Title :
A single-chip 900-MHz spread-spectrum wireless transceiver in 1-μm CMOS. I. Architecture and transmitter design
Author :
Rofougaran, Ahmadreza ; Chang, Glenn ; Rael, Jacob J. ; Chang, James Y C ; Rofougaran, Maryam ; Chang, Paul J. ; Djafari, Masoud ; Ku, M.-K. ; Roth, Edward W. ; Abidi, Asad A. ; Samueli, Henry
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
4/1/1998 12:00:00 AM
Abstract :
A single-chip transceiver for frequency-hopped code division multiple access (CDMA) in the 900 MHz industrial, scientific and medical (ISM) band is implemented in 1-μm CMOS. It combines a digital frequency synthesizer, a double quadrature upconverter, an integrated oscillator, and a power amplifier with variable output. Data modulates a carrier hopping at 20 kHz with quaternary frequency-shift keying (4-FSK). At an output power level of +3 dBm, the harmonics and spurious tones lie at -52 dBc or below. When active, the transmitter drains 100 mA from 3 V
Keywords :
CMOS integrated circuits; UHF frequency convertors; UHF integrated circuits; UHF power amplifiers; code division multiple access; frequency hop communication; frequency shift keying; frequency synthesizers; harmonics; mobile radio; spread spectrum communication; transceivers; 1 micron; 100 mA; 3 V; 900 MHz; CMOS; ISM band; carrier hopping; digital frequency synthesizer; double quadrature upconverter; frequency-hopped code division multiple access; harmonics; integrated oscillator; output power level; power amplifier; quaternary frequency-shift keying; single-chip transceiver; spread-spectrum wireless transceiver; spurious tones; Frequency conversion; Frequency shift keying; Frequency synthesizers; Multiaccess communication; Oscillators; Power amplifiers; Power generation; Power system harmonics; Spread spectrum communication; Transceivers;
Journal_Title :
Solid-State Circuits, IEEE Journal of
