公开(公告)号：JPH06169565A

公开(公告)日：1994-06-14

申请号：JP35066891

申请日：1991-12-12

Applicant: IBM

Inventor： CHI RIAN CHIEN ,  SAN HOO DON ,  HIYUN JIYON SHIN

IPC: G11C11/407 ,  G05F1/56 ,  H02M3/07

Abstract: PURPOSE: To apply differential amplifiers to a small drop-out voltage regulator and improve power source elimination, by connecting a series regulating element with the outputs of the differential amplifiers, making a source-follower and constituting a booster of the differential amplifiers with voltage pump circuits. CONSTITUTION: A series regulating element MN1 connected with the outputs of differential amplifiers MN2-MN4 and MP1-MP2 acts as source-follower. A booster (booster VCC) INT of the differential amplifiers MN2-MN4 and MP1-MP2 is constituted of voltage pump circuits MP4-MP6, CRUMP1-CRUMP2, CSTORE. Gate potentials of the differential amplifiers MN2-MN4 and MP1-MP2 are increased with the voltage pump circuits MP4-MP6, CRUMP1-CRUMP2, CSTORE. Thereby, the differential amplifiers can be applied to a small drop-out voltage regulator, power source elimination can be improved, and lower external power source sensitivity can be obtained.