Patent ID: 11936356
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 17:
18. A method for calibrating an impedance of a device, the method comprising:
generating a reference voltage;
generating, by a code generator, a first calibration code based on comparing the reference voltage with a first voltage associated with a first node;
calibrating, based on the first calibration code a resistance value of a first resistance unit to be substantially equal to a reference resistance, wherein the first resistance unit is connected to the first node;
generating, by the code generator, a second calibration code based on comparing the reference voltage with a second voltage associated with a second node, wherein the code generator comprises a first multiplexer and a comparator, wherein the first multiplexer selects one of the first voltage and the second voltage and provides the selected voltage to a first input terminal of the comparator; and
calibrating, based on the second calibration code, a resistance value of a second resistance unit to be substantially equal to the reference resistance, wherein the second resistance unit is connected to the second node.