Title :
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
fDate :
1/1/2003 12:00:00 AM
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;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2002.806259
