126

Lastpage

134

Abstract

This paper presents a DC-coupled 900-MHz ISM band RF front-end for a short-range wireless receiver. The front-end, fabricated in a 0.5-μm CMOS process, is intended as a test vehicle to verify the proposed DC-coupled topology. In this topology, a low-frequency feedback circuit suppresses the DC offset and low-frequency noise at the mixer output. The DC-coupled topology is compared with traditional AC coupling. We show that there is a tradeoff between bandwidth and midband loss in a fully integrated AC-coupled system. The proposed DC-coupling technique does not impose this tradeoff. The DC-coupled topology was verified via simulation and measurements from the test vehicle.

Keywords

CMOS analogue integrated circuits; UHF integrated circuits; circuit feedback; integrated circuit design; radio receivers; 0.5 micron; 900 MHz; CMOS process; DC offset suppression; DC-coupled IF stage design; DC-coupled topology; ISM band RF front-end; ISM receiver; LF feedback circuit; LF noise suppression; bandwidth; direct-coupled signal transfer technique; low-frequency noise; midband loss; short-range wireless receiver; Baseband; CMOS process; Capacitors; Circuit topology; Coupling circuits; Low-frequency noise; Parasitic capacitance; Radio frequency; Vehicles; Wireless sensor networks;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2002.806259

Filename

1158790