公开(公告)号：US20230283252A1

公开(公告)日：2023-09-07

申请号：US18116124

申请日：2023-03-01

Applicant: STMicroelectronics (Alps) SAS

Inventor： Kuno LENZ

IPC: H03F3/45

CPC classification number: H03F3/45475 ,  H03F2200/375 ,  H03F2203/45212

Abstract: An internal voltage offset between a positive input and a negative input of a first operational amplifier is compensated. The negative input and the positive input of the first operational amplifier are coupled at the same voltage level. A comparison current generated at an output of the first operational amplifier has a sign that is representative of a sign of the internal voltage offset. The output of the first operational amplifier is biased to a threshold voltage using a current-to-voltage converter. A control voltage is generated from a sum of the threshold voltage and a voltage conversion of the comparison current. Compensation for the internal voltage offset between the positive and negative inputs of the first operational amplifier is made dependent on the control voltage.