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

Claim 0:
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 output signal being associated with the combined output 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 output signal being associated with the first output signal, and
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.