公开(公告)号：US20210378066A1

公开(公告)日：2021-12-02

申请号：US16885507

申请日：2020-05-28

Applicant: STMicroelectronics S.r.l.

Inventor： Salvatore Difazio ,  Stefano Corradi ,  Giuseppe Calcagno

IPC: H05B45/345 ,  H03M1/78

Abstract: An apparatus includes a digital-to-analog converter coupled in series with a source follower, wherein the digital-to-analog converter is configured to control a current flowing through the source follower, and an amplifier having a first input coupled to a reference generator, a second input coupled to a common node of the source follower and the digital-to-analog converter, and an output coupled to a gate of the source follower.

公开(公告)号：US20180117630A1

公开(公告)日：2018-05-03

申请号：US15586777

申请日：2017-05-04

Applicant: STMicroelectronics S.r.l.

Inventor： Giuseppe Calcagno ,  Domenico Cristaudo ,  Stefano Corradi

IPC: B06B1/02 ,  H03G3/20 ,  H03F3/45 ,  H03F1/02 ,  B06B1/06

CPC classification number: B06B1/0215 ,  B06B1/0603 ,  B06B1/0644 ,  H03F1/02 ,  H03F1/0233 ,  H03F1/0255 ,  H03F3/45 ,  H03F3/45475 ,  H03F2203/45248 ,  H03G1/00 ,  H03G3/001 ,  H03G3/007 ,  H03G3/20 ,  H03G2201/40

Abstract: A differential amplifier generates an output voltage waveform exhibiting a slew rate over a rise time. The amplifier is powered from a dc voltage input and includes a set of differential pairs having a bias current flowing therethrough and a Miller compensation capacitance. A comparator functions to compare a voltage at the dc voltage input against a reference voltage in order to detect when the voltage drops below the reference voltage. A gain stage controls the gain of the differential amplifier and a bias current control circuit controls the bias current of the differential amplifier. In response to the detection by the comparator of the voltage dropping below the reference voltage, the gain stage and the bias current control circuit decrease the gain of the amplifier and jointly decrease the bias current in order to maintain a value of the rise time.

公开(公告)号：US11212893B2

公开(公告)日：2021-12-28

申请号：US16885507

申请日：2020-05-28

Applicant: STMicroelectronics S.r.l.

Inventor： Salvatore Difazio ,  Stefano Corradi ,  Giuseppe Calcagno

IPC: H05B45/34 ,  H03M1/78 ,  H05B45/345

Abstract: An apparatus includes a digital-to-analog converter coupled in series with a source follower, wherein the digital-to-analog converter is configured to control a current flowing through the source follower, and an amplifier having a first input coupled to a reference generator, a second input coupled to a common node of the source follower and the digital-to-analog converter, and an output coupled to a gate of the source follower.

公开(公告)号：US08803604B2

公开(公告)日：2014-08-12

申请号：US13758031

申请日：2013-02-04

Applicant: STMicroelectronics S.R.L.

Inventor： Giovanni Conti ,  Domenico Cristaudo ,  Stefano Corradi

IPC: H03G3/00

CPC classification number: H05B37/02 ,  G09G3/3233 ,  G09G3/3291 ,  G09G2320/0233 ,  G09G2330/028

Abstract: A control circuit is for generating upper and lower voltages that define a range of a data voltage for controlling a driving transistor of an electroluminescent component coupled to a supply line through the driving transistor. The control circuit may include a first input terminal configured to have a common voltage, and a pair of amplifiers coupled together at the first input terminal and configured to generate the upper voltage and the lower voltage to correspond to a difference between the common voltage and, respectively, first and second analog intermediate voltages representing respective threshold values of the upper voltage and of the lower voltage. The control circuit may include an auxiliary amplifier configured to adjust the upper voltage and the lower voltage based upon fluctuations of an input voltage, and generate the common voltage to correspond to the difference between the input voltage and a reference voltage.

Abstract translation: 控制电路用于产生限定用于控制通过驱动晶体管耦合到电源线的电致发光元件的驱动晶体管的数据电压的范围的上限和下限电压。 控制电路可以包括被配置为具有公共电压的第一输入端子和在第一输入端子耦合在一起的一对放大器，并且被配置为产生上限电压和较低电压以对应于公共电压之间的差， 分别表示表示上部电压和较低电压的相应阈值的第一和第二模拟中间电压。 控制电路可以包括辅助放大器，其被配置为基于输入电压的波动来调节上限电压和较低电压，并且产生公共电压以对应于输入电压和参考电压之间的差。

公开(公告)号：US20130207569A1

公开(公告)日：2013-08-15

申请号：US13758031

申请日：2013-02-04

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Giovanni CONTI ,  Domenico Cristaudo ,  Stefano Corradi

IPC: H05B37/02

CPC classification number: H05B37/02 ,  G09G3/3233 ,  G09G3/3291 ,  G09G2320/0233 ,  G09G2330/028

Abstract: A control circuit is for generating upper and lower voltages that define a range of a data voltage for controlling a driving transistor of an electroluminescent component coupled to a supply line through the driving transistor. The control circuit may include a first input terminal configured to have a common voltage, and a pair of amplifiers coupled together at the first input terminal and configured to generate the upper voltage and the lower voltage to correspond to a difference between the common voltage and, respectively, first and second analog intermediate voltages representing respective threshold values of the upper voltage and of the lower voltage. The control circuit may include an auxiliary amplifier configured to adjust the upper voltage and the lower voltage based upon fluctuations of an input voltage, and generate the common voltage to correspond to the difference between the input voltage and a reference voltage.

Abstract translation: 控制电路用于产生限定用于控制通过驱动晶体管耦合到电源线的电致发光元件的驱动晶体管的数据电压的范围的上限和下限电压。 控制电路可以包括被配置为具有公共电压的第一输入端子和在第一输入端子耦合在一起的一对放大器，并且被配置为产生上限电压和较低电压以对应于公共电压之间的差， 分别表示表示上部电压和较低电压的相应阈值的第一和第二模拟中间电压。 控制电路可以包括辅助放大器，其被配置为基于输入电压的波动来调节上限电压和较低电压，并且产生公共电压以对应于输入电压和参考电压之间的差。