An image-rejection down-converter for low-IF receivers

An image-rejection down-converter for low-IF receivers

Implemented in 4.1 mm 2 in 130-nm CMOS, a dual-conversion image-rejection down-converter applied to the wireless code-division multiple-access (WCDMA) standard draws 13 mA from a single 1.8-V power supply. Using an IF of 2.5 MHz, the WCDMA image-rejection band is widened from 0.58-4.42 MHz to 0.48-5...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2005-02, Vol.53 (2), p.478-487
Hauptverfasser: Sher Jiun Fang, Bellaouar, A., See Taur Lee, Allstot, D.J.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Bandwidth
Circuit properties
CMOS
Code standards
Down-converters
Electric potential
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Gain
Gain measurement
Image-rejection down-converter
low-IF receiver
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwaves
mixer
Multiaccess communication
Noise figure
Noise levels
Noise measurement
polyphase filter
Power supplies
Production
quadrature local-oscillator (LO) generator
quadrature mixer
Temperature
Voltage
wireless code-division multiple-access (WCDMA)
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Beschreibung
Zusammenfassung:Implemented in 4.1 mm 2 in 130-nm CMOS, a dual-conversion image-rejection down-converter applied to the wireless code-division multiple-access (WCDMA) standard draws 13 mA from a single 1.8-V power supply. Using an IF of 2.5 MHz, the WCDMA image-rejection band is widened from 0.58-4.42 MHz to 0.48-5.2 MHz-a bandwidth ratio of 10.8-to accommodate process, voltage, and temperature variations in high-volume production. Ten samples are measured and fully characterized: average image-rejection ratio (IRR) is 46.6 dBc, gain is 12 dB, and noise figure is 10.8 dB. Typical IRR is 44.8, 46.5, and 47.5 dBc at -20degC, 25degC, and 80degC, respectively
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2004.840759