Which filter type is described as having ripple in the passband and a sharp cutoff?

A Chebyshev filter is designed to provide a much steeper roll-off (sharper cutoff) between the passband and the stopband than a Butterworth filter. However, this mathematical design trade-off results in 'ripple' (amplitude variations) within the passband itself. This makes Chebyshev filters highly effective when you need to strictly block frequencies just outside your desired range, provided the application can tolerate slight fluctuations in the allowed signal. The Butterworth filter is the wrong choice here, as it is famous for the exact opposite traits: a flat passband with a gentler cutoff.