US 11,693,440 B2
Voltage regulator
Kuo-Wei Chang, Taipei (TW)
Assigned to GUTSCHSEMI LIMITED, Hong Kong (HK)
Filed by GUTSCHSEMI LIMITED, Hong Kong (HK)
Filed on Aug. 24, 2021, as Appl. No. 17/409,801.
Claims priority of provisional application 63/192,583, filed on May 25, 2021.
Prior Publication US 2022/0382309 A1, Dec. 1, 2022
Int. Cl. G05F 1/575 (2006.01); G05F 1/56 (2006.01)
CPC G05F 1/575 (2013.01) [G05F 1/56 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A voltage regulator, comprising:
a main error amplifier, configured to generate a first voltage signal according to a reference voltage signal and a feedback voltage signal, and output the first voltage signal through an output terminal of the main error amplifier;
a first buffer, coupled to the output terminal of the main error amplifier, and configured to receive the first voltage signal, provide a second voltage signal according to the first voltage signal, and output the second voltage signal at an output terminal of the first buffer;
a second buffer, coupled to the output terminal of the first buffer, and configured to receive the second voltage signal and provide an output voltage signal according to the second voltage signal; and
a plurality of main zero compensation loops, respectively coupled between the output terminal of the main error amplifier and the output terminal of the first buffer, and configured to provide a plurality of zero compensations which are different.