A Fully Integrated Direct-Conversion Receiver for CDMA and GPS Applications

This paper describes a fully integrated zero-IF receiver for cellular CDMA and GPS applications. The single-chip zero-IF receiver integrates the entire signal path for CDMA and GPS bands, including a low-noise amplifier (LNA), I/Q down-converters, baseband channel selection filters (CSFs), a voltage...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2006-11, Vol.41 (11), p.2408-2416
Main Authors: Kyoohyun Lim, Sang-Hoon Lee, Sunki Min, Ock, S., Myung-Woon Hwang, Chang-Hee Lee, Kyung-Lok Kim, Sangwoo Han
Format: Article
Language:English
Subjects:
Amplifiers
Applied sciences
Baseband
CDMA
CDMA2000
Cellular
channel-select filters
Circuit properties
Circuits
Code division multiple access
DC offset
direct-conversion receiver
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Filters
Gain
Geographic information systems
Global Positioning System
GPS
Local oscillators
low-noise amplifier (LNA)
Low-noise amplifiers
mixer
Multiaccess communication
Noise
Noise levels
Noise measurement
Oscillators, resonators, synthetizers
receiver
Receivers
Satellite navigation systems
Signal convertors
voltage-controlled oscillator (VCO)
Voltage-controlled oscillators
zero IF
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Summary:This paper describes a fully integrated zero-IF receiver for cellular CDMA and GPS applications. The single-chip zero-IF receiver integrates the entire signal path for CDMA and GPS bands, including a low-noise amplifier (LNA), I/Q down-converters, baseband channel selection filters (CSFs), a voltage-controlled oscillator (VCO), and a local oscillator (LO) distribution circuit for each band. The cellular-band LNA achieves a noise figure (NF) of 1.2 dB, input third-order intercept point (IIP3) of 11 dBm, and gain of 15.5 dB. Cellular I/Q down-converter and baseband circuitries show 9-dB composite NF, 9 dBm IIP3 and 60-dBm input second-order intercept point (IIP2) without IIP2 calibration. The measured LO leakage is less than -110 dBm at LNA input. The phase noise of the cellular VCO is -134 dBc/Hz at 900-kHz offset with 1.76-GHz carrier frequency. Total GPS signal path achieves NF of 1.7 dB and gain of 74 dB with 42-mA current. The receiver is fabricated in a 0.35-mum SiGe BiCMOS process and packaged in a 6 mm times 6 mm 40-pin micro-lead-frame. Handset measurements report that the receiver meets or exceeds all of the CDMA-2000 requirements
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2006.882892