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引用次数: 5
摘要
提出了一种低压低功耗模拟基带IC，采用两步通道选择架构，用于802.11a/b/g的灵活中频接收。在电路中，它集成了创新的串行开关混频器，用于精确的I/Q解调;一个内运放直流偏置消除，以节省面积和可切换性，一个开关电流电阻可编程增益放大器，用于无瞬变恒定带宽增益调节。在0.35 μ m CMOS工艺中制造，每个通道从1V消耗14mW，同时测量<1mus增益切换瞬态，32/90dB阻带抑制，20/40MHz和15.2dBm IIP3
A 1V 14mW-per-Channel Flexible-IF CMOS Analog-Baseband IC for 802.11a/b/g Receivers
Presented is a low-voltage low-power analog-baseband IC featuring a two-step channel-selection architecture for a flexible-IF reception of 802.11a/b/g. In circuits, it integrates innovatively series-switching mixers for a precise I/Q demodulation; an inside-opamp dc-offset cancellation for area savings and switchability, a switched-current-resistor programmable-gain amplifier for a transient-free constant-bandwidth gain adjustment. Fabricated in a 0.35mum CMOS process, each channel consumes 14mW from 1V, while measuring <1mus gain-switched transient, 32/90dB stopband rejection at 20/40MHz and 15.2dBm IIP3
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