Patent ID: 11860238
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 17:
18. A method for obtaining parameter power supply rejection ratio (PSRR) using a measurement circuit, comprising:
inputting an AC input signal and a DC input signal to a filter of the measurement circuit;
outputting a combined output signal of the filter to a first regulator of the measurement circuit, the combined output signal being associated with the AC input signal and the DC input signal;
measuring a first output signal of the first regulator using a first probe, the first output signal having a first AC component signal VAC1 and a first DC component signal, the first output signal being associated with the combined output signal;
outputting the first output signal of the first regulator to a second regulator of the measurement circuit; and
measuring a second output signal of the second regulator using a second probe, the second output signal having a second AC component signal VAC2 and a second DC component signal, the second output signal being associated with the first output signal;
wherein the parameter PSRR of the second regulator is obtained according to equation PSRR=20*log(VAC2/VAC1).