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An active filter with a 50 &#x2126; buffer suitable as an anti-alias filter to drive a highly linear ADC is implemented in 0.13 &#x00B5;m SiGe BiCMOS. This 6<sup>th</sup>-order Chebyshev filter has a 3 dB cutoff frequency of 28.3 MHz and achieves 36.5 dBm OIP<inf>3</inf>. Nonlinear digital equalization further improves OIP<inf>3</inf> to 43.6 dBm.(More)
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