[1] Zhang Hao, Li Zhiqun, Wang Zhigong,. A CMOS high-IF down-conversion mixerfor WLAN 802.11a applications [J]. Journal of Southeast University (English Edition), 2010, 26 (1): 11-16. [doi:10.3969/j.issn.1003-7985.2010.01003]

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A CMOS high-IF down-conversion mixerfor WLAN 802.11a applications()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

26

Issue:

2010 1

Page:

11-16

Research Field:

Circuit and System

Publishing date:

2010-03-30

Info

Title:

A CMOS high-IF down-conversion mixerfor WLAN 802.11a applications

Author(s):

Zhang Hao;  Li Zhiqun;  Wang Zhigong

Institute of RF- & OE-ICs, Southeast University, Nanjing 210096, China

Keywords:

high intermediate frequency;  mixer;  high linearity;  WLAN 802.11a;  buffer;  complementary metal oxide semiconductor transistor(CMOS)

PACS:

TN402;TN432

DOI:

10.3969/j.issn.1003-7985.2010.01003

Abstract:

A low noise, high conversion gain down-conversion mixer for WLAN 802.11a applications, which adopts the high intermediate frequency(IF)topology, is presented. The input radio frequency(RF)band, local oscillator(LO)frequency band and output IF are 5.15 to 5.35, 4.15 to 4.35 and 1 GHz, respectively. Source resistive degeneration technique and pseudo-differential Gilbert topology are used to achieve high linearity, and, current bleeding technique and LC resonant loads are used to acquire a low noise figure. In addition, the mixer adopts a common-source transistor pair cross-stacked with a source follow pair(CSSF)circuit as an output buffer to enhance the mixer’s conversion gain but not deteriorate the other performances. The mixer is implemented in 0.18 μm RF CMOS(complementary metal oxide semiconductor transistor)technology and the chip area of the mixer including all bonding pads is 580 μm×1 185 μm. The measured results show that under a 1.8 V supply, the conversion gain is 10.1 dB; the input 1 dB compression point and the input-referred third-order intercept point are-3.5 and 5.3 dBm, respectively; the single side band(SSB)noise figure(NF)is 8.65 dB, and the core current consumption is 3.8 mA.

References:

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Memo

Memo:

Biographies: Zhang Hao(1982—), male, graduate; Li Zhiqun(corresponding author), male, doctor, professor, zhiqunli@seu.edu.cn.
Foundation item: The Science and Technology Program of Zhejiang Province(No.2008C16017).
Citation: Zhang Hao, Li Zhiqun, Wang Zhigong. A CMOS high-IF down-conversion mixer for WLAN 802.11a applications[J]. Journal of Southeast University(English Edition), 2010, 26(1): 11-16.

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