A saw-less direct conversion long term evolution receiver with 25% duty-cycle LO in 130 nm CMOS technology

A CMOS long-term evolution （LTE） direct convert receiver that eliminates the interstage SAW filter is presented. The receiver consists of a low noise variable gain transconductance amplifier （TCA） a quadrature passive current commutating mixer with a 25% duty-cycle LO, a trans-impedance amplifier （T...

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Bibliographic Details
Published in:半导体学报 2013 (3), p.70-75
Main Author: He Siyuan Zhang Changhong Tao Liang Zhang Weifeng Zeng Longyue Lu Wei Wu Haijun
Format: Article
Language:Chinese
Subjects:
25
Chebyshev
CMOS
duty-cycle
figure
filter
LTE
mixer
noise
passive
RF
saw-less
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Summary:A CMOS long-term evolution （LTE） direct convert receiver that eliminates the interstage SAW filter is presented. The receiver consists of a low noise variable gain transconductance amplifier （TCA） a quadrature passive current commutating mixer with a 25% duty-cycle LO, a trans-impedance amplifier （TIA）, a 7th-order Chebyshev filter and programmable gain amplifiers （PGAs）. A wide dynamic gain range is allocated in the RF and analog parts. A current commutating passive mixer with a 25% duty-cycle LO improves gain, noise, and linearity. An LPF based on a Tow-Thomas biquad suppresses out-of-band interference. Fabricated in a 0.13 μm CMOS process, the receiver chain achieves a 107 dB maximum voltage gain, 2.7 dB DSB NF （from PAD port）, 11 dBm IIP3, and 〉 ＋65 dBm IIP2 after calibration, 96 dB dynamic control range with 1 dB steps, less than 2% error vector magnitude （EVM） from 2.3 to 2.7 GHz. The total receiver （total I Q path） draws 89 mA from a 1.2-V LDO on chip supply.
ISSN:1674-4926