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A single-chip 900-MHz spread-spectrum wireless transceiver in 1-μm CMOS. I. Architecture and transmitter design

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11 Author(s)
Rofougaran, A. ; Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA ; Chang, G. ; Rael, J.J. ; Chang, J.Y.-C.
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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

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:33 ,  Issue: 4 )

Date of Publication:

Apr 1998

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