论文部分内容阅读
本文介绍使用消费者微电路公司(CONSUMER MICROCIRCUITS LIMITED)生产的CVSD FX309器件的一些经验。该器件采用了一些改善波形编码以及降低量化噪声的新措施。用该器件组成的CVSD电路电气性能优于用MOTOROLA公司MC3517器件组成的CVSD电路。文中对电路的工作原理作了扼要地阐述,而且介绍了调试方法并给出了测试结果,最后对电路的电气性能与MG3517CVSD进行了比较。当电路各主要元件值独立地发生变化时对S/N性能的影响,也作了一些讨论。
This article describes some of the experiences with CVSD FX309 devices manufactured by Consumer Micro Circuits Limited. The device incorporates new measures to improve waveform coding and reduce quantization noise. The CVSD circuit composed of this device has better electrical performance than the CVSD circuit composed of the MC3517 device from MOTOROLA Corporation. In this paper, the working principle of the circuit is briefly described, and the debugging method is introduced and the test results are given. Finally, the electrical performance of the circuit is compared with MG3517CVSD. The effects of S / N performance when the major component values of the circuit vary independently are also discussed.