摘要
数字电位器具有独特的性能:体积小,抗震性强,非易失性,可编程,易于与单片机接口,它已广泛应用在自动化仪表等领域中,为了给用户提供友好的界面,使用户操作更具智能化,语音终端采用数字电位器进行音量和液晶对比度调节。着重介绍了数字电位器的基本结构,并与机械式电位器进行了比较。以X9511W和X9312为例,详细地讨论了分别采用按钮控制式和串行信号控制式两类数字电位器对语音终端的音量和液晶对比度进行调节的具体应用,并给出了X9312的应用程序。
Digital potentiometers has some special features such as small size,good anti-seismic,non-volatilation,programmability,and easy interfacing with a single chip microcomputer.It has been widely used in automatic instrument and other fields.To provide a more better user interface and more intel-lective manipulation,digital potentiometer is adopted in speech terminal to adjust the volume and LCD contrast.The paper introdues the basic structure of digital potentiometers and comparison with me-chanic potentionmeters.The application of botton-mode and serial-mode digital potentiometers is pre-sented,taking X9511W and X9312as examples.The application program of X9312is given.[
出处
《电声技术》
北大核心
2003年第12期32-34,共3页
Audio Engineering
基金
国家创新基金资助(00C26215111326).
