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

Claim 2:
3. The digital-to-analog conversion apparatus in claim 1, 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 calibration parameter calculating circuit is further configured to:
categorize 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 generate an average value of the offset amount of each of the groups, 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
generate 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.