公开(公告)号：US11658624B2

公开(公告)日：2023-05-23

申请号：US17461123

申请日：2021-08-30

Applicant: STMicroelectronics International N.V.

Inventor： Riju Biswas ,  Ratul Mitra

IPC: H03F3/45

CPC classification number: H03F3/45085 ,  H03F3/45475 ,  H03F2203/45006 ,  H03F2203/45026 ,  H03F2203/45048 ,  H03F2203/45084 ,  H03F2203/45088 ,  H03F2203/45211

Abstract: Disclosed herein is a method including sinking current from a pair of input transistors of a differential amplifier while sourcing more current to the pair of input transistors than is sunk. The method further includes generating a pair of input differential signals using a pair of input voltage regulators, and amplifying a difference between the pair of input differential signals to produce a pair of differential output voltages, using the differential amplifier. The method also includes amplifying the pair of differential output voltages using at least one voltage gain amplifier, and generating control signals for current sources that source the current to the pair of input transistors of the differential amplifier, from the pair of differential output voltages after at least amplification.

公开(公告)号：US11121687B1

公开(公告)日：2021-09-14

申请号：US16861602

申请日：2020-04-29

Applicant: STMicroelectronics International N.V.

Inventor： Riju Biswas ,  Ratul Mitra

IPC: H03F3/45

Abstract: Disclosed herein is a circuit including a differential amplifier having a pair of input transistors coupled in a differential arrangement between adjustable current sources and receiving input differential signals from a pair of input voltage regulators. The adjustable current sources are configured to source more current to the pair of input transistors than current that is sunk from the pair of input transistors. A first amplifier has inputs coupled to receive differential output voltages from the differential amplifier. A second amplifier has inputs coupled to receive amplified differential output voltages from the first amplifier. A low pass filter has inputs coupled to receive further amplified differential output voltages from the second amplifier and produce final differential output voltages.