Auto-range current mirror circuit for use in driving circuit of LED, has current sensing circuit that outputs controlling signal to front and rear stage current mirrors, to adjust amplifying rate according to present input current

摘要

The auto-range current mirror circuit comprises a current sensing circuit each electronically connects to the front and rear stage current mirrors. The current sensing circuit outputs a controlling signal to the front and rear stage current mirrors, to adjust a suitable amplifying rate according to the present input current.