| 摘要 |
PURPOSE: A substrate voltage generation circuit is provided to supply the substrate voltage to the low power system, safely. CONSTITUTION: A substrate voltage generation circuit includes a first and a second pumping devices(C3,30), a first and a second precharge devices(20,40) and a transfer transistor(PM4). The first pumping device(C3) supplies the pumping voltage to the node(N3) by receiving the first pulse signal(CP1). The first precharge device(20) receives the first pulse signal(CP1) and precharges the received the first pulse signal to the ground voltage. The second pumping device(30) receives the first pulse signal(CP1) and supplies the pumping voltage to the node(N5). The second precharge device(40) receives the second pulse signal(CP2) and precharges the node(N5) as the ground voltage. And, the transfer transistor(PM4) provided with a source terminal connected to the node and a drain terminal to output the substrate voltage(VBB) and a drain terminal connected to the node(N5) transfers the status of the node(N3) to the substrate.
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