An anti-aliasing filter that incorporates a sampler is proposed to precede oversampling analog-to-digital converters, such as discrete-time ???? modulators. The architecture of the proposed anti-aliasing filter is inspired by the implicit anti-aliasing filtering property of CT ???? modulators. However, contrary to CT ???? modulators, the proposed anti-aliasing filter is not sensitive to clock jitter. Furthermore, its key characteristics include: 1) higher suppression of aliases, compared to a Butterworth filter of the same order (same number of opamps);