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O. Charlon,
M. Locher,
H.A. Visser,
D. Duperray, J. Chen,
M. Judson,
A.L. Landesman,
C. Hritz,
U. Kohlschuetter,
Yifeng Zhang, [......],
Minzhan Gao,
S. Haas,
V. Maheshwari,
A. Bury,
G. Nitsche,
A. Wrzyszcz,
W. Redman-White,
H. Bonakdar,
Rachid El Waffaoui,
M. Bracey
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ABSTRACT: This paper describes a high-performance WLAN 802.11a/b/g radio transceiver, optimized for low-power in mobile applications, and for co-existence with cellular and Bluetooth systems in the same terminal. The direct-conversion transceiver architecture is optimized in each mode for low-power operation without compromising the challenging RF performance targets. A key transceiver requirement is a sensitivity of -77 dBm (at the LNA input) in 54 Mb/s OFDM mode while in the presence of a GSM1900 transmitter interferer. The receiver chain achieves an overall noise figure of 2.8/3.2 dB, consuming 168/185 mW at 2.8 V for the 2.4/5GHz bands, respectively. Signal loopback and transmit power detection techniques are used in conjunction with the baseband modem processor to calibrate the transmitter LO leakage and the transceiver I/Q imbalances. Fabricated in a 70 GHz f<sub>T</sub> 0.25-mum SiGe BiCMOS technology for system-in-package (SiP) use, the dual-band, tri-mode transceiver occupies only 4.6 mm<sup>2</sup>
IEEE Journal of Solid-State Circuits 08/2006; · 3.23 Impact Factor
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H. Waite,
P. Ta, J. Chen,
H. Li,
M. Gao,
C.S. Chang,
Y.S. Chang,
W. Redman-White,
O. Charlon,
Y. Fan,
R. Perkins,
D. Brunel,
E. Soudee,
N. Lecacheur,
S. Clamagirand
[show abstract]
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ABSTRACT: This paper describes a highly integrated CDMA 2000 US-CEL band (880-MHz) receiver. The single-chip zero-IF design incorporates all receiver signal-path functions including the low-noise amplifier (LNA) on a single die. The complete receiver design exceeds the stringent linearity and local oscillator (LO) leakage requirements for this standard arising from the coexistence with narrow-band FM signals. The integrated LNA achieves 1.0-dB noise figure with +9-dBm IIP3 at high gain, and by maintaining LO leakage to the antenna port well below -80 dBm at all gain settings, no external LNA is required. The receiver is fabricated in a 0.25-μm 40-GHz f<sub>t</sub> BICMOS technology, and occupies 3 mm<sup>2</sup>.
IEEE Journal of Solid-State Circuits 08/2004; · 3.23 Impact Factor
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H. Waite,
P. Ta, J Chen,
H Li,
M Gao,
C.S. Chang,
Y.S. Chang,
W. Redman-White,
O. Charlon,
Y Fan,
R. Perkins,
D. Brunel,
E. Soudee
[show abstract]
[hide abstract]
ABSTRACT: This paper describes a highly integrated CDMA 2000 US-CEL band receiver signal path functions including the LNA on a single die. The complete receiver design exceeds the stringent linearity and LO leakage requirements for this standard arising from the co-existence with narrow band FM signals. The integrated LNA achieves 1.0dB noise figure with +9dBm IIP3 at high gain, and by maintaining LO leakage to the antenna port well below -80dBm at all gain settings, no external LNA is required. The receiver is fabricated in a 0.25μm 40 GHz ft BICMOS technology, and occupies 3mm<sup>2</sup>.
Solid-State Circuits Conference, 2003. ESSCIRC '03. Proceedings of the 29th European; 10/2003
