公开(公告)号：US09035639B2

公开(公告)日：2015-05-19

申请号：US13711454

申请日：2012-12-11

Applicant: STMicroelectronics Design and Application S.R.O.

Inventor： Martin Drinovsky

IPC: G05F1/00 ,  G05F1/46 ,  G05F1/56 ,  H02M3/156 ,  H02M1/00

CPC classification number: G05F1/46 ,  G05F1/561 ,  H02M3/156 ,  H02M2001/0009

Abstract: The present disclosure is directed to a voltage-to-current sensing circuit having a bias terminal configured to receive a reference voltage, an offset terminal configured to receive an offset current, and an operational amplifier configured to output a low voltage signal. The device includes a first amplifier having first and second high voltage inputs configured to receive a first voltage difference across a sense component on a high voltage line and to generate a first current, a second amplifier having first and second low voltage inputs configured to receive a second voltage difference between the bias terminal and the offset terminal and to generate a second current, a summing circuit configured to provide an intermediate voltage corresponding to a sum of the first and the second currents, and a low-voltage transistor coupled to an output of the amplifier and controlled by the intermediate voltage to generate the output current.

Abstract translation: 本公开涉及具有被配置为接收参考电压的偏置端子的电压到电流感测电路，被配置为接收偏移电流的偏移端子和被配置为输出低电压信号的运算放大器。 该器件包括具有第一和第二高电压输入的第一放大器，该第一和第二高电压输入被配置为接收高电压线上的感测元件上的第一电压差并产生第一电流，第二放大器具有第一和第二低电压输入， 偏置端子和偏移端子之间的第二电压差并产生第二电流，求和电路被配置为提供对应于第一和第二电流的和的中间电压，以及耦合到第一和第二电流的输出的低压晶体管 该放大器由中间电压控制，以产生输出电流。

公开(公告)号：US20130154595A1

公开(公告)日：2013-06-20

申请号：US13711454

申请日：2012-12-11

Applicant: STMicroelectronics Design and Application S.R.O

Inventor： Martin Drinovsky

IPC: G05F1/46

CPC classification number: G05F1/46 ,  G05F1/561 ,  H02M3/156 ,  H02M2001/0009

Abstract: The present disclosure is directed to a voltage-to-current sensing circuit having a bias terminal configured to receive a reference voltage, an offset terminal configured to receive an offset current, and an operational amplifier configured to output a low voltage signal. The device includes a first amplifier having first and second high voltage inputs configured to receive a first voltage difference across a sense component on a high voltage line and to generate a first current, a second amplifier having first and second low voltage inputs configured to receive a second voltage difference between the bias terminal and the offset terminal and to generate a second current, a summing circuit configured to provide an intermediate voltage corresponding to a sum of the first and the second currents, and a low-voltage transistor coupled to an output of the amplifier and controlled by the intermediate voltage to generate the output current.

Abstract translation: 本公开涉及具有被配置为接收参考电压的偏置端子的电压到电流感测电路，被配置为接收偏移电流的偏移端子和被配置为输出低电压信号的运算放大器。 该器件包括具有第一和第二高电压输入的第一放大器，该第一和第二高电压输入被配置为接收高电压线上的感测元件上的第一电压差并产生第一电流，第二放大器具有第一和第二低电压输入， 偏置端子和偏移端子之间的第二电压差并产生第二电流，求和电路被配置为提供对应于第一和第二电流的和的中间电压，以及耦合到第一和第二电流的输出的低压晶体管 该放大器由中间电压控制，以产生输出电流。