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

Claim 0:
1. An impedance matching circuit comprising:
a reference voltage generator configured to generate a reference voltage;
a code generator configured to generate a first calibration code by comparing the reference voltage with a first voltage associated with a first node and a second calibration code by 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;
a first resistance unit configured to supply the first voltage to the first node in response to the first calibration code to calibrate its resistance to be substantially equal to a reference resistance; and
a second resistance unit configured to supply the second voltage to the second node in response to the second calibration code to calibrate its resistance to the reference resistance.