Accordingly, the output voltage Vw at the wiper terminal 106 is a function of the combined resistance of resistors RL2 [(n???1)/2] ???3 and RL2 [(n???1)/2] ???2 of string 362, which is one elemental resistance value greater than the combined resistance of the prior configuration of last resistor RL2 [(n???1)/2] ???2 of string 362 and all of elemental resistor string 364.