Patent ID: 7414558

Claim:
A method for converting a digital signal to an analog signal, said method using a plurality of signal sources, preferably current sources, one or more of said signal sources being variable output signal magnitude sources, said method comprising: setting the output signal magnitudes of the one or more variable output signal magnitude sources by one or more individual setting signals being input signals for said respective variable output signal magnitude sources contributing to said analog signal, wherein said converting is adapted on a per signal basis in response to needs concerning bandwidth and/or accuracy for achieving a trade-off between sample-rate and resolution of said conversion, wherein said output signal of said variable output signal magnitude sources are switchable according to a switch control signal provided by a logic unit, thus contributing or not to said analog signal, said switch control signal being derived from said digital signal to be converted, and wherein said logic unit is part of a flexible selection unit, and wherein said digital signal to be converted is an input signal of said flexible selection unit, and operation of said flexible selection unit is software controlled by parameters determining processing of said digital signal to be converted, for achieving a trade-off between sample-rate and resolution of said conversion and hardware filtering effort.