公开(公告)号：US20030095209A1

公开(公告)日：2003-05-22

申请号：US10299160

申请日：2002-11-18

Applicant: STMICROELECTRONICS S.A.

Inventor： Francois Van Zanten ,  Marc Sabut ,  Raymond Ribas

IPC: H04N005/14

CPC classification number: H04N5/18

Abstract: An input stage for a video receiver includes a variable gain amplifier, an analog-to-digital converter for sampling a video signal and a digital processing unit for processing digital samples of the video signal. An analog regulating circuit sets an input potential at an input of the variable gain amplifier. A differential architecture is used for the variable gain amplifier and the digital analog converter. A conversion circuit between an input coupling capacitor and the variable gain amplifier allows generating the video signal on two channels in antiphase, which are centered on the common mode voltage. Such differential architecture allows reducing the amplitude of analog signals, which is particularly advantageous in the case of a low voltage supply delivering a few volts. In addition, linearity of the video signal processing is enhanced.

Abstract translation: 用于视频接收机的输入级包括可变增益放大器，用于对视频信号进行采样的模数转换器和用于处理视频信号的数字采样的数字处理单元。 模拟调节电路在可变增益放大器的输入端设置输入电位。 差分架构用于可变增益放大器和数字模拟转换器。 输入耦合电容器和可变增益放大器之间的转换电路允许在以共模为中心的反相中的两个通道上产生视频信号。 这种差分架构允许降低模拟信号的幅度，这在低电压电源传送几伏的情况下是特别有利的。 此外，增强了视频信号处理的线性度。

公开(公告)号：US20040263220A1

公开(公告)日：2004-12-30

申请号：US10877747

申请日：2004-06-25

Applicant: STMicroelectronics S.A.

Inventor： Marc Sabut ,  Francois Van Zanten ,  Jean-Luc Moro

IPC: H03B001/00

CPC classification number: H03K17/102 ,  H03K3/356147 ,  H03K17/063

Abstract: A device for controlling a voltage-controlled switch from a digital signal, comprising: a first means for providing the digital signal to the output terminal of the switch; a second means for biasing the switch control terminal to a level greater than the threshold voltage of the switch and smaller than the sum of said threshold voltage and of the maximum voltage of the digital signal; and a third means for adding or subtracting to said level said maximum voltage of the digital signal respectively at the rising and falling edges of the logic inverse of the digital signal.

Abstract translation: 一种用于从数字信号控制压控开关的装置，包括：第一装置，用于将数字信号提供给开关的输出端; 用于将开关控制端子偏置到大于开关的阈值电压的电平并小于所述阈值电压和数字信号的最大电压之和的第二装置; 以及第三装置，用于在数字信号的逻辑反相的上升沿和下降沿分别将数字信号的最大电压加到或减去所述电平。