Reconfigurable low pass filter with Automatic Frequency Tuning for WCDMA and GSM application

A reconfigurable baseband low-pass filter (LPF) with automatic cut-off frequency tuning for WCDMA and GSM application is presented. Cut-off frequencies of 2.1MHz and 200-KHz, and out of band IIP3 at least 20.8dBm and 22.7dBm are achieved under WCDMA and GSM mode respectively. The in band ripple is b...

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Hauptverfasser:	Chen Jiang, Renzhong Xie, Weinan Li, Yumei Huang, Zhiliang Hong
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Baseband Chebyshev approximation GSM Multiaccess communication Spread spectrum communication Tuners
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creator	Chen Jiang Renzhong Xie Weinan Li Yumei Huang Zhiliang Hong
description	A reconfigurable baseband low-pass filter (LPF) with automatic cut-off frequency tuning for WCDMA and GSM application is presented. Cut-off frequencies of 2.1MHz and 200-KHz, and out of band IIP3 at least 20.8dBm and 22.7dBm are achieved under WCDMA and GSM mode respectively. The in band ripple is below 0.5dB in both modes. By utilizing digital frequency tuning technique, a cut-off frequency error of less than 2.5% is obtained. The total tuning time is about 5.5μs. The LPF is fabricated in SMIC 0.13μm CMOS technology with chip area of 0.35mm 2 , and the current consumptions are 8.3mA and 1.1mA for WCDMA mode and GSM mode respectively under a power supply of 1.5V.
doi_str_mv	10.1109/ASICON.2011.6157392
format	Conference Proceeding
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Cut-off frequencies of 2.1MHz and 200-KHz, and out of band IIP3 at least 20.8dBm and 22.7dBm are achieved under WCDMA and GSM mode respectively. The in band ripple is below 0.5dB in both modes. By utilizing digital frequency tuning technique, a cut-off frequency error of less than 2.5% is obtained. The total tuning time is about 5.5μs. 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Cut-off frequencies of 2.1MHz and 200-KHz, and out of band IIP3 at least 20.8dBm and 22.7dBm are achieved under WCDMA and GSM mode respectively. The in band ripple is below 0.5dB in both modes. By utilizing digital frequency tuning technique, a cut-off frequency error of less than 2.5% is obtained. The total tuning time is about 5.5μs. The LPF is fabricated in SMIC 0.13μm CMOS technology with chip area of 0.35mm 2 , and the current consumptions are 8.3mA and 1.1mA for WCDMA mode and GSM mode respectively under a power supply of 1.5V.</abstract><pub>IEEE</pub><doi>10.1109/ASICON.2011.6157392</doi><tpages>4</tpages></addata></record>
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subjects	Baseband Chebyshev approximation GSM Multiaccess communication Spread spectrum communication Tuners
title	Reconfigurable low pass filter with Automatic Frequency Tuning for WCDMA and GSM application
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