More specifically, the means for converting the digital control signal to the first and second currents comprises a plurality of current sources, weighted in accordance with the binary weights of {HEAD ~ respective bits} in {TAIL ~ 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 
More specifically , the means for converting the digital control signal to the first and second currents comprises a plurality of current sources , weighted in accordance with the binary weights of { HEAD ~ respective bits } in { TAIL ~ 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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