发明名称 |
VBB reference for pumped substrates |
摘要 |
<p>An embodiment of a pumped substrate system includes an oscillator, capacitive pump, comparing circuit, and a level shifter. The level shifter is coupled between the substrate and the positive input lead of the comparator and shifts the voltage level present on the substrate by a voltage Vbg. The comparator compares ground potential to the shifted substrate voltage. The oscillator, capacitive pump and comparing circuit form a negative feedback loop which operates to maintain the substrate voltage substantially equal to -Vbg. In one embodiment, the level shifter includes a band gap reference. <IMAGE></p> |
申请公布号 |
EP0732796(A2) |
申请公布日期 |
1996.09.18 |
申请号 |
EP19960200598 |
申请日期 |
1996.03.08 |
申请人 |
LATTICE SEMICONDUCTOR CORPORATION |
发明人 |
GORECKI, JAMES;LALL, RAVINDAR;LEFFERTS, ROBERT B. |
分类号 |
G05F3/20;H01L27/04;G05F3/26;G11C5/14;G11C11/408;H01L21/822;H02M3/07;H03K19/094;(IPC1-7):H02M3/07 |
主分类号 |
G05F3/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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