Current driver and method of precisely controlling output current,申请号US20030365432-传众专利搜索

Current driver and method of precisely controlling output current

申请公布号：US6922045(B2)

申请号：US20030365432

申请日期：2003.02.13

申请公布日期：2005.07.26

申请人：

PRIMARION, INC.

发明人：SELF DAVID W.;MCCLAY C. PHILLIP

分类号：G05F3/26;G05F3/30;H03F3/345;(IPC1-7):G05F3/16;G05F3/20

主分类号：G05F3/26

摘要：Disclosed is current driver circuit comprising a bandgap reference circuit for generating a fixed current and a current proportional to absolute temperature (PTAT), a temperature compensator for combining the fixed and PTAT currents and forming first and second temperature compensated currents, a current control circuit for modifying said first and second temperature compensated currents in response to signals representing the characteristics of a load device and a driver circuit for amplifying and supplying a selected one of said first and second temperature compensated currents to said load device. Also disclosed is a method of supplying a precisely controlled current by generating a constant current and a current proportional to absolute temperature (PTAT), combining these two currents and providing temperature compensated currents, modifying the temperature compensated currents with a programmed reference signal and supplying a precisely controlled current to a load device.