基于I^2C总线控制的音频处理电路设计  

Design and Implementation of Audio Processor Based on I^2C-Bus Control

作　　者：孙金中[1] 冯炳军[2] 

机构地区：[1]中国科学院微电子研究所,北京100029 [2]杭州中科微电子有限公司,浙江杭州310053

出　　处：《现代电子技术》2009年第18期85-88,共4页Modern Electronics Technique

摘　　要：采用CMOS DPDM工艺,设计并实现一款高性能音频处理电路芯片,该芯片基于I2C总线控制协议,具有四声道独立立体声选择、输入音量控制、高低音音频信号处理、输出四通道平衡度调整等功能,其主要应用于高级音响系统中。在电路结构中首次采用交叉开关实现运放复用,减小了版图面积,降低了芯片成本。电路测试结果满足了各功能模块的设计要求。The high performance audio processor is designed and implemented using CMOS DPDM process,which contains four independence-trace stereo input selected,volume controlled,the bass and the treble controlled and output balance controlled functions.It is mostly applied in the sound system.The highlight is the first use of operation amplifier sharing through crossing of the switch,greatly reducing the area of the layout and cost of the circuit.The test result fulfills the design specification.

关 键 词：音频电路 I^2C总线 频率响应 交叉开关 

分 类 号：TN402[电子电信—微电子学与固体电子学]