A LO Buffer with Tunable I/Q Phase for WLAN

Luo Ke-xin; Luo Rong; Zheng Ji-hua; Yang Hua-zhong

doi:10.3724/SP.J.1146.2006.00181

Volume 29 Issue 5

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Article Navigation > Journal of Electronics & Information Technology > 2007 > 29(5): 1247-1249

Luo Ke-xin, Luo Rong, Zheng Ji-hua, Yang Hua-zhong. A LO Buffer with Tunable I/Q Phase for WLAN[J]. Journal of Electronics & Information Technology, 2007, 29(5): 1247-1249. doi: 10.3724/SP.J.1146.2006.00181

Citation:

Luo Ke-xin, Luo Rong, Zheng Ji-hua, Yang Hua-zhong. A LO Buffer with Tunable I/Q Phase for WLAN[J]. Journal of Electronics & Information Technology, 2007, 29(5): 1247-1249. doi: 10.3724/SP.J.1146.2006.00181

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A LO Buffer with Tunable I/Q Phase for WLAN

doi: 10.3724/SP.J.1146.2006.00181

Received Date: 2006-02-23
Rev Recd Date: 2006-06-23
Publish Date: 2007-05-19

Abstract

Abstract

This paper presents a Local Osicillator (LO) buffer for WLAN which can tune the I/Q phase of the LO signal in order to calibrate IQ imbalance in direct conversion transceiver. It can tune the phase by means of switching the MOS capacitor array to delay the LO signal. It is implemented in SMIC 0.18m, the layout of 4.8~6GHz I/Q LO buffer occupies a total die area of 650550m2. Post simulation shows that the phase shift of the I or Q LO buffer varies almost linearly from 0 to 8 with the action of 5bit control word, whereas the output power of the LO buffer varies within 0.2 dB.

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References(1)

References

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