To meet the needs of present era of low power portable electronic equipment, many low voltage design techniques have been developed. This led to the analog designers to look for innovative design techniques like self-cascode CMOS current mirror. In this paper, the authors have investigated the merits and demerits of various current mirror configurations. In this paper, the current mirror presented, having low voltage and mixed mode structure has been proposed. The performance of self-cascade MOSFET current mirror is optimized with high output impedance and can operate at 1 V or below.