I. INTRODUCTION
Maet al. studied the interesting parallel RLC circuit of Fig. 1 in [1], for two specific cases: (i) 12 0RR and 3RR and (ii) 1 2 3 R R R R . On the other hand, Cartwright et al. [2] recently studied the circuit of Fig. 1 in detail for 12 ,0R R R and 3 . R