几篇razavi 的文章

34ssc05-razaviIEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 34, NO. 5, MAY 1999

573

A 900-MHz/1.8-GHz CMOS Transmitter for Dual-Band Applications
Behzad Razavi, Member, IEEE
Abstract― The design of a radio-frequency transmitter that can operate in two bands while employing a minimal number of external components entails many challenges at both the architecture and the circuit levels. This paper describes the design of a 900-MHz/1.8-GHz transmitter implemented in CMOS technology for dual-band applications. Congured as a two-step architecture, the circuit generates the rst upconverted signal in quadrature form and subsequently performs single-sideband modulation to produce the output in two bands. Fabricated in a 0.6-m digital CMOS technology, the transmitter exhibits unwanted spurs 40 dB below the carrier