In most cases it is derived from the AC mains by means of a transformer and rectifier.
大多数情况下直流电是从交流电通过变压器和整流器而来的。
A design method of using GAL to make a constant current source is introduced, proving a new method of current stabilization by means of driving regulated transformer by a controlling device.
主要介绍以可编程门阵列器件构成恒流源核心控制电路的设计思路，通过机电自控装置驱动可调变压器实现新的稳流方法，实验证明这一方法是可行的。
In this paper, a new scheme to realize O-QAM system by means of cascading a discrete cosine transformer (DCT) and a weighting network is presented.
本文提出用离散余弦变换(DCT)处理器级联一个权重网络实现O -QAM系统的新方案。
This USES local negative feedback to the screen grids of the output stage by means of a tapped output transformer primary.
这种利用当地的负反馈到屏幕上电网的输出级通过利用输出变压器初级。
This USES local negative feedback to the screen grids of the output stage by means of a tapped output transformer primary.
这种利用当地的负反馈到屏幕上电网的输出级通过利用输出变压器初级。
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