用DSP实现导频制立体声编码器

本文先简要介绍了DSP技术的发展及其特点 ,特别介绍了德克萨斯仪器公司开发生产的DSK的基本结构和特点。然后详细讨论了导频制立体声的原理 ,及采用TMS3 2 0C50DSP芯片和TLC3 2 0 40模拟接口电路实现导频制立体声编码的设计方案。样点值在中断程序中完成 。

导频制调频立体声解调的新方法

本文提出了一种新型的导频制调频立体声解调器,从原理上分析了鉴频及解码两部分,分析证明本法对导频制调频立体声接收机的分离度有较大的提高,值得推广。

基于TMS320F206立体声数字测试仪的设计

研究了用DSP技术实现导频制立体声测试系统,提出了一种使用低档DSP芯片TMS320F206和高速A/D芯片MAX121,实现高精度立体声解码的方案。具有实现简单、抗干扰能力强、性能指标高、与数字显示电路接口设计方便等优点,达到了较高的性能/价格比。

Modulation Depth Based on Frequency-shift Characteristic of LiNbO3 Waveguide Electro-optic Intensity Modulator

The modulation depth, defined according to practical modulation results, which changes with the microwave power and its frequency, is significant for systems utilizing the frequency-shift characteristic of the LiNbO3 waveguide Electro-Optic Intensity Modulator （EOIM）. By analyzing the impedance mismatch between the microwave source and the EOIM, the effective voltage applied to the RF port of the EOIM is deprived from the microwave power and its frequency. Associating with analyses of the phase velocity mismatch between the microwave and the optical wave, the theoretical modulation depth has been obtained, which is verified by experimental results. We provide a method to choose the appropriate modulation depth to optimize the desired sideband through proper transmission bias for the system based on the frequency-shift characteristic of the EOIM.

实验调频立体声/电视信号发射台

本文介绍一种性能价格比较高的调频立体声及其电视信号发射系统。此装置适用于各学校。