公开(公告)号：US20030062964A1

公开(公告)日：2003-04-03

申请号：US10232954

申请日：2002-08-29

Applicant: STMicroelectronics S.A.

Inventor： Yannick Guedon ,  Philippe Maige

IPC: H03K007/08

CPC classification number: H03K7/08 ,  H03K5/26 ,  H03L7/099 ,  H03L2207/06

Abstract: A circuit for generating a pulse-width-modulated signal comprises a phase-locked loop (PLL) having a duty-cycle-insensitive phase comparator and a Sigma-Delta pulse width modulation circuit suitable for providing the voltage-controlled oscillator function of the PLL. Thereby, frequency of the signal generated is synchronized by the PLL to the specified frequency of a synchronization signal, and is thus independent of the duty cycle.

Abstract translation: 用于产生脉宽调制信号的电路包括具有占空比不敏感相位比较器和适用于提供PLL的压控振荡器功能的Σ-Δ脉宽调制电路的锁相环（PLL） 。 因此，所生成的信号的频率由PLL同步到同步信号的指定频率，因此与占空比无关。

公开(公告)号：US20020130246A1

公开(公告)日：2002-09-19

申请号：US10072670

申请日：2002-02-06

Applicant: STMICROELECTRONICS S.A.

Inventor： Philippe Maige ,  Yannick Guedon

IPC: H01J040/14

CPC classification number: H04N3/16 ,  H03K4/625 ,  H03K4/696

Abstract: Disclosed is a device to control a circuit for the vertical deflection of a spot scanning a screen, and more particularly a control device whose output amplifier stage works in class D mode at the rate of a switching signal called a first switching signal. The control device has an internal auxiliary supply to generate the overvoltage needed for the fast flyback of the spot. This auxiliary power supply is a switching voltage generation circuit whose switching signal, called a second switching signal, is synchronous with the first switching signal. The present invention has been shown to used advantageously in television screens and/or computer screens.

Abstract translation: 公开了一种用于控制用于扫描屏幕的点扫描的垂直偏转的电路的装置，更具体地说，一种控制装置，其输出放大器级以D类模式以称为第一开关信号的开关信号的速率工作。 控制装置具有内部辅助电源，以产生快速反激所需的过电压。 该辅助电源是切换电压生成电路，其切换信号（称为第二切换信号）与第一切换信号同步。 已经显示出本发明有利地用于电视屏幕和/或计算机屏幕。