IP2校准器使用共模反馈电路

Proceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005. Pub Date : 2005-12-05 DOI:10.1109/ESSCIR.2005.1541602

Woonyun Kim, Sung-Gi Yang, Yeon-kug Moon, J. Yu, Heeseon Shin, Wooseung Choo, Byeong-ha Park

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引用次数: 5

摘要

在无线CDMA/PCS/GPS/FM直接转换接收机中，利用共模反馈电路开发了一种IP2校准技术。IP2校准器能够提供不同的CMFB增益，以调整其共模输出阻抗，用于每个正负混频器输出。该方法的IIP2性能提高了20 db。该CDMA混频器的未校准IIP2为44 dBm, IIP3为4 dBm，噪声系数为6.5 dB，电压增益为42.2 dB。接收机RFIC采用0.5 /spl mu/m SiGe BiCMOS工艺，工作电压为2.7 ~ 3.1 V。无论是单独测试还是在手机上测试，它都超过了CDMA的所有要求。

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IP2 calibrator using common mode feedback circuitry

An IP2 calibration technique is developed using the common mode feedback circuitry in a direct-conversion receiver for wireless CDMA/PCS/GPS/FM applications. The IP2 calibrator is capable of providing a different CMFB gain to tune its common mode output impedance for each of the positive and negative mixer outputs. The method performs a 20-dB improvement in IIP2. The CDMA mixer achieves an uncalibrated IIP2 of 44 dBm, an IIP3 of 4 dBm, a noise figure of 6.5 dB and a voltage gain of 42.2 dB. The receiver RFIC is implemented in a 0.5 /spl mu/m SiGe BiCMOS process, and it operates from a 2.7 to 3.1 V single power supply. It exceeds all CDMA requirements when tested individually or on a handset.

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来源期刊

Proceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005.

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