A High Power-supply Rejection,Low Noise and Low Voltage Difference Regulator
Jie Liang · 2012
A high power-supply rejection,low noise and low voltage difference regulator structure is proposed.The current mirror and the voltage control current source are applied to eliminate a low frequency poles and improve the stability of the system.At 1 kHz PSR rise up to 100 dB,at 1 MHz PSR is higher than 40 dB,and maximum current output is 150 mA.In addition,this circuit includes the start-up circuit and the current limit circuit,so that it can effectively assure normal work. The 130 nm TSMC low power consumption process is adopted,the measurement results show that chip has good noise characteristics,high stability,high power-supply rejection,effectively guarantee the system specifications.