发明申请
- 专利标题: LOW-POWER VOLTAGE REGULATOR
- 专利标题(中): 低功率电压调节器
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申请号: US12551788申请日: 2009-09-01
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公开(公告)号: US20110050198A1公开(公告)日: 2011-03-03
- 发明人: Zhiwei Dong , William W. K. Tang , Axel Thomsen
- 申请人: Zhiwei Dong , William W. K. Tang , Axel Thomsen
- 主分类号: G05F3/16
- IPC分类号: G05F3/16
摘要:
A technique for reducing power dissipation and circuit area for a high voltage application includes creating a low-voltage, local power supply for use with local circuitry. In at least one embodiment of the invention, an apparatus includes an output node configured to provide a regulated output voltage. The apparatus includes a variable current source coupled to a first power supply node, wherein the variable current source is configured to provide an output current to the output node based on a control signal on a control node. The apparatus includes a feedback circuit configured to generate the control signal based on a mirrored current. The mirrored current is a mirrored version of a residual current flowing between the output node and a second power supply node. The regulated output voltage has a voltage level less than the voltage level on the first power supply node.