公开(公告)号：US09568927B2

公开(公告)日：2017-02-14

申请号：US14270677

申请日：2014-05-06

Applicant: STMicroelectronics, Inc. ,  STMicroelectronics S.r.l.

Inventor： Tom Youssef ,  Alessandro Gasparini ,  Yamu Hu ,  Naren K. Sahoo ,  Anthony Junior Casillan

IPC: G05F1/00 ,  G05F1/56 ,  G05F1/10

CPC classification number: G05F1/561 ,  G05F1/10

Abstract: A modulated digital input signal is passed through a conditioning circuit to generate a first input signal. An error amplifier circuit receives the first input signal and a second input signal, and controls the operation of a MOS transistor to generate an output signal that is current modulated. The output signal is sensed to generate a feedback signal. A switching circuit selectively applies the feedback signal as the second input signal in response to a transition of the modulated digital input signal from a first logic state to a second logic state. The switching circuit alternatively selectively applies a fixed reference signal as the second input signal to the error amplifier in response to a transition of the modulated digital input signal from the second logic state to the first logic state.

Abstract translation: 调制数字输入信号通过调理电路以产生第一输入信号。 误差放大器电路接收第一输入信号和第二输入信号，并且控制MOS晶体管的操作以产生电流调制的输出信号。 感测输出信号以产生反馈信号。 响应于调制的数字输入信号从第一逻辑状态到第二逻辑状态的转变，开关电路选择性地将反馈信号作为第二输入信号施加。 响应于调制的数字输入信号从第二逻辑状态到第一逻辑状态的转变，开关电路交替地选择性地将固定参考信号作为第二输入信号施加到误差放大器。

公开(公告)号：US20150323944A1

公开(公告)日：2015-11-12

申请号：US14270677

申请日：2014-05-06

Applicant: STMICROELECTRONICS, INC. ,  STMICROELECTRONICS S.R.L.

Inventor： Tom Youssef ,  Alessandro Gasparini ,  Yamu Hu ,  Naren K. Sahoo ,  Anthony Junior Casillan

IPC: G05F1/10

CPC classification number: G05F1/561 ,  G05F1/10

Abstract: A modulated digital input signal is passed through a conditioning circuit to generate a first input signal. An error amplifier circuit receives the first input signal and a second input signal, and controls the operation of a MOS transistor to generate an output signal that is current modulated. The output signal is sensed to generate a feedback signal. A switching circuit selectively applies the feedback signal as the second input signal in response to a transition of the modulated digital input signal from a first logic state to a second logic state. The switching circuit alternatively selectively applies a fixed reference signal as the second input signal to the error amplifier in response to a transition of the modulated digital input signal from the second logic state to the first logic state.

Abstract translation: 调制数字输入信号通过调理电路以产生第一输入信号。 误差放大器电路接收第一输入信号和第二输入信号，并且控制MOS晶体管的操作以产生电流调制的输出信号。 感测输出信号以产生反馈信号。 响应于调制的数字输入信号从第一逻辑状态到第二逻辑状态的转变，开关电路选择性地将反馈信号作为第二输入信号施加。 响应于调制的数字输入信号从第二逻辑状态到第一逻辑状态的转变，开关电路交替地选择性地将固定参考信号作为第二输入信号施加到误差放大器。