发明名称 CURRENT MIRROR AND CONSTANT-CURRENT LED DRIVER SYSTEM FOR CONSTANT-CURRENT LED DRIVER IC DEVICE
摘要 Embodiments of a current mirror for a constant-current light-emitting diode (LED) driver system and a constant-current LED driver integrated circuit (IC) device having the current mirror are described. In one embodiment, a current mirror includes at least one current mirror cell. Each of the at least one current mirror cell includes semiconductor circuits configured to generate an output current based on a reference current and a control module configured to alternately and continuously charge the semiconductor circuits in response to non-overlapping clock signals.
申请公布号 US2017086268(A1) 申请公布日期 2017.03.23
申请号 US201514861385 申请日期 2015.09.22
申请人 NXP B.V. 发明人 Wang Ge
分类号 H05B33/08 主分类号 H05B33/08
代理机构 代理人
主权项 1. A current mirror for a constant-current light-emitting diode (LED) driver system, the current mirror comprising: at least one current mirror cell, wherein each of the at least one current mirror cell comprises: a plurality of semiconductor circuits configured to generate an output current based on a reference current; anda control module configured to alternately and continuously charge the semiconductor circuits in response to a plurality of non-overlapping clock signals; wherein the semiconductor circuits include first and second semiconductor circuits, which are connected to a voltage rail, to a reference current signal path from which the reference current is received, and to a current output signal path to which the output current is output wherein the control module comprises a first control circuit and a second control circuit, wherein the first control circuit comprises a first set of switches connected to a gate terminal of the first semiconductor circuit, connected to the reference current signal path, and connected to the current output signal path, and wherein the second control circuit comprises a second set of switches connected to a gate terminal of the second semiconductor circuit, connected to the reference current signal path, and connected to the current output signal path.
地址 Eindhoven NL