论文部分内容阅读
本文研究了一种新型的A律非线性编码器——双向折叠逐位反馈比较型编码器。它采用数字控制的方法,对较低电平的信号进行预置放大,然后进行逐位反馈比较编码,并提出一种极性码另判并纠错的方法,可进一步改善小信号时的信号量化失真比。本地译码器采用恒流馈电对称梯形网络,具有抑制共模干扰的能力。 文中着重论述了影响编码器精度的各种因素,计算了编码器性能的理论值,并进行了误差分配。 此编码器已用于脉冲编码基群终端机,性能良好,工作稳定。
In this paper, we study a new type of A-law non-linear encoder-bi-directional folding bit by bit feedback comparison encoder. It adopts the method of digital control to pre-amplify the signal of the lower level, then encodes the bit by bit, and proposes a method of judging and correcting the polarity code, which can further improve the signal of small signal Quantify the distortion ratio. Local decoder using constant current symmetrical ladder network, with the ability to suppress common-mode interference. This paper focuses on the various factors that affect the accuracy of the encoder, calculates the theoretical value of the encoder performance, and carries out the error distribution. This encoder has been used for pulse code group terminals, good performance, stable work.