A 900-MHz bandwidth analog baseband circuit with 1-dB step and 30-dB gain dynamic range
A 900-MHz bandwidth analog baseband circuit with 1-dB step and 30-dB gain dynamic range
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DOI：
10.1109/esscirc.2010.5619744
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
M. Hosoya;T. Mitomo;O. Watanabe
中科院分区：
文献类型：
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作者：
M. Hosoya;T. Mitomo;O. Watanabe
A wide-bandwidth analog baseband circuit with digital gain control is implemented in a 65-nm CMOS process. The proposed circuit adopts a variable transconductance amplifier, which achieves constant bandwidth regardless of the gain settings. Bandwidth variation is less than ±1.2 % within the gain control range of 20 dB. The proposed analog baseband circuit has in-phase and quadrature-phase paths and draws 24.8 mA from a 1.2-V power supply. Measured results show that 1-dB step gain control with 0.25-dB differential nonlinearity (DNL) for 30-dB range and I/Q gain matching accuracy of 0.15 dB is achieved.
