Abstract
AbstractThis paper describes a method to avoid the singular problem at the “S‐control” algorithm. The “S‐control” is proposed to determine the correct operating state in any bipolar transistor network (BTN). Each diode of the Ebers‐Moll model is replaced with a directional switch called an S‐branch which has “on” and “off” states. The switch status is changed by the S‐control algorithm. However, the matrix singular problem occurs in the process of the S‐control. The singular matrix is formed by a cutset of only current sources or a loop of only voltage sources. The singular problem is solved by the signdiscrimination method by which the sign of each node voltage is judged by the introduction of small immittances in cutset (loop) of only current (voltage) sources formed in process of the S‐control. The S‐control algorithm will be continued to obtain the next switch state unless the limit cycle is not generated.
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