10. The method of operating an electrically programmable load according to claim 8 , wherein said control word component value is one of three different biasing values, each load unit element having a maximum admittance of Y U,max for a first one of said three different biasing values, an intermediate admittance of Y U,mid for a second one of said three different biasing values, or a minimum admittance of Y U,min for a third one of said three different biasing values, and the method comprises generating said three different biasing values such that the following relation holds: 
 Y U,max =αY U,min 
 Y U,mid =βY U,min β=α/p, where p is a real number larger than 1.
8. A method of operating an electrically programmable load having an impedance value dependent on a received control word, the electrically programmable load comprising a plurality of parallel load units, each load unit comprising at least one load unit element having a load unit element impedance value which depends on a control word component value of a respective control word component, the method comprising the steps of: providing said respective control word component to each load unit element, said control word component value being one of three or more different biasing values.