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1.发明授权公开(公告)号：US12055964B2
公开(公告)日：2024-08-06
申请号：US18299985
申请日：2023-04-13
Applicant: Richtek Technology Corporation
Inventor： Hung-Yu Cheng , Keng-Hong Chu , Li-Chen Cheng , Tsung-Han Yu
CPC classification number: G05F1/565 , G05F1/561 , H03F3/45273 , H03F3/45475 , H03F2200/261
Abstract: A multi-loop error amplifier circuit for generating an error amplification signal includes: a first operational transconductance amplifier (OTA) including a first current output stage which generates a first transconductance amplification current in a predetermined current direction according to a first voltage difference between a positive terminal and a negative input terminal of the first OTA; a second OTA including a second current output stage which generates a second transconductance amplification current in the predetermined current direction according to a second voltage difference between a positive terminal and a negative input terminal of the second OTA. The first and the second current output stages are coupled in series to generate a first error output current. The error amplification signal is generated according to the first error output current which is equal to the smaller one of the first and the second transconductance amplification currents.
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2.发明公开公开(公告)号：US20230359232A1
公开(公告)日：2023-11-09
申请号：US18299985
申请日：2023-04-13
Applicant: Richtek Technology Corporation
Inventor： Hung-Yu Cheng , Keng-Hong Chu , Li-Chen Cheng , Tsung-Han Yu
CPC classification number: G05F1/565 , H03F3/45273 , G05F1/561 , H03F3/45475 , H03F2200/261
Abstract: A multi-loop error amplifier circuit for generating an error amplification signal includes: a first operational transconductance amplifier (OTA) including a first current output stage which generates a first transconductance amplification current in a predetermined current direction according to a first voltage difference between a positive terminal and a negative input terminal of the first OTA; a second OTA including a second current output stage which generates a second transconductance amplification current in the predetermined current direction according to a second voltage difference between a positive terminal and a negative input terminal of the second OTA. The first and the second current output stages are coupled in series to generate a first error output current. The error amplification signal is generated according to the first error output current which is equal to the smaller one of the first and the second transconductance amplification currents.
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