US 12,292,483 B2
Circuit, semiconductor device and method for parameter PSRR measurement
Amit Kundu, Hsinchu (TW); Jaw-Juinn Horng, Hsinchu (TW); and Yi-Hsiang Wang, Hsinchu (TW)
Assigned to TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD., Hsinchu (TW)
Filed by TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD., Hsinchu (TW)
Filed on Nov. 23, 2023, as Appl. No. 18/518,470.
Application 18/518,470 is a continuation of application No. 17/673,440, filed on Feb. 16, 2022, granted, now 11,860,238.
Application 17/673,440 is a continuation of application No. 17/085,189, filed on Oct. 30, 2020, granted, now 11,280,847, issued on Mar. 22, 2022.
Prior Publication US 2024/0085491 A1, Mar. 14, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 31/40 (2020.01)
CPC G01R 31/40 (2013.01) 20 Claims
OG exemplary drawing
 
1. A circuit for parameter power supply rejection ratio (PSRR) measurement, comprising:
a filter, having an AC signal input terminal, a DC signal input terminal and a combined signal output terminal, the AC signal input terminal for receiving an AC input signal, the DC signal input terminal for receiving a DC input signal, the combined signal output terminal for outputting a combined output signal according to the AC input signal and the DC input signal;
a first regulator, having a first input terminal and a first output terminal, the first input terminal coupled to the combined signal output terminal and receiving the combined output signal, the first output terminal for outputting a first output signal having a first AC component signal and a first DC component signal, the first AC component signal being associated with the AC input signal; and
a second regulator, having a second input terminal and a second output terminal, the second input terminal coupled to the first output terminal and receiving the first output signal, the second output terminal for outputting a second output signal having a second AC component signal and a second DC component signal, the second AC component signal being associated with the first AC component signal,
wherein the parameter PSRR of the second regulator is configured to be obtained according to a ratio between the second AC component signal and the first AC component signal, and the first regulator is the same as the second regulator.