【摘要】 提出了运用数字电路技术直接处理一位Σ-△编码位流信号的新方法。首先,提出了处理位流编码的2个基本模块:位流加法器和乘法器;然后,利用基本模块可以方便组成积分器、滤波器等电路。研究了位流加法器和乘法器的基本原理,提出了可实现电路。采用位流信号直接处理器,可以避免在位流信号和多位信号之间的转换;其次,可以有效地节约信号的物理布线;最后,位流处理器具有比Nyquist采样率处理器更少的硬件电路资源。直流电机PI控制仿真实验表明:该电路可行、具有很高的效率。更多还原

【Abstract】 The paper presents a new method to processing bit-stream signals directly with the digital technique. The basic two blocks, bit-adder and bit-multiplexer, are described and composed of other circuit units effectively, such as filter and bit-stream square root circuit. The principle of the blocks are investigated and realized with the digital circuit. Bit-stream over-sampling processors have three advantages over multi-bit Nyquist rate processors. First, single-bit/ multibit converters are not needed at the inputs and outputs of the processors. Secondly, the physical areas for routing the signals among the circuit modules are small. Thirdly, the processors are built from a smaller number of logic gates than conventional Nyquist rate processors. As an application of the technique to digital signal processing, a current PI control of DC motor is presented and simulations show the effectiveness and the feasibility.更多还原