公开(公告)号：US20180131342A1

公开(公告)日：2018-05-10

申请号：US15587579

申请日：2017-05-05

Applicant: STMicroelectronics S.r.l.

Inventor： Marco Zamprogno ,  Maurizio Bongiorni ,  Pasquale Flora

IPC: H03G3/30 ,  H02J7/00 ,  H03F3/45

CPC classification number: H03G3/30 ,  H02J7/0063 ,  H02J7/345 ,  H03F3/087 ,  H03F3/45475 ,  H03F3/45973 ,  H03F3/45977 ,  H03F2203/45021 ,  H03F2203/45114 ,  H03F2203/45116 ,  H03F2203/45212 ,  H03F2203/45288 ,  H03F2203/45528 ,  H03F2203/45536 ,  H04B10/6933

Abstract: A transimpedance amplifier circuit includes a feedback control loop that generates a compensation current at an input of a transimpedance amplifier. The feedback control loop includes a differential integrator with an integration capacitor. A time constant associated with charging the integration capacitor is variable as a function of a pre-charge control signal. During a pre-charge phase, the pre-charge control signal is set to a first value so as to set the time constant associated with charging the integration capacitor to a first time constant value. During an operation phase, the pre-charge control signal is set to a second value so as to increase the time constant associated with charging the integration capacitor to a second time constant value greater than the first time constant value for the pre-charge phase.

公开(公告)号：US10348258B2

公开(公告)日：2019-07-09

申请号：US15975505

申请日：2018-05-09

Applicant: STMicroelectronics S.r.l.

Inventor： Marco Zamprogno ,  Maurizio Bongiorni ,  Pasquale Flora

IPC: H03F3/45 ,  H03F1/02

Abstract: A single-stage differential operational amplifier including an input stage formed by a pair of input transistors having control terminals connected to a respective first and second input, first conduction terminals coupled to a respective first and second output and second conduction terminals coupled to receive a polarization current. An output stage is formed by a pair of output transistors in diode configuration and having control terminals coupled to a relative first conduction terminal and connected to a respective first and second output, and second conduction terminals connected to a reference line. A coupling stage is interposed between the first conduction terminals of the output transistors and the first and second outputs to define the diode configuration of the output transistors and a gain value of the operational amplifier.

公开(公告)号：US10187026B2

公开(公告)日：2019-01-22

申请号：US15587579

申请日：2017-05-05

Applicant: STMicroelectronics S.r.l.

Inventor： Marco Zamprogno ,  Maurizio Bongiorni ,  Pasquale Flora

IPC: H03F3/08 ,  H03G3/30 ,  H02J7/00 ,  H03F3/45 ,  H04B10/69 ,  H02J7/34

Abstract: A transimpedance amplifier circuit includes a feedback control loop that generates a compensation current at an input of a transimpedance amplifier. The feedback control loop includes a differential integrator with an integration capacitor. A time constant associated with charging the integration capacitor is variable as a function of a pre-charge control signal. During a pre-charge phase, the pre-charge control signal is set to a first value so as to set the time constant associated with charging the integration capacitor to a first time constant value. During an operation phase, the pre-charge control signal is set to a second value so as to increase the time constant associated with charging the integration capacitor to a second time constant value greater than the first time constant value for the pre-charge phase.

公开(公告)号：US20180342994A1

公开(公告)日：2018-11-29

申请号：US15975505

申请日：2018-05-09

Applicant: STMicroelectronics S.r.l.

Inventor： Marco Zamprogno ,  Maurizio Bongiorni ,  Pasquale Flora

IPC: H03F3/45

CPC classification number: H03F3/45273 ,  H03F1/0205 ,  H03F3/45183 ,  H03F3/45188 ,  H03F3/45192 ,  H03F3/45632 ,  H03F2200/513 ,  H03F2203/45654

Abstract: A single-stage differential operational amplifier including an input stage formed by a pair of input transistors having control terminals connected to a respective first and second input, first conduction terminals coupled to a respective first and second output and second conduction terminals coupled to receive a polarization current. An output stage is formed by a pair of output transistors in diode configuration and having control terminals coupled to a relative first conduction terminal and connected to a respective first and second output, and second conduction terminals connected to a reference line. A coupling stage is interposed between the first conduction terminals of the output transistors and the first and second outputs to define the diode configuration of the output transistors and a gain value of the operational amplifier.