“…In Table 2, the performance of the proposed TBIs are com- pared with others [13][14][15][20][21][22][23][24][25][26][27] in terms of primary inductance, size, tuning range, Q-factor, and action voltage. Due to the narrow tuning range characteristics below 233 and the need for voltage above 7 V or special operating signals, the tunable inductors [14,15,[20][21][22][23][24][25][26] using MEMS actuators have limitations for general product applications. In Park et al [13], a multi-layer stacked inductor switched by MOSFETs is reported.…”