ZHCSIC7H March 2016 – November 2019 DRA722 , DRA724 , DRA725 , DRA726
PRODUCTION DATA.
To evaluate the frequency of a digital signal, an estimated rule of thumb is to consider its bandwidth fBW with respect to its rise time, tR:
fBW ≈ 0.35 / tR
This frequency actually corresponds to the break point in the signal spectrum, where the harmonics start to decay at 40 dB per decade instead of 20 dB per decade.