A highly linear 125-MHz CMOS switched-resistor programmable-gain amplifier
作者： Cheng-Chung Hsu , Jieh-Tsorng Wu
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摘要: A highly linear programmable-gain amplifier (PGA) is fabricated using a 0.35-/spl mu/m CMOS technology. High linearity and constant wide bandwidth are achieved by high-gain with low input impedance resistor-network feedback. The voltage gain varied digitally controlling the switched resistors. distortion of resistor has been analyzed Volterra series. PGA varying from 0 to 19 dB, while maintaining 125 MHz. third-order intermodulation -86dB at 10 circuit dissipates 21 mW 3.3-V supply.
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