A novel active‐input cascode current mirror with high precision and low power dissipation

Abstract

Abstract In this article, a novel active‐input cascode current mirror (CM) with high precision and low power consumption is proposed. First, the cascode input structure is employed upon the active‐input CM to reduce the requirement of high‐gain op‐amp. In addition, the extra branch to the ground is designed. Subsequently, the resistance adaptive loop is separated from the current replication loop to eliminate the matching obstacle between two op‐amps. The proposed CM fulfilled in 0.18 μm CMOS technology, is able to operate with a supply voltage of 1.0 V, wide input range of 100 nA–1 mA, low power dissipation of 40 μW, and lower replication error (below 1.4%) than the same configuration using the conventional active‐input mechanism.

Keywords

• active‐input
• cascode output
• current mirror
• replication error