Positive-feedback (PF) device and its operation scheme to implement pulse width modulation (PWM) function was proposed and demonstrated, and the device operation mechanism for implementing PWM function was analyzed. By adjusting the amount of the charge stored in the n- floating body (Qn), the potential of the floating body linearly changes with time. When Qn reaches to a threshold value (Qth), the PF device turns on abruptly. From the linear time-varying property of Qn and the gate bias dependency of Qth, fully functionable PWM neuron properties including voltage to pulse width conversion and hard-sigmoid activation function were successfully obtained from a single PF device. A PWM neuron can be implemented by using a single PF device, thus it is beneficial to extremely reduce the area of a PWM neuron circuit than the previously reported one.

中文翻译：

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单正反馈装置实现的脉宽调制神经元

提出并论证了正反馈（PF）器件及其实现脉宽调制（PWM）功能的工作方案，分析了实现PWM功能的器件工作机制。通过调整存储在 n- 浮体 (Qn) 中的电荷量，浮体的电位随时间线性变化。当 Qn 达到阈值 (Qth) 时，PF 设备会突然开启。根据 Qn 的线性时变特性和 Qth 的栅极偏置依赖性，可以从单个 PF 器件成功获得完全可用的 PWM 神经元特性，包括电压到脉冲宽度的转换和硬 sigmoid 激活函数。PWM 神经元可以通过使用单个 PF 器件来实现，因此与之前报道的相比，极大地减少了 PWM 神经元电路的面积是有益的。