飞利浦SAA7220P/A, /B & /C类型的差别-惠州市少帅音响科技有限公司

少帅音响会员登录

没有账号?30秒快速注册
注册会员的好处
1、注册会员,立即赠送元现金。
2、注册可获得专属帐户,尊享品质服务;
3、获得更多特价促销信息;
4、在线提交售后保修,查阅保修进程。
纯净线性电源
三层滤波+纯线性分立式稳压电源工作!
DIY定制
一对一专业客服接待,按客户要求定制。
专业开发团队
拥有一支专业扎实、团结进取、朝气蓬勃的技术研发团队!
产品齐全
DAC解码、耳放、数字界面、线性电源、数字播放器。

当前位置 : 首页>技术中心

飞利浦SAA7220P/A, /B & /C类型的差别
收藏 打印 发给朋友 举报
来源:少帅音响 发布者:管理员 浏览:7838 阅读权限:游客 发表时间:2015/6/17 11:27:44
标签: 飞利浦 

飞利浦saa7220p /最初被设计用于数字音频应用使用频率44.1kHz的采样率(±10%)。它也可以用于32(±10%)和48kHz(不耐受)的应用如数据。
的saa7220p / B是一种改进的'装置给1dB的FIR滤波器的通带性能更好的版本,使用不同的ROM系数达到。这两种类型的另一个区别是,在累加器中的偏移量大大减小(+ 0.05%在“B”相比,5%的“A”)。的saa7220p /必修+ 5%偏移,当使用TDA1541双DAC提供最佳性能。然而,与“B”版胶印不再是必要的性能优化。
的saa7220p证已专门设计用于卫星更好的性能(32)的应用。又有一套不同的ROM系数。他们是这样选择的,过渡带(0~50dB)比“A”或“B”的版本,14.6 17.0khz更尖锐(为“C”)相比,14.6 17.7khz(为“A”和“B”)在32kHz采样率。的saa7220p证也有降低蓄电池偏移±0.05%。
后过滤
“A”和“B”的saa7220版本被设计用来与三分之一阶巴特沃斯或贝塞尔汤姆森后滤波器的通带具有滚降补偿这。“C”版的第四阶椭圆滤波器的建议,为了给一个平坦的整体反应。


====================================

==============国外原文================

====================================

The SAA7220P/A was originally designed for digital audio applications using a sampling rate frequency of 44.1kHz (±10%). It can also be used for 32kHz(±10%) and 48kHz(no tolerance) applications suc as DAT. 

The SAA7220P/B is an improved version of the 'A' device giving 1dB better performance in the passband of the FIR filter, achieved by using different ROM coefficients. The other difference between the two types is that the offset in the accumulator is greatly reduced (+0.05% in the 'B' compared to +5% in the 'A'). The SAA7220P/A required a +5% offset to give optimum performance when used with the TDA1541 dual DAC. However, with the 'B' version this offset is no longer necessary for optimum performance. 

The SAA7220P/C has been specifically designed for better performance for satellite (32kHz) applications. Again it has a different set of ROM coefficients. They are chosen such that the transition band (0 to -50db) is much sharper than for the 'A' or 'B' versions - 14.6 to 17.0kHz (for the 'C') compared to 14.6 to 17.7kHz (for the 'A' and the 'B') at the 32kHz sampling rate. The SAA7220P/C also has the reduced accumulator offset to +0.05%. 

Post filtering
The 'A' and the 'B' versions of the SAA7220 are designed to be used with a third order Thomson-Butterworth or Bessel post filter as the passband has roll-off compensation for this. For 'C' version a 4th order elliptical filter is recommended in order to give a flatter overall response.

会员登录

用户名:
密 码:
验证码: 图片看不清?点击重新得到验证码
会员:1660位 欢迎新会员:zfpsor

技术搜索


友情链接


service@hifiss.com
  • 少帅音响官方微信

    微信号:hifiss_com
    QQ群:166658170

  • 微信号:hifiss_com QQ群:113992955

    0752-2226716 Email:service@hifiss.com
  • 销售咨询 技术服务

官方微信

© 2010-2024All Rights Reserved.惠州市少帅音响科技有限公司V3.04 Beta1HiFiSS.Com Inc.粤ICP备2021045092号