{HEAD ~ More specifically, the means} for converting {TAIL ~ the digital control signal} to the first and second currents comprises a plurality of current sources, weighted in accordance with the binary weights of respective bits in the digital control signal; and an equal plurality of two position switches coupled to the respective current sources and having first and second output terminals 
{ HEAD ~ More specifically , the means } for converting { TAIL ~ the digital control signal } to the first and second currents comprises a plurality of current sources , weighted in accordance with the binary weights of respective bits in the digital control signal ; and an equal plurality of two position switches coupled to the respective current sources and having first and second output terminals
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