Patent ID: 11923866
Assignee: REALTEK SEMICONDUCTOR CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. The digital-to-analog conversion method in claim 7, wherein the input digital codeword comprises a plurality of thermometer codes to control a plurality of thermometer-control current sources of the current sources, the digital-to-analog conversion method further comprises:
categorizing the offset amount corresponding to the different input digital codeword into one of the groups that corresponds to a combination of the thermometer codes and generating an average value of the offset amount of each of the groups by the calibration parameter calculating circuit, wherein the groups are arranged in an order such that for each two of the neighboring groups, the operation state of one of the thermometer-control current sources is at the first current output state and the second current output state respectively; and
generating the current offset of one of the thermometer-control current sources according to a difference of the average value between each two of the neighboring groups by the calibration parameter calculating circuit.