Patent ID: 6950047
Filing Date: 2005-09-27
Classification: H03M

Abstract:
1. A method for providing an increased bit resolution to a data converter operable to convert digital information to analog values, comprising the steps of: controlling in a first step of controlling a first current Digital-to-Analog (IDAC) converter to provide a first current through a first output node, the first IDAC having a first current step size associated with the Least Significant Bit (LSB) thereof; and controlling in a second step of controlling a second IDAC to provide a second current through the first output node, the second IDAC having a second current step size associated with the LSB thereof that is smaller than the first current step size; wherein the current through the first output node is the sum of the first and second currents; wherein the combination of the first and second IDACs increases the bit resolution of the first IDAC when driving the first output node with the addition of the second IDAC.