专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明授权

US07499557B1 Driving method of speaker and the driving circuit thereof 有权
标题翻译：扬声器的驱动方法及其驱动电路
公开(公告)号：US07499557B1
公开(公告)日：2009-03-03
申请号：US09399729
申请日：1999-09-20
申请人： Brian Yang , Kuo-hsiang Chen , Fu-yuan Cheng
发明人： Brian Yang , Kuo-hsiang Chen , Fu-yuan Cheng
IPC分类号： H04R3/00
CPC分类号： H03M1/68 , H03F3/217 , H03K7/08 , H03M1/745 , H03M1/822
摘要： The present invention relates to a driving method of speaker and the driving circuit thereof by employing the technique of converting digital sound signals into corresponding driving signals to drive the speaker. The driving method of the speaker comprises the steps of dividing the digital sound data into higher bits data group and lower bits data group, converting one data group into driving signals represented as pulse height, and modulating the other data group into driving signals represented as pulse width. The driving circuit comprises pulse width modulation (PWM) circuit for modulating one data group into driving signals represented as pulse width and digital analog conversion circuit for converting the other data group into driving signals represented as pulse height.
摘要翻译：扬声器的驱动方法及其驱动电路技术领域本发明涉及扬声器的驱动方法及其驱动电路，该方法采用将数字声音信号转换成相应的驱动信号来驱动扬声器的技术。扬声器的驱动方法包括以下步骤：将数字声音数据分割为较高位数据组和低位数据组，将一个数据组转换为表示为脉冲高度的驱动信号，并将另一数据组调制为表示为脉冲的驱动信号宽度。驱动电路包括用于将一个数据组调制为表示为脉冲宽度的驱动信号的脉宽调制（PWM）电路和用于将另一数据组转换为表示为脉冲高度的驱动信号的数字模拟转换电路。

32. 发明授权

US6034669A Joystick control device having cursor correcting function 失效
标题翻译：操纵杆控制装置具有光标校正功能
公开(公告)号：US6034669A
公开(公告)日：2000-03-07
申请号：US22839
申请日：1998-02-12
申请人： Ting-Chi Chiang , Fu-Yuan Cheng , Huai-Yi Chen
发明人： Ting-Chi Chiang , Fu-Yuan Cheng , Huai-Yi Chen
IPC分类号： G05G9/047 , G06F3/038 , G09G5/08
CPC分类号： G06F3/0383 , G05G9/047 , G05G2009/04759
摘要： A joystick control device having cursor correcting function, in which the conventional adjustable resistor is replaced by a photoelectric element for detecting the movement of the joystick, thereby eliminates the ill effects caused by mechanical attrition of resistor. Additionally, the parameter drifts caused by IC manufacturing processes are corrected using shift correction of joystick; therefore, every individual mass-produced IC shows similar good behavior.
摘要翻译：具有光标校正功能的操纵杆控制装置，其中常规可调电阻器被用于检测操纵杆移动的光电元件代替，从而消除由电阻器的机械磨损引起的不良影响。另外，由IC制造过程引起的参数漂移使用操纵杆的移位校正来校正; 因此，每个大批量生产的IC都表现出类似的良好行为。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式