Trust-Region Method with Deep Reinforcement Learning in Analog Design Space Exploration. - Kai-En Yang; Chia-Yu Tsai; Hung-Hao Shen; Chen-Feng Chiang; Feng-Ming Tsai; Chung-An Wang; Yiju Ting; Chia-Shun Yeh; Chin-Tang Lai (DAC, 2021)