A single-chip CMOS direct-conversion transceiver for 900 MHz spread-spectrum digital cordless phones

This fully-integrated transceiver incorporates RF circuits, synthesizer, baseband filters, demodulator, and digital signal processing. The few off-chip components include an ISM band filter, a balun, an RF matching network, an RC loop filter for the PLL, a crystal resonator, and a resistor for biasi...

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Bibliographic Details
Published in1999 IEEE International Solid-State Circuits Conference. Digest of Technical Papers. ISSCC. First Edition (Cat. No.99CH36278) pp. 228 - 229
Main Authors Cho, T., Dukatz, E., Mack, M., Macnally, D., Marringa, M., Mehta, S., Nilson, C., Plouvier, L., Rabii, S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1999
Subjects
Baseband
Circuits
Demodulation
Digital filters
Matched filters
Radio frequency
Resonator filters
Switches
Synthesizers
Transceivers
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Summary:This fully-integrated transceiver incorporates RF circuits, synthesizer, baseband filters, demodulator, and digital signal processing. The few off-chip components include an ISM band filter, a balun, an RF matching network, an RC loop filter for the PLL, a crystal resonator, and a resistor for biasing. A transmit/ receive (T/R) switch is avoided by sharing a single RF port between transmitter and receiver. An offset cancellation method attenuates offsets in the baseband without sacrificing bandwidth in the direct conversion receiver. Careful circuit design, timing, and layout considerations provide isolation between the sensitive RF signals and the digital switching noise. The IC is in 0.6/spl mu/m CMOS and provides a complete interface between antenna and voiceband codec.
ISBN:9780780351264
0780351266
ISSN:0193-6530
2376-8606
DOI:10.1109/ISSCC.1999.759205