a control signal generation circuit configured to generate at least one control signal based, at least in part, on an indicator of a range of a duty cycle adjustment selected from a plurality of ranges of duty cycle adjustment and an indicator of a number of units of duty cycle adjustment selected from a total number of units of duty cycle adjustment spanning the selected range of duty cycle adjustment; and

at least one duty cycle adjustment circuit configured to adjust a duty cycle of a reference clock signal based, at least in part, on the at least one control signal, thereby generating an adjusted version of the reference clock signal.