公开(公告)号：US20130076404A1

公开(公告)日：2013-03-28

申请号：US13685131

申请日：2012-11-26

Applicant: VIA TECHNOLOGIES, INC.

Inventor： Yeong-Sheng LEE ,  Kuen-Chir WANG

IPC: H03K17/04 ,  H03K17/00

CPC classification number: H03K17/04 ,  H03K17/002 ,  H03K19/018528 ,  H04L25/0272 ,  H04L25/0278

Abstract: A low voltage differential signal driving circuit including positive and negative differential output terminals, an automatic level selector, an output level detector and a transition accelerator. The positive and negative differential output terminals provide a transmission interface with a differential output signal for transmission of a data signal. The automatic level selector outputs a reference voltage corresponding to the transmission interface. The output level detector generates a low-high (or high-low) transition acceleration control signal based on the data signal, the reference voltage, and VTXP signal at the positive differential output terminal (or VTXN signal at the negative differential output terminal). In accordance with the low-high (or high-low) transition acceleration control signal, the transition accelerator couples the positive (or negative) differential output terminal to a high voltage source and couples the negative (or positive) differential output terminal to a low voltage source to accelerate transition of the differential output signal.

Abstract translation: 包括正和负差分输出端子的低电压差分信号驱动电路，自动电平选择器，输出电平检测器和转换加速器。 正和负差分输出端子提供具有用于传输数据信号的差分输出信号的传输接口。 自动电平选择器输出与传输接口对应的参考电压。 输出电平检测器基于正差分输出端子（或负差分输出端子处的VTXN信号）的数据信号，参考电压和VTXP信号产生低电平（或高 - 低）转换加速控制信号。 根据低 - 高（或高 - 低）转换加速度控制信号，转换加速器将正（或负）差分输出端耦合到高电压源，并将负（或正）差分输出端耦合到低电平 电压源加速差分输出信号的转换。

公开(公告)号：US20130099840A1

公开(公告)日：2013-04-25

申请号：US13644403

申请日：2012-10-04

Applicant: VIA TECHNOLOGIES, INC.

Inventor： Yeong-Sheng LEE ,  Kuen-Chir WANG

IPC: H03K3/017

CPC classification number: H02M3/156

Abstract: A duty adjustment circuit is provided. The duty adjustment circuit is used to adjust a duty cycle of a first driving signal. The duty adjustment circuit includes a filter, a first comparator, and a first duty adjustor. The filter receives a comparison result signal and filters the comparison result signal to generate a duty information signal. The duty information signal indicates a duty cycle of the comparison result signal. The first comparator receives the duty information signal and determines whether a direct-current (DC) level of the duty information signal falls into a predefined voltage range to generate a first adjustment signal. The first duty adjustor receives the first adjustment signal and the first driving signal and adjusts the duty cycle of the first driving signal according to the first adjustment signal.

Abstract translation: 提供了一个占空比调整电路。 占空比调整电路用于调整第一驱动信号的占空比。 占空比调节电路包括滤波器，第一比较器和第一占空比调节器。 滤波器接收比较结果信号并对比较结果信号进行滤波以产生占空比信息信号。 占空信息信号表示比较结果信号的占空比。 第一比较器接收占空信息信号，并确定占空比信息信号的直流（DC）电平是否落入预定的电压范围以产生第一调整信号。 第一负载调节器接收第一调整信号和第一驱动信号，并根据第一调整信号调整第一驱动信号的占空比。